New Circuits Page 124
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This tutorial is in continuation with previous tutorials on 8051 Assembly Programming. Now we will learn how to give input and output instructions to 8051 microcontroller(s) using assembly programming language. The microcontroller has total forty pins in....
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These two headlight reminder circuits are easy to install and operate on the KISS (Keep It Simple Stupid) principle. The simple circuit involves adding just a 12V piezo buzzer between the lights circuit and a door switch. The buzzer sounds if the lights are....
-
TDA1072AT is a special purpose integrated circuit for AM radio receiver from Philips Semiconductors. The integrated circuit is designed for mains-fed home receivers and car radios. The voltage-controlled oscillator provides signals with extremely low....
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Make a circuit with a 555 timer to run 72 LEDs all at the same time. I have already made a circuit, but am not sure If it will work safe and long or not. I am putting the picture of the circuit and I want anybody who can help to look at it and see if it....
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This design is based on one published by Milan Lulic in the German magazine elektroModell. Mr. Lulic`s design is for surface mount technology (SMT) construction, whereas mine uses standard off-the-shelf components, and is therefore better suited to....
-
-
UM3561 is an excellent ROM IC that can generate Multi siren tones simulating Police siren, Ambulance siren, Fire brigade siren and Machine gun sound. This 8 pin low power IC can work down to 2. 4 volts. The UM 3561 is a low cost siren generator designed for....
-
This is a 9vdc powered LM13700 dual transconductance op-amp based filter very suitable for battery powered circuits. The design is based on an article by R. A. Penfold for maplin magazine but i have adapted the schematic to have manual filter cut-off and....
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An additional push-button switch is normally required for the ATX Power Switch/Soft Power Switch signal, but you can do without it if you use this simple circuit. It is an artful design, but it has been repeatedly tested. The zener diode is intended to....
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This is a simple circuit which I built to one of my audio amplifier projects to control the speaker output relay. The purpose of this circuit is to control the relay which turns on the speaker output relay in the audio amplifier. The idea of the circuit is....
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A drink mixer inspired by BAR2D2, I am using a gravity fed pump that is capable of running on a 9v battery. I am using a circuit with a 555 timer to control how long the pump will run. When I hook the pump directly to the battery the pump runs perfect. When....
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Back cover removed showing the power supplies upper deck and the original Dayton 2C915A (220vac - 140cfm blower) mounted to the underside of the cabinet. The RF deck enclosure was removed. Upper deck of the power supply with the original blower removed. From....
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An explanation of how the thing should work. The TPS_EN line is low at first. Since it is pulled down by a 10k pull down resistor(not shown in the schematic). When the user presses S2, the mosfet Q2 turns on because ground is applied to its gate. which....
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The circuit for a powerful AM transmitter using ceramic resonator/filter of 3. 587 MHz is presented here. This circuit is based on transistor for the core operation of the circuit. Resonators/filters of other frequencies such as 5. 5 MHz, 7 MHz and 10. 7 MHz....
-
This Programming interface circuit sends the programming signals from the USB cable to the FPGA chip directly, through a standardized 10-PIN interface. Technically there are only 4 or 5 signal pins used, excluding GND and unused interface pins from the....
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-
IR`s Wibowa Chou explains the advantages of 4th-generation IGBTs over MOSFETS with a practical solar inverter application...
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-
Usually, LED is powered by DC supply, but this circuit can make the LED can be powered by AC supply. This circuit can be used as power indicator for Water pump....
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Here`s video transmitter circuit is working on the UHF channel frequency 470-580 MHz channel 21-34. This video transmitter can radiate as far as 30-100 meters by using a cable 10-20 cm. If you have a plan to amplify this video transmitter`s signal, please....
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Stitching Machine Motor Speed Control, Motor operated stitching machines have a series of carbon buttons in an enclosure operated by foot pedal. As the pressure on the foot pedal is increase....
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This Low Dropout Voltage (LDO) solar charge controller uses a simple differential amplifier and series P channel MOSFET linear regulator ”their compatibility seems like a marriage made in heaven. Voltage output is adjustable. It is mainly intended for....
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By design, the pump will stop only if the volume set by the four position selector switch has been reached. Notwithstanding, it will also stop if: From what I think I understand, pressing `Pc` (brew button) sets it `closed` momentarily, sending power to `Ec`....
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Many low pass filter circuits for subwoofer seem to be given And this is also just Another one. The circuit given here is Depending about the opamp TL062 from one ST Micro electronics. TL062 is really a dual high input impedance J-FET opamp And this has....
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To send the Sony command "TV - mute", the command would be infraout 1, 20. Note that device should always be 1 when used in PICAXE projects and data can only be between 0 and 127, as the SIRCS protocol only specifies 7-bit capability. The full program for....
-
The schematic below illustrates dividing a crystal oscillator signal by the crystal frequency to obtain an accurate (0. 01%) 1 second time base. Two cascaded 12 stage counters (CD4040) form a 24 stage binary counter and the appropriate bits are gated....
-
Voltage regulator ICs (78xx series) provide a steady output voltage, as against a widely fluctuating input supply, when the common terminal is grounded. Any voltage about zero volt (ground) connected in the common terminal is added to the output voltage.....
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In this section we would like to introduce you a transistor oscillator circuit, called as RC Phase shift Oscillator. First of all we need to know what is an oscillator. An oscillator is an electronic circuit which acts as a sine wave generator. The only....
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This is a simple ceiling fan regulator circuit diagram. It is used to control the speed of a ceiling fan. In the other words it is an AC motor speed controller circuit, as because its control the speed of a AC motor(Ceiling Fan). This ceiling fan regulator....
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This is the sound generator which will simulate British police car siren. The circuit is built using 2 pieces of timer IC 555 to generate sound frequency. How the circuit work: The 555 on the right is wired as an alarm sound generator and t....
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This application note analyzes the details of a Wien-bridge oscillator, shows how a JFET maintains oscillation, and demonstrates adding a digital potentiometer (digipot), rather than a variable resistor, to improve stability and flexibility....
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1988 Honda Civic Tail Light Wiring Diagram...
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There is a lot you need to know to completely design an inverter. Unless you can acquire a custom made transformer your circuit design is ruled by th....
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This digital voltmeter is ideal to use for measuring the output voltage of your DC power supply. It includes a 3. 5-digit LED display with a negative voltage indicator. It measures DC voltages from 0 to 199. 9V with a resolution of 0. 1V. The voltmeter is....
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attribution You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). This file contains additional information, such as EXIF metadata, probably added from....
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I am always being asked where the defrost timer is located on a refrigerator. Unfortunately the location varies depending on the manufacturer and model. Some are located in the rear near the compressor. Others are behind the louvered kick-plate in the front.....
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There are various obvious methods of rust removal, but these methods are unsuitable for very old or valuable artifacts as they tend to be destructive in use, meaning that along with the rust some of the base metal is also removed. Dissolving the rust with....
-
Though some might argue that Serial port are things in the past, it is still the most popular port for those who are into electronic DIY. Building electronic device with serial port interface is cheaper than buiding one that uses USB. That is the reason why....
-
Circuit shows how to interface the Wi-Fi with microcontroller. The Wi-Fi module continuously transmits or receives serial data (RS232 protocol) through internet without wires. It delivers the received data and receives the data to be transmitted to and from....
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Introduction: Token Display System are ideal for Banks, Airports, Public dealing offices , Hospitals , Doctors Clinics, Restaurants and other such places where people have to wait in line for Token Display System are ideal for Banks, Airports, Public....
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Here is a one transistor LED flasher circuit which will flash a super bright LED. The circuit is using single transistor as driver which is taking flash rate from the LED 2 which is a self flashing LED. The flash rate can be adjusted by changing the value of....
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ART TPS2 is a starved tube mic preamp. One 12AX7 tube operating at about 50v plate voltage to add color to the sound. As I intended to build a all solid state preamp, the 12AX7 and its peripheral component were removed. The right channel input stage is....
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This is the 100W DC inverter build based transistored multivibrator as well as transistor signal amplifier. The inverter will convert 12V DC voltage in the input and increase the voltage level to become about 220V AC. 12V car battery is recomended to be used....
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In this figure S1 can start timing and when the timer starts, turning this switch has no effect.S2 is the OFF switch in the middle and turning this switch can make the timer complete the procedure: charging-open circuit-discharging. Because of charging....
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This circuit interfaces a standard RC-control to a standard PC game port, see figure 1. The main target was to use the interface for the FMS flight simulator. The interface makes it possible to use a standard RC radio to control the FMS flight simulator....
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A simple home project can turn catastrophic fast if you come up against an electric cable, gas and water pipes, or your central heating system. With a handy metal detector you can check beforehand whether there are metal objects in a wall, ceiling or floor.....
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This circuit creates a stunning display of the "magic" of magnetism by suspending a small metal object in mid air. Using an electromagnet, photo sensor and closed loop control, small and light metal objects can be floated just underneath the magnet, enclosed....
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This simple circuit uses a 741 op-amp in differential mode as a continuity tester. The voltage difference between the non-inverting and inverting inputs is amplified by the full open loop gain of the op-amp. Ignore the 470k and the 10k control for the....
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A pulsating light for a certain signaling. Voltage was 230V. So I decided to make a simple circuit, consisted of a LED diode, two capacitors, two resistors, a diac and a diode. Activity of the circuit is extraordinarily simple. The capacitor charges by the....
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This project is an instance of the UsbProg project created by Benedikt Sauter. Bene released the schematics, board layout and firmware as an open-source project. I took that project and made these modifications: Or, optionally, place a jumper across JP3 pins....
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The clock was experimental until I picked up some experience with the circuitry. I experimented with the idea of building an alternating display using two B-5560 nixie tubes but ended up using 4 nixies instead. The original idea was to display the hours,....
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This TDA2005 car audio amplifier circuit is specially designed to work on devices like : car radios, cd-players and similar devices. This car radio audio amplifier circuit is based on the TDA2005 audio IC which can provide a maximum output power of 20 watts....
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The following circuit shows about 12-volt Modular Burglar Alarm Sensor Circuit Diagram. Features: a timed Bell Cut-off., automatic Exit and Entry ....
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Video switch is required to mux/multiplex several video sources, enable multiple camera to be displayed subsequently on a single monitor. This multiplexing....
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This is cable TV amplifier using 2 transistors. This amplifier circuit is for cable TV systems using Ohm coaxial cables and works fine up to 150MHz. Transistor T1 performs of amplification. Up to 20dB gain expected from the circuit. T2 is wired as an emitter....
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A Variable DC Power Supply is one of the most useful tools on the electronics hobbyist`s workbench. This circuit is not an absolute novelty, but it`s simple, reliable, "rugged" and short-proof, featuring variable voltage up to 24V and variable current....
-
-
This is a metronome circuit that has mechanical sound character. The metronome that has mechanical sound character will make our life more fun and it would be ...
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This circuit uses a 555 timer that is setup to each runn in associate Astable operative mode. This generates a nonstop output via Pin three within the type of a sq. wave. once the timer`s output changes to a high state this triggers the a cycle the 4017 4017....
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The circuit diagram shows a powerful stereo amplifier which can deliver a power of 22W. It is built around popular single-chip audio power amplifier TDA1554Q (IC1). Here it is configured as two 22W stereo bridge amplifiers. Listening to songs stored in....
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For a project such as a robot or car, we need an ELECTRONIC circuit - one that is controlled by a "CONTROL CIRCUIT". The Control Circuit outputs a signal (or a number of signals) to control an H-Bridge. Here is a circuit of a Hex Bug. The Control Circuit....
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Here the schematic diagram of 70W power amplifier with MOSFET for your audio system. There are possible alternative input stage transistors, the Toshiba 2SA970BL and 2SC2240BL, which appear to be good substitutes for the Hitachi 2SA1085E an....
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Suppose, you want to use the 5Vdc power supply levels up to 100mA, But there is only one single AA 1.5V battery. This working we need to use The DC to DC....
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It will be effective to use simple half wave motor speed control with small universal? ac/dc motors. Two amps RMS is the maximum current capability. The...
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A circuit of LC meter (inductance & capacitance meter) which is base on PIC16F84A microcontroller but i have no code for this IC, i place circuit diagram of the project, so please help me...
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This circuit can be used to identify whether there is a clipping in a particular wave form. Clipping is a phenomenon in which the amplitude of a particular waveform drops before it reaches the expected limit. This circuit glows an LED as an indication if the....
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AC power is rectified and applied to the motor in the same polarity when the momentary switch is held in one direction and reversed polarity when the motor is held in the reverse direction. The remote car starter package that I used includes a control unit,....
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This circuit has been very useful in filling a header tank for a reticulated water supply on a farm. Eight troughs are supplied in different paddocks where a lack of water would have serious consequences for the stock. In the past, the tank had been filled....
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Nikon infrared remote control with some special features interval shots, multiples shots, continuous shots....
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-
The IR3721 is a versatile power or current monitor IC for low-voltage DC-DC Converters The IR3721 monitors the inductor current in buck or multiphase converters using either a current sensing resistor or the inductors winding resistance (DCR). The output....
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Rechargeable lithium-ion (Li-ion) batteries are everywhere these days, powering everything from laptops and tablets to cell phones, MP3 players, digital cameras, and all sorts of portable electronics. But what`s the best way to charge them This app note....
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This handy, pocket-size mobile transmission detector can sense the presence of an activated mobile phone from a distance of one-and-a-half metres. So it can be used to prevent use of mobile phones in examination halls, confidential rooms, etc. It is also....
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Some cheap car alarms do not have a connection for the central locking system. However, in most it should be possible to find a point in the alarm circuit....
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The schematic is in PDF, and cannot be send to you by this site. Check this site. It has some schematics. Check whether the schematic you need is there. Pull up older posts there. I have a WS-55807 that will not power up. When the power button is pressed I....
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A circuit that can detect a light beam cut. The first circuit i made was a light/dark detector with photoresistor. Although it could sense the light cut, it had a major disadvantage: extreme interferences from ambient light. That is why i designed this....
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This voltage-controlled oscillator circuit is very compact and has a good linearity. The author said that the precision could be better than 0. 01% If this circuit is properly constructed. Moreover, this circuit gives three different output waveforms:....
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This cahrger based on chargeing voltage 2, 4 Volts per cell, in accordance with most manufacterers recomendation. This circuit pulses the battery under with 14. 4 Volts ( 6 cells x 2, 4 volts per cell) at a rate 120 Hz. You are reading the Circuits of....
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A sensitive and reliable rf field strength meter is an invaluable instrument in amateur radio and in radio controlled model area. A field strength meter is...
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The circuit is shown as the chart. It is a control circuit which composed of infrared specific integrated circuit KC778B and KC778B is the center of the circuit. It s surrounded by a pyroelectric infrared sensor head PIR, light control and light control....
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Do you drive an older car without an automatic "lights-on" warning circuit If so, you`ve probably accidentally left the lights on and flattened the battery on one or more occasions. This headlights reminder circuit will prevent that. It`s more complicated....
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An increasing number of appliances draw a very small current from the power supply. If you need to design a mains powered device, you could generally choose between a linear and a switch-mode power supply. However, what if the appliance`s total power....
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this is an upgrade circuit from Simple Volume Unit Display Circuit Diagram 1 with more addition power for the audio input.. Component: Resistor, ....
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The following circuit schemes the Ford Probe Single Wire Door Alarm System. This Single Door Locking Wire controls both LOCK and UNLOCK which means the pulse wires have to be connected to the same vehicle wire. The system is basically uses a single wire ( )....
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For our second build in the Make It Last Build Series, we`re constructing a robotic plant. This week, we`re going to put together the brains of the machine, which we will use in the coming weeks to bring our plant to life. This basic circuit will have....
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If a transistor junction operating in Zener breakdown is used as a noise source, the amplitude of the noise signal is asymmetric. This problem can be solved by using two transistors as two independent noise sources. One of these has a series resistor to....
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This chapter contains circuit diagrams for several power supplies for pulsed solid state lasers. These include units suitable for driving the popular Hughes ruby and YAG rangefinder laser assemblies as well, one using the flash from a disposable pocket....
This tutorial is in continuation with previous tutorials on 8051 Assembly Programming. Now we will learn how to give input and output instructions to 8051 microcontroller(s) using assembly programming language. The microcontroller has total forty pins in....
These two headlight reminder circuits are easy to install and operate on the KISS (Keep It Simple Stupid) principle. The simple circuit involves adding just a 12V piezo buzzer between the lights circuit and a door switch. The buzzer sounds if the lights are....
TDA1072AT is a special purpose integrated circuit for AM radio receiver from Philips Semiconductors. The integrated circuit is designed for mains-fed home receivers and car radios. The voltage-controlled oscillator provides signals with extremely low....
Make a circuit with a 555 timer to run 72 LEDs all at the same time. I have already made a circuit, but am not sure If it will work safe and long or not. I am putting the picture of the circuit and I want anybody who can help to look at it and see if it....
This design is based on one published by Milan Lulic in the German magazine elektroModell. Mr. Lulic`s design is for surface mount technology (SMT) construction, whereas mine uses standard off-the-shelf components, and is therefore better suited to....
UM3561 is an excellent ROM IC that can generate Multi siren tones simulating Police siren, Ambulance siren, Fire brigade siren and Machine gun sound. This 8 pin low power IC can work down to 2. 4 volts. The UM 3561 is a low cost siren generator designed for....
This is a 9vdc powered LM13700 dual transconductance op-amp based filter very suitable for battery powered circuits. The design is based on an article by R. A. Penfold for maplin magazine but i have adapted the schematic to have manual filter cut-off and....
An additional push-button switch is normally required for the ATX Power Switch/Soft Power Switch signal, but you can do without it if you use this simple circuit. It is an artful design, but it has been repeatedly tested. The zener diode is intended to....
This is a simple circuit which I built to one of my audio amplifier projects to control the speaker output relay. The purpose of this circuit is to control the relay which turns on the speaker output relay in the audio amplifier. The idea of the circuit is....
A drink mixer inspired by BAR2D2, I am using a gravity fed pump that is capable of running on a 9v battery. I am using a circuit with a 555 timer to control how long the pump will run. When I hook the pump directly to the battery the pump runs perfect. When....
Back cover removed showing the power supplies upper deck and the original Dayton 2C915A (220vac - 140cfm blower) mounted to the underside of the cabinet. The RF deck enclosure was removed. Upper deck of the power supply with the original blower removed. From....
An explanation of how the thing should work. The TPS_EN line is low at first. Since it is pulled down by a 10k pull down resistor(not shown in the schematic). When the user presses S2, the mosfet Q2 turns on because ground is applied to its gate. which....
The circuit for a powerful AM transmitter using ceramic resonator/filter of 3. 587 MHz is presented here. This circuit is based on transistor for the core operation of the circuit. Resonators/filters of other frequencies such as 5. 5 MHz, 7 MHz and 10. 7 MHz....
This Programming interface circuit sends the programming signals from the USB cable to the FPGA chip directly, through a standardized 10-PIN interface. Technically there are only 4 or 5 signal pins used, excluding GND and unused interface pins from the....
IR`s Wibowa Chou explains the advantages of 4th-generation IGBTs over MOSFETS with a practical solar inverter application...
Usually, LED is powered by DC supply, but this circuit can make the LED can be powered by AC supply. This circuit can be used as power indicator for Water pump....
Here`s video transmitter circuit is working on the UHF channel frequency 470-580 MHz channel 21-34. This video transmitter can radiate as far as 30-100 meters by using a cable 10-20 cm. If you have a plan to amplify this video transmitter`s signal, please....
Stitching Machine Motor Speed Control, Motor operated stitching machines have a series of carbon buttons in an enclosure operated by foot pedal. As the pressure on the foot pedal is increase....
This Low Dropout Voltage (LDO) solar charge controller uses a simple differential amplifier and series P channel MOSFET linear regulator ”their compatibility seems like a marriage made in heaven. Voltage output is adjustable. It is mainly intended for....
By design, the pump will stop only if the volume set by the four position selector switch has been reached. Notwithstanding, it will also stop if: From what I think I understand, pressing `Pc` (brew button) sets it `closed` momentarily, sending power to `Ec`....
Many low pass filter circuits for subwoofer seem to be given And this is also just Another one. The circuit given here is Depending about the opamp TL062 from one ST Micro electronics. TL062 is really a dual high input impedance J-FET opamp And this has....
To send the Sony command "TV - mute", the command would be infraout 1, 20. Note that device should always be 1 when used in PICAXE projects and data can only be between 0 and 127, as the SIRCS protocol only specifies 7-bit capability. The full program for....
The schematic below illustrates dividing a crystal oscillator signal by the crystal frequency to obtain an accurate (0. 01%) 1 second time base. Two cascaded 12 stage counters (CD4040) form a 24 stage binary counter and the appropriate bits are gated....
Voltage regulator ICs (78xx series) provide a steady output voltage, as against a widely fluctuating input supply, when the common terminal is grounded. Any voltage about zero volt (ground) connected in the common terminal is added to the output voltage.....
In this section we would like to introduce you a transistor oscillator circuit, called as RC Phase shift Oscillator. First of all we need to know what is an oscillator. An oscillator is an electronic circuit which acts as a sine wave generator. The only....
This is a simple ceiling fan regulator circuit diagram. It is used to control the speed of a ceiling fan. In the other words it is an AC motor speed controller circuit, as because its control the speed of a AC motor(Ceiling Fan). This ceiling fan regulator....
This is the sound generator which will simulate British police car siren. The circuit is built using 2 pieces of timer IC 555 to generate sound frequency. How the circuit work: The 555 on the right is wired as an alarm sound generator and t....
This application note analyzes the details of a Wien-bridge oscillator, shows how a JFET maintains oscillation, and demonstrates adding a digital potentiometer (digipot), rather than a variable resistor, to improve stability and flexibility....
There is a lot you need to know to completely design an inverter. Unless you can acquire a custom made transformer your circuit design is ruled by th....
This digital voltmeter is ideal to use for measuring the output voltage of your DC power supply. It includes a 3. 5-digit LED display with a negative voltage indicator. It measures DC voltages from 0 to 199. 9V with a resolution of 0. 1V. The voltmeter is....
attribution You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). This file contains additional information, such as EXIF metadata, probably added from....
I am always being asked where the defrost timer is located on a refrigerator. Unfortunately the location varies depending on the manufacturer and model. Some are located in the rear near the compressor. Others are behind the louvered kick-plate in the front.....
There are various obvious methods of rust removal, but these methods are unsuitable for very old or valuable artifacts as they tend to be destructive in use, meaning that along with the rust some of the base metal is also removed. Dissolving the rust with....
Though some might argue that Serial port are things in the past, it is still the most popular port for those who are into electronic DIY. Building electronic device with serial port interface is cheaper than buiding one that uses USB. That is the reason why....
Circuit shows how to interface the Wi-Fi with microcontroller. The Wi-Fi module continuously transmits or receives serial data (RS232 protocol) through internet without wires. It delivers the received data and receives the data to be transmitted to and from....
Introduction: Token Display System are ideal for Banks, Airports, Public dealing offices , Hospitals , Doctors Clinics, Restaurants and other such places where people have to wait in line for Token Display System are ideal for Banks, Airports, Public....
Here is a one transistor LED flasher circuit which will flash a super bright LED. The circuit is using single transistor as driver which is taking flash rate from the LED 2 which is a self flashing LED. The flash rate can be adjusted by changing the value of....
ART TPS2 is a starved tube mic preamp. One 12AX7 tube operating at about 50v plate voltage to add color to the sound. As I intended to build a all solid state preamp, the 12AX7 and its peripheral component were removed. The right channel input stage is....
This is the 100W DC inverter build based transistored multivibrator as well as transistor signal amplifier. The inverter will convert 12V DC voltage in the input and increase the voltage level to become about 220V AC. 12V car battery is recomended to be used....
In this figure S1 can start timing and when the timer starts, turning this switch has no effect.S2 is the OFF switch in the middle and turning this switch can make the timer complete the procedure: charging-open circuit-discharging. Because of charging....
This circuit interfaces a standard RC-control to a standard PC game port, see figure 1. The main target was to use the interface for the FMS flight simulator. The interface makes it possible to use a standard RC radio to control the FMS flight simulator....
A simple home project can turn catastrophic fast if you come up against an electric cable, gas and water pipes, or your central heating system. With a handy metal detector you can check beforehand whether there are metal objects in a wall, ceiling or floor.....
This circuit creates a stunning display of the "magic" of magnetism by suspending a small metal object in mid air. Using an electromagnet, photo sensor and closed loop control, small and light metal objects can be floated just underneath the magnet, enclosed....
This simple circuit uses a 741 op-amp in differential mode as a continuity tester. The voltage difference between the non-inverting and inverting inputs is amplified by the full open loop gain of the op-amp. Ignore the 470k and the 10k control for the....
A pulsating light for a certain signaling. Voltage was 230V. So I decided to make a simple circuit, consisted of a LED diode, two capacitors, two resistors, a diac and a diode. Activity of the circuit is extraordinarily simple. The capacitor charges by the....
This project is an instance of the UsbProg project created by Benedikt Sauter. Bene released the schematics, board layout and firmware as an open-source project. I took that project and made these modifications: Or, optionally, place a jumper across JP3 pins....
The clock was experimental until I picked up some experience with the circuitry. I experimented with the idea of building an alternating display using two B-5560 nixie tubes but ended up using 4 nixies instead. The original idea was to display the hours,....
This TDA2005 car audio amplifier circuit is specially designed to work on devices like : car radios, cd-players and similar devices. This car radio audio amplifier circuit is based on the TDA2005 audio IC which can provide a maximum output power of 20 watts....
The following circuit shows about 12-volt Modular Burglar Alarm Sensor Circuit Diagram. Features: a timed Bell Cut-off., automatic Exit and Entry ....
Video switch is required to mux/multiplex several video sources, enable multiple camera to be displayed subsequently on a single monitor. This multiplexing....
This is cable TV amplifier using 2 transistors. This amplifier circuit is for cable TV systems using Ohm coaxial cables and works fine up to 150MHz. Transistor T1 performs of amplification. Up to 20dB gain expected from the circuit. T2 is wired as an emitter....
A Variable DC Power Supply is one of the most useful tools on the electronics hobbyist`s workbench. This circuit is not an absolute novelty, but it`s simple, reliable, "rugged" and short-proof, featuring variable voltage up to 24V and variable current....
This is a metronome circuit that has mechanical sound character. The metronome that has mechanical sound character will make our life more fun and it would be ...
This circuit uses a 555 timer that is setup to each runn in associate Astable operative mode. This generates a nonstop output via Pin three within the type of a sq. wave. once the timer`s output changes to a high state this triggers the a cycle the 4017 4017....
The circuit diagram shows a powerful stereo amplifier which can deliver a power of 22W. It is built around popular single-chip audio power amplifier TDA1554Q (IC1). Here it is configured as two 22W stereo bridge amplifiers. Listening to songs stored in....
For a project such as a robot or car, we need an ELECTRONIC circuit - one that is controlled by a "CONTROL CIRCUIT". The Control Circuit outputs a signal (or a number of signals) to control an H-Bridge. Here is a circuit of a Hex Bug. The Control Circuit....
Here the schematic diagram of 70W power amplifier with MOSFET for your audio system. There are possible alternative input stage transistors, the Toshiba 2SA970BL and 2SC2240BL, which appear to be good substitutes for the Hitachi 2SA1085E an....
Suppose, you want to use the 5Vdc power supply levels up to 100mA, But there is only one single AA 1.5V battery. This working we need to use The DC to DC....
It will be effective to use simple half wave motor speed control with small universal? ac/dc motors. Two amps RMS is the maximum current capability. The...
A circuit of LC meter (inductance & capacitance meter) which is base on PIC16F84A microcontroller but i have no code for this IC, i place circuit diagram of the project, so please help me...
This circuit can be used to identify whether there is a clipping in a particular wave form. Clipping is a phenomenon in which the amplitude of a particular waveform drops before it reaches the expected limit. This circuit glows an LED as an indication if the....
AC power is rectified and applied to the motor in the same polarity when the momentary switch is held in one direction and reversed polarity when the motor is held in the reverse direction. The remote car starter package that I used includes a control unit,....
This circuit has been very useful in filling a header tank for a reticulated water supply on a farm. Eight troughs are supplied in different paddocks where a lack of water would have serious consequences for the stock. In the past, the tank had been filled....
Nikon infrared remote control with some special features interval shots, multiples shots, continuous shots....
The IR3721 is a versatile power or current monitor IC for low-voltage DC-DC Converters The IR3721 monitors the inductor current in buck or multiphase converters using either a current sensing resistor or the inductors winding resistance (DCR). The output....
Rechargeable lithium-ion (Li-ion) batteries are everywhere these days, powering everything from laptops and tablets to cell phones, MP3 players, digital cameras, and all sorts of portable electronics. But what`s the best way to charge them This app note....
This handy, pocket-size mobile transmission detector can sense the presence of an activated mobile phone from a distance of one-and-a-half metres. So it can be used to prevent use of mobile phones in examination halls, confidential rooms, etc. It is also....
Some cheap car alarms do not have a connection for the central locking system. However, in most it should be possible to find a point in the alarm circuit....
The schematic is in PDF, and cannot be send to you by this site. Check this site. It has some schematics. Check whether the schematic you need is there. Pull up older posts there. I have a WS-55807 that will not power up. When the power button is pressed I....
A circuit that can detect a light beam cut. The first circuit i made was a light/dark detector with photoresistor. Although it could sense the light cut, it had a major disadvantage: extreme interferences from ambient light. That is why i designed this....
This voltage-controlled oscillator circuit is very compact and has a good linearity. The author said that the precision could be better than 0. 01% If this circuit is properly constructed. Moreover, this circuit gives three different output waveforms:....
This cahrger based on chargeing voltage 2, 4 Volts per cell, in accordance with most manufacterers recomendation. This circuit pulses the battery under with 14. 4 Volts ( 6 cells x 2, 4 volts per cell) at a rate 120 Hz. You are reading the Circuits of....
A sensitive and reliable rf field strength meter is an invaluable instrument in amateur radio and in radio controlled model area. A field strength meter is...
The circuit is shown as the chart. It is a control circuit which composed of infrared specific integrated circuit KC778B and KC778B is the center of the circuit. It s surrounded by a pyroelectric infrared sensor head PIR, light control and light control....
Do you drive an older car without an automatic "lights-on" warning circuit If so, you`ve probably accidentally left the lights on and flattened the battery on one or more occasions. This headlights reminder circuit will prevent that. It`s more complicated....
An increasing number of appliances draw a very small current from the power supply. If you need to design a mains powered device, you could generally choose between a linear and a switch-mode power supply. However, what if the appliance`s total power....
this is an upgrade circuit from Simple Volume Unit Display Circuit Diagram 1 with more addition power for the audio input.. Component: Resistor, ....
The following circuit schemes the Ford Probe Single Wire Door Alarm System. This Single Door Locking Wire controls both LOCK and UNLOCK which means the pulse wires have to be connected to the same vehicle wire. The system is basically uses a single wire ( )....
For our second build in the Make It Last Build Series, we`re constructing a robotic plant. This week, we`re going to put together the brains of the machine, which we will use in the coming weeks to bring our plant to life. This basic circuit will have....
If a transistor junction operating in Zener breakdown is used as a noise source, the amplitude of the noise signal is asymmetric. This problem can be solved by using two transistors as two independent noise sources. One of these has a series resistor to....
This chapter contains circuit diagrams for several power supplies for pulsed solid state lasers. These include units suitable for driving the popular Hughes ruby and YAG rangefinder laser assemblies as well, one using the flash from a disposable pocket....
