New Circuits Page 129
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Here is the 22 watt stereo audio power amplifier circuit diagram based on TDA1554 and integrated circuit from NXP semiconductors (formerly PHILIPS semiconductors). It is very simple and useful circuit for amplify the stereo signals. The circuit dissipates....
-
This setup is quite messy in terms of wires, so I`ve decided to remove both from their respective housings and place them in a nice, custom-built box. Right, so while I`m about to do that, aren`t there any other goodies toadd, like a VU meter and volume....
-
Above circuit shows Temperature to Digital Converter diagram using this LM35 sensor with a useful bypass capacitor from VIN to ground and a series RC damper..
-
IC TDA7052 is a mono output amplifier in 8-comng Head DI package (DIP). The device is designed primarily for battery-operated portable audio circuits. Features include TDA 7052, no external components needed, no switch-on or switch-off button sounds great....
-
Many RC oscillators use the advanced circuits in the phase shift unit. They use the voltage feedback amplifier, and the gain of the voltage feedback amplifier will reduce sharply in the high frequency, and gain will stop, when it has not reached the high....
-
-
-
The TEM that we have, the Jeol 2000fx is equipped with two extra detectors, one secondary electron detector, i. e. SEM imaging, as well as a STEM detector at the bottom of the microscope. Because the system are from the 80`s the imaging from these detectors....
-
Going camping nowadays involves demography lots of cyberbanking accessories whether for day to day active or for fun and entertainment. Most of the time a answerable advance acerbic array and a ability inverter would be acclimated to ensure a calmly....
-
In addition to using the LA3600 IC, was the 5 channel graphic equalizer. We can also be designed was the 10 Channel Graphic equalizer circuit. By connection....
-
With the help of high gain high impedance operational amplifier, we can build a long time delay with resistor-capacitor (RC) circuit since it allow high....
-
-
A very simple and easy telephone line tester circuit or telephone line checker circuit which can be used for testing telephone lines. ....
-
an FM modulator that modulate a carrier frequency with the composite signal, and an RF amplifier that provide enough power to be transmitted through antenna. Here is the schematic diagram of theFM transmitter circuit: The core of this stereo FM tra....
-
Class D amplifier for ATtiny15L microcontroller circuit diagram. These units can get acquainted with one embodiment of the amplifier is Class D. Controller ATtiny15L AVR family firm Atmel is perfectly suited for this purpose, because it contains a ten-digit....
-
This is a remote control Circuit that uses radio frequency electrical signal to control a variety of applications. Component: Transistor, ....
-
This circuit is the result of Andy Collinson research. He has used a photodiode, SFH2030 as an infra red sensor. A MOSFET opamp, CA3140 is used in the differential mode to amplify the pulses of current from the photodiode. LED1 is an ordinary coloured led....
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-
Also called the parallel A/D converter, this circuit is the simplest to understand. It is formed of a series of comparators, each one comparing the....
-
This antenna amplifier is very useful for 35kHz-150Mhz frequency band. This antenna amplifier circuit is based on transistors and has a low 3dB non-linearity and a high gain of 43 dB. The input and output impedance for this rf amplifier is 75 ohms. All used....
-
The power line fluctuations and cut-offs cause damages to electrical appliances connected to the line. It is more serious in the case of domestic appliances like fridge and air conditioners. If a fridge is operated on low voltage, excessive current flows....
-
This is a simple siren sound that high power output and very noisy. ICs, Digital ICs are easy to use number CD4046 Inverter circuit and four transistor power increase current out to horn speaker 20 watt 4ohm 8ohm. Operation of the circuit when the circuit is....
-
Portable loads such as video cameras, halogen flood lights, electrical irons, hand drillers, grinders, and cutters are powered by connecting long 2- or 3-core cables to the mains plug. Due to prolonged usage, the power cord wires are subjected to mechanical....
-
It is located in the LHC underground installation, close to the loads to limit cable losses in the underground installation. A high current switch mode power converter, designed for powering of superconducting loads requiring only positive current and....
-
-
Although 60/40 solder melts at about 200°C, the tip temperature of a soldering iron should be at about 370°C. This is necessary to make a good quick joint, without the risk of overheating delicate components because the iron has to be kept on the joint....
-
-
You would calculate power through each headphone for the given source impedance to find which is louder. Chances are that the source impedance is closer to 32 ohms than 250 ohms, and the low impedance headphone would be louder, but it isn`t a sure thing....
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-
-
If you have an application in which a MOSFET is already used to switch a load, it is relatively easy to add short-circuit or overload protection. Here we make use of the internal resistance RDS(ON), which produces a voltage drop that depends on the amount of....
-
-
Simple digital frequency meter has many applications. It may be an experiment for beginners, laboratory equipment or a meter built into some device. Ideal wherever there is a need to measure and digitally display the frequency. Circuit The frequency meter is....
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Expensive stereo is general often have VU meter come to and for help show max power the stereo not too much. For radio tape general plaything has will no VU Meter. I then think to seek Multi meter use can replace. By use Range 100uA and electronics equipment....
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I built the LM386 amplifier section, and it pretty much works. I purchased a five-conductor headphone jack, which passes the left and right channels through to the mono amplifier section when nothing is plugged in, but disconnects the amplifier section when....
-
This is a circuit of Audio Decibel Level Meter. This circuit uses the SA604 which not only designed as an RF device but also the Received Signal Strength Indicator (RSSI). In a cellular radio, the radio`s microcomputer uses that function to monitor the....
-
One method of controlling power to ac circuits uses a triac to turn the power on and off at precisely timed intervals that are synchronized with the ac signal. This method is called AC phase control. It is the method used in many light dimmer and heater....
-
This simple circuit can give regulated 4. 7 volts for charging a mobile phone. USB outlet can give 5 volts DC at 100mA current which is sufficient for the slow charging of mobile phones. Most of the Mobile Phone batteries are rated 3. 6 volts at 1000 to 1300....
-
This MOT`s LSI is very suitable for designing ham rigs` VFO, which has 4 digit BCD preset counters from 3 to 3999. And also there is standard Xtal frequency oscillator and preset dividers. This LSI`s input nodes are pull down in the LSI. You should supply 5V....
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The circuit shown here is that of the IC controlled emergency light. Its main features are: automatic switching-on of the light on mains failure and battery charger with overcharge protection. When mains is absent, relay RL2 is in deenergised state, feeding....
-
-
The 203 Theremin utilizes Wien-bridge oscillators in a heterodyne configuration to produce an audible tone that corresponds to hand position. The instrument provides the convenience and safety of 9-volt battery operation, in a compact enclosure. It is a....
-
-
The YD9088 is a bipolar integrated circuit for use in mono portable and pocket Radios It is used when a minimum of peripheral components (of small dimensions and low costs) is important. The circuit contains a frequency-locked-loop (FLL) system with an....
-
When the amplifier is switched on, the speaker gets popped up by a high voltage and you can hear a loud thud sound from the speaker. This stuff is very harmful to the speaker and it drastically reduces the speaker`s life. The circuit shown here connects the....
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-
High speed optocouplers technical parameters are: Rise time t1 ‰¤ 300ns; Circuit eye transfer ratio CTR = 50%; Isolation voltage VSO ‰¥ 15000V; Output transistor reverse breakdown voltage V (BR) CEO ‰¥ 50V. The optical coupler can be widely used for the....
-
Here is the circuit diagram of an easy to build long range AM transmitter circuit based on three transistors. With correct tuning and a matching antenna, the transmitter can deliver signals up to a distance of 2 kilometers. The audio signal to be transmitted....
-
This circuit switches a printer`s USB connection from a PC to a laptop. What was needed was a method of allowing a laptop to use the printer occasionally while at all other times the printer would be connected to the PC. Instead of unplugging the printer....
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-
-
The G9 project is an adaptation of the Gyratec IX dual microphone/line/DI preamplifier to suit the DIY`ers demands. Searching the net, I`ve never come across a complete tube microphone preamp design, so I decided to share this version of our very popular....
-
The Pyro Propeller Clock POV schematic is actually not very difficult. There are three main parts: the power supply which uses a 7805, the LED output control which uses the PIC18F252 and 74LS373 and the `home` trigger circuit which uses an IR emitter and....
-
4017 LED Knight Rider Running Light Circuit Diagram In this 4017 Knight Rider circuit, the 555 is wired as an oscillator. It can be adjusted to give....
-
A simple pulse generator with a variable duty cycle and frequency is often useful in the lab to trigger or test other devices, e. g a servo with a frequency of 50 Hz and pulses between 1 and 2 ms. This is where the project started but for reasons we see....
-
The transmitter circuit described here has an extra RF power amplifier stage, after the oscillator stage, to raise the power output to 200-250 milliwatts. With a good matching 50-ohm ground plane antenna or multi-element Yagi antenna, this transmitter can....
-
Following the same idea as the Chipstein and Cornell designs, the circuit uses an instrumentation amplifier (the AD620) to take the voltage difference between two spots on the body. A second amplifier (the CA3140) amplifies this differential signal. A....
-
The LinkSwitch-XT LNK363DN based‚ flyback power supply shown in Figure 1 generates a single isolated DC output voltage from a 90 VAC to 264 VAC input voltage range. The power supply output is 5 V, 550 mA (2. 75 W) constant-voltage/constant-current (CV/CC).....
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this is a circuit of Step-Down Charge Pump Regulator for USB Powered Devices. The critical design parameter of this circuit is the circuit area. To solve this....
-
Here is a simple and powerful LED based night lamp circuit that can be operated directly from the 230V mains supply. The are total 24 white LEDs used and the lamp produces an output of around 15W. The resistance R1 and capacitor C1 provides necessary current....
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USB Battery Charger For Lithium Ion battery with the LM3622 is a series of lithium ion battery charger. This charger circuit operates using power from the USB source computer. Current consumption of a series of with 400mA LM3622 is limited by R1, so it does....
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This is a very simple FM receiver which build based on one transistor only. No chip or another active component. The output is connected to earphones, you need an amplifier circuit if you want to listen the radio with a loudspeaker. ..
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The build makes use of a 10 x 20 grid of RGB LEDs controlled by the myRIO. It`s played by using a web interface on any device, as long as you have WebSockets support. [Sam] had originally built it using an Arduino at the heart, but wanted a stand-alone....
-
-
This page identifies all the hardware modifications necessary to adapt a Kenwood TK-931 transceiver for operation as a 2 watt exciter for 927 MHz repeater service. Not shown here is the effort required to program the radio for the desired operating....
-
This a shows the overall circuit diagram of the power control unit. On the left, there is a main relais controlled by the key switch and the ....
-
-
This circuit breaks an input voltage signal down into its components: (1) the absolute value and (2) the polarity or ‘sign (+ or ). It will handle direc....
-
-
Welcome to the weblog where we discuss about electronic circuits schematics, PCB design, diy kits and electronic projects diagrams. Here is the circuit diagram of a magnetic proximity switch that finds a lot of applications in abounding fields. The ambit is....
-
-
The following circuit shows about 2500W Phase Control Circuit Schematic. Features: tied to ground trigger output disabled, ow voltage input to ....
-
This audio distribution electronic project circuit diagram is designed using the TL064 or TL06 operational amplifiers and some other common electronic parts. ..
-
Build a preamp that I want to use to take a 1/4" keyboard line level signal and drive a Leslie 147 amplifier with it. I want to build the preamp using a 12AX7 and 12BH7 based on the design of a Hammond Organ preamp. Here is the schematic to the Hammond AO-28....
-
This circuit includes micro vibration sensor, trigger delay circuit and control circuit, the figure is as shown. The micro vibration sensor contains vibration sensor device and high power amplifier circuit, it can induce very weak external vibration signal,....
-
The Sound Blaster MIDI port uses two pins from the 15 pin joystick port. These normally would be redundant +5 volt and ground lines. In the Sound Blaster, there are called MIDI TXD (Transmit eXternal Data) and MIDI RXD (Receive eXternal Data). The signals to....
-
Here is the design of an audio oscillator that runs at approximately 1 KHz. I don`t remember where I got this circuit, probably from EMFRD, since Wes`s book is a treasure trove of useful circuits. This handy oscillator can be used as a source of audio for....
-
J1 And J2 are a matched pair of J310`s (can also use U310`s or a U431 matched pair). R2 is selected to bias the 2 FETs with a small drain current with no RF input. The turns ratio of the input transformer is selected for an approximate 50 ohm impedance match....
-
This is Overheat Detector Alarm Switch using Temperature Sensor IC LM35 Electronic Suite Diagram, at the heart of this overhead detector (fire alarm) circuit is a precision integrated temperature sensor type LM35 (IC1), which provides an accurately linear....
-
Automatic cooler fan for amplifiers is a circuit introduced for the purpose of saving power in amplifier circuits. This circuit switches ON...
-
The TRW-24G connector pins is too small (~1mm pin to pin). For that I order the adaptor PCB that is convert the small connector of RF module, to standard pin connector. The pin order of RF modules in schematic diagram is based on pin order of pin adaptor,....
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-
-
-
A faster driver can supply higher peak gate current to switch the VN64GA very quicklyThe circuit uses a VMOS totempole stage to drive the high power switch..
-
The phone is a Siemens S65. The official charger that came with the phone says 5V at 420mA. Because these things do not always actually deliver what is printed on them I measured the voltage myself. This is actually quite hard with the tiny contacts on the....
-
The present circuit is intended to convert sinusoidal input signals to TTL output signals. It can handle inputs of more than 100 mV and is suitable for use at frequencies up to about 80 MHz. Transistor T1, configured in a common-emitter circuit, is biased by....
-
-
A phase-locked-loop (PLL) is a servo system, or, in other words, a feedback loop that operates with frequencies and phases. PLL`s are well known to be quite useful (powerful, in fact) in communications systems, where they can pluck tiny signals out of large....
-
-
This light sensor switch circuit allows the automatic connection of a lamp when the light is low (at nightfall) and will maintain the lamp ON for a certain period of time. From the moment that T4 and T5 are opened, relay`s LED start to light and powers the....
-
This type of circuit can never be used in a load-share configuration Synchronous rectification is one of the best ways to improve the efficiency of the low-voltage....
-
F232 is USB powered, but you need to have a level translator at the output of F232. Tx of f232 has to be converted to RS232 levels, since the other side has a max. Receive pin can be easily opto-ed. But the transmit pin, need to have a supply in line with....
-
I want to build a voice sound recording circuit that when triggered will play it recorded sound through an amplifier circuit....
-
Here is the circuit diagram of an FM transmitter using the IC UPC1651. UPC1651 is a wide band UHF Silicon MMIC amplifier. The IC has a broad frequency response to 1200MHz and power gain up to 19dB. The IC can be operated from 5V DC. The audio signals picked....
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The Camera Head (A2075) is a LWDAQ Device that controls and reads out a single ICX424 image sensor. The circuit provides a socket into which we can solder the sixteen-pin sensor directly. It provides a twelve-way flex socket to which an auxiliary board....
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hi, i am using YENKA to diagram circuits. i dont get what it is doing when working out voltages in a basic series circuit. the picattached showsthe....
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This small circuit transmitter processes the signs of audio of a table or microphone, and the signs of video of a camera, or still the audio signs and video of a DVD, Video-cassette or even it sweats her video plate has an exit of composed video, you can....
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The RF amplifiers use noiseless feedback through the drain-gate capacitance with an inductor in the source lead to provide the necessary 90 degree phase shift between gate voltage and channel current. The first RF amplifier gives about 4dB gain with a noise....
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Diagram shows the basic construction of a forward converter. Whereas the energy is temporarily stored with the flyback converter before it is transferred to the secondary side, in the forward converter, energy is transferred directly between the primary and....
Here is the 22 watt stereo audio power amplifier circuit diagram based on TDA1554 and integrated circuit from NXP semiconductors (formerly PHILIPS semiconductors). It is very simple and useful circuit for amplify the stereo signals. The circuit dissipates....
This setup is quite messy in terms of wires, so I`ve decided to remove both from their respective housings and place them in a nice, custom-built box. Right, so while I`m about to do that, aren`t there any other goodies toadd, like a VU meter and volume....
Above circuit shows Temperature to Digital Converter diagram using this LM35 sensor with a useful bypass capacitor from VIN to ground and a series RC damper..
IC TDA7052 is a mono output amplifier in 8-comng Head DI package (DIP). The device is designed primarily for battery-operated portable audio circuits. Features include TDA 7052, no external components needed, no switch-on or switch-off button sounds great....
Many RC oscillators use the advanced circuits in the phase shift unit. They use the voltage feedback amplifier, and the gain of the voltage feedback amplifier will reduce sharply in the high frequency, and gain will stop, when it has not reached the high....
The TEM that we have, the Jeol 2000fx is equipped with two extra detectors, one secondary electron detector, i. e. SEM imaging, as well as a STEM detector at the bottom of the microscope. Because the system are from the 80`s the imaging from these detectors....
Going camping nowadays involves demography lots of cyberbanking accessories whether for day to day active or for fun and entertainment. Most of the time a answerable advance acerbic array and a ability inverter would be acclimated to ensure a calmly....
In addition to using the LA3600 IC, was the 5 channel graphic equalizer. We can also be designed was the 10 Channel Graphic equalizer circuit. By connection....
With the help of high gain high impedance operational amplifier, we can build a long time delay with resistor-capacitor (RC) circuit since it allow high....
A very simple and easy telephone line tester circuit or telephone line checker circuit which can be used for testing telephone lines. ....
an FM modulator that modulate a carrier frequency with the composite signal, and an RF amplifier that provide enough power to be transmitted through antenna. Here is the schematic diagram of theFM transmitter circuit: The core of this stereo FM tra....
Class D amplifier for ATtiny15L microcontroller circuit diagram. These units can get acquainted with one embodiment of the amplifier is Class D. Controller ATtiny15L AVR family firm Atmel is perfectly suited for this purpose, because it contains a ten-digit....
This is a remote control Circuit that uses radio frequency electrical signal to control a variety of applications. Component: Transistor, ....
This circuit is the result of Andy Collinson research. He has used a photodiode, SFH2030 as an infra red sensor. A MOSFET opamp, CA3140 is used in the differential mode to amplify the pulses of current from the photodiode. LED1 is an ordinary coloured led....
Also called the parallel A/D converter, this circuit is the simplest to understand. It is formed of a series of comparators, each one comparing the....
This antenna amplifier is very useful for 35kHz-150Mhz frequency band. This antenna amplifier circuit is based on transistors and has a low 3dB non-linearity and a high gain of 43 dB. The input and output impedance for this rf amplifier is 75 ohms. All used....
The power line fluctuations and cut-offs cause damages to electrical appliances connected to the line. It is more serious in the case of domestic appliances like fridge and air conditioners. If a fridge is operated on low voltage, excessive current flows....
This is a simple siren sound that high power output and very noisy. ICs, Digital ICs are easy to use number CD4046 Inverter circuit and four transistor power increase current out to horn speaker 20 watt 4ohm 8ohm. Operation of the circuit when the circuit is....
Portable loads such as video cameras, halogen flood lights, electrical irons, hand drillers, grinders, and cutters are powered by connecting long 2- or 3-core cables to the mains plug. Due to prolonged usage, the power cord wires are subjected to mechanical....
It is located in the LHC underground installation, close to the loads to limit cable losses in the underground installation. A high current switch mode power converter, designed for powering of superconducting loads requiring only positive current and....
Although 60/40 solder melts at about 200°C, the tip temperature of a soldering iron should be at about 370°C. This is necessary to make a good quick joint, without the risk of overheating delicate components because the iron has to be kept on the joint....
You would calculate power through each headphone for the given source impedance to find which is louder. Chances are that the source impedance is closer to 32 ohms than 250 ohms, and the low impedance headphone would be louder, but it isn`t a sure thing....
If you have an application in which a MOSFET is already used to switch a load, it is relatively easy to add short-circuit or overload protection. Here we make use of the internal resistance RDS(ON), which produces a voltage drop that depends on the amount of....
Simple digital frequency meter has many applications. It may be an experiment for beginners, laboratory equipment or a meter built into some device. Ideal wherever there is a need to measure and digitally display the frequency. Circuit The frequency meter is....
Expensive stereo is general often have VU meter come to and for help show max power the stereo not too much. For radio tape general plaything has will no VU Meter. I then think to seek Multi meter use can replace. By use Range 100uA and electronics equipment....
I built the LM386 amplifier section, and it pretty much works. I purchased a five-conductor headphone jack, which passes the left and right channels through to the mono amplifier section when nothing is plugged in, but disconnects the amplifier section when....
This is a circuit of Audio Decibel Level Meter. This circuit uses the SA604 which not only designed as an RF device but also the Received Signal Strength Indicator (RSSI). In a cellular radio, the radio`s microcomputer uses that function to monitor the....
One method of controlling power to ac circuits uses a triac to turn the power on and off at precisely timed intervals that are synchronized with the ac signal. This method is called AC phase control. It is the method used in many light dimmer and heater....
This simple circuit can give regulated 4. 7 volts for charging a mobile phone. USB outlet can give 5 volts DC at 100mA current which is sufficient for the slow charging of mobile phones. Most of the Mobile Phone batteries are rated 3. 6 volts at 1000 to 1300....
This MOT`s LSI is very suitable for designing ham rigs` VFO, which has 4 digit BCD preset counters from 3 to 3999. And also there is standard Xtal frequency oscillator and preset dividers. This LSI`s input nodes are pull down in the LSI. You should supply 5V....
The circuit shown here is that of the IC controlled emergency light. Its main features are: automatic switching-on of the light on mains failure and battery charger with overcharge protection. When mains is absent, relay RL2 is in deenergised state, feeding....
The 203 Theremin utilizes Wien-bridge oscillators in a heterodyne configuration to produce an audible tone that corresponds to hand position. The instrument provides the convenience and safety of 9-volt battery operation, in a compact enclosure. It is a....
The YD9088 is a bipolar integrated circuit for use in mono portable and pocket Radios It is used when a minimum of peripheral components (of small dimensions and low costs) is important. The circuit contains a frequency-locked-loop (FLL) system with an....
When the amplifier is switched on, the speaker gets popped up by a high voltage and you can hear a loud thud sound from the speaker. This stuff is very harmful to the speaker and it drastically reduces the speaker`s life. The circuit shown here connects the....
High speed optocouplers technical parameters are: Rise time t1 ‰¤ 300ns; Circuit eye transfer ratio CTR = 50%; Isolation voltage VSO ‰¥ 15000V; Output transistor reverse breakdown voltage V (BR) CEO ‰¥ 50V. The optical coupler can be widely used for the....
Here is the circuit diagram of an easy to build long range AM transmitter circuit based on three transistors. With correct tuning and a matching antenna, the transmitter can deliver signals up to a distance of 2 kilometers. The audio signal to be transmitted....
This circuit switches a printer`s USB connection from a PC to a laptop. What was needed was a method of allowing a laptop to use the printer occasionally while at all other times the printer would be connected to the PC. Instead of unplugging the printer....
The G9 project is an adaptation of the Gyratec IX dual microphone/line/DI preamplifier to suit the DIY`ers demands. Searching the net, I`ve never come across a complete tube microphone preamp design, so I decided to share this version of our very popular....
The Pyro Propeller Clock POV schematic is actually not very difficult. There are three main parts: the power supply which uses a 7805, the LED output control which uses the PIC18F252 and 74LS373 and the `home` trigger circuit which uses an IR emitter and....
4017 LED Knight Rider Running Light Circuit Diagram In this 4017 Knight Rider circuit, the 555 is wired as an oscillator. It can be adjusted to give....
A simple pulse generator with a variable duty cycle and frequency is often useful in the lab to trigger or test other devices, e. g a servo with a frequency of 50 Hz and pulses between 1 and 2 ms. This is where the project started but for reasons we see....
The transmitter circuit described here has an extra RF power amplifier stage, after the oscillator stage, to raise the power output to 200-250 milliwatts. With a good matching 50-ohm ground plane antenna or multi-element Yagi antenna, this transmitter can....
Following the same idea as the Chipstein and Cornell designs, the circuit uses an instrumentation amplifier (the AD620) to take the voltage difference between two spots on the body. A second amplifier (the CA3140) amplifies this differential signal. A....
The LinkSwitch-XT LNK363DN based‚ flyback power supply shown in Figure 1 generates a single isolated DC output voltage from a 90 VAC to 264 VAC input voltage range. The power supply output is 5 V, 550 mA (2. 75 W) constant-voltage/constant-current (CV/CC).....
this is a circuit of Step-Down Charge Pump Regulator for USB Powered Devices. The critical design parameter of this circuit is the circuit area. To solve this....
Here is a simple and powerful LED based night lamp circuit that can be operated directly from the 230V mains supply. The are total 24 white LEDs used and the lamp produces an output of around 15W. The resistance R1 and capacitor C1 provides necessary current....
USB Battery Charger For Lithium Ion battery with the LM3622 is a series of lithium ion battery charger. This charger circuit operates using power from the USB source computer. Current consumption of a series of with 400mA LM3622 is limited by R1, so it does....
This is a very simple FM receiver which build based on one transistor only. No chip or another active component. The output is connected to earphones, you need an amplifier circuit if you want to listen the radio with a loudspeaker. ..
The build makes use of a 10 x 20 grid of RGB LEDs controlled by the myRIO. It`s played by using a web interface on any device, as long as you have WebSockets support. [Sam] had originally built it using an Arduino at the heart, but wanted a stand-alone....
This page identifies all the hardware modifications necessary to adapt a Kenwood TK-931 transceiver for operation as a 2 watt exciter for 927 MHz repeater service. Not shown here is the effort required to program the radio for the desired operating....
This a shows the overall circuit diagram of the power control unit. On the left, there is a main relais controlled by the key switch and the ....
This circuit breaks an input voltage signal down into its components: (1) the absolute value and (2) the polarity or ‘sign (+ or ). It will handle direc....
Welcome to the weblog where we discuss about electronic circuits schematics, PCB design, diy kits and electronic projects diagrams. Here is the circuit diagram of a magnetic proximity switch that finds a lot of applications in abounding fields. The ambit is....
The following circuit shows about 2500W Phase Control Circuit Schematic. Features: tied to ground trigger output disabled, ow voltage input to ....
This audio distribution electronic project circuit diagram is designed using the TL064 or TL06 operational amplifiers and some other common electronic parts. ..
Build a preamp that I want to use to take a 1/4" keyboard line level signal and drive a Leslie 147 amplifier with it. I want to build the preamp using a 12AX7 and 12BH7 based on the design of a Hammond Organ preamp. Here is the schematic to the Hammond AO-28....
This circuit includes micro vibration sensor, trigger delay circuit and control circuit, the figure is as shown. The micro vibration sensor contains vibration sensor device and high power amplifier circuit, it can induce very weak external vibration signal,....
The Sound Blaster MIDI port uses two pins from the 15 pin joystick port. These normally would be redundant +5 volt and ground lines. In the Sound Blaster, there are called MIDI TXD (Transmit eXternal Data) and MIDI RXD (Receive eXternal Data). The signals to....
Here is the design of an audio oscillator that runs at approximately 1 KHz. I don`t remember where I got this circuit, probably from EMFRD, since Wes`s book is a treasure trove of useful circuits. This handy oscillator can be used as a source of audio for....
J1 And J2 are a matched pair of J310`s (can also use U310`s or a U431 matched pair). R2 is selected to bias the 2 FETs with a small drain current with no RF input. The turns ratio of the input transformer is selected for an approximate 50 ohm impedance match....
This is Overheat Detector Alarm Switch using Temperature Sensor IC LM35 Electronic Suite Diagram, at the heart of this overhead detector (fire alarm) circuit is a precision integrated temperature sensor type LM35 (IC1), which provides an accurately linear....
Automatic cooler fan for amplifiers is a circuit introduced for the purpose of saving power in amplifier circuits. This circuit switches ON...
The TRW-24G connector pins is too small (~1mm pin to pin). For that I order the adaptor PCB that is convert the small connector of RF module, to standard pin connector. The pin order of RF modules in schematic diagram is based on pin order of pin adaptor,....
A faster driver can supply higher peak gate current to switch the VN64GA very quicklyThe circuit uses a VMOS totempole stage to drive the high power switch..
The phone is a Siemens S65. The official charger that came with the phone says 5V at 420mA. Because these things do not always actually deliver what is printed on them I measured the voltage myself. This is actually quite hard with the tiny contacts on the....
The present circuit is intended to convert sinusoidal input signals to TTL output signals. It can handle inputs of more than 100 mV and is suitable for use at frequencies up to about 80 MHz. Transistor T1, configured in a common-emitter circuit, is biased by....
A phase-locked-loop (PLL) is a servo system, or, in other words, a feedback loop that operates with frequencies and phases. PLL`s are well known to be quite useful (powerful, in fact) in communications systems, where they can pluck tiny signals out of large....
This light sensor switch circuit allows the automatic connection of a lamp when the light is low (at nightfall) and will maintain the lamp ON for a certain period of time. From the moment that T4 and T5 are opened, relay`s LED start to light and powers the....
This type of circuit can never be used in a load-share configuration Synchronous rectification is one of the best ways to improve the efficiency of the low-voltage....
F232 is USB powered, but you need to have a level translator at the output of F232. Tx of f232 has to be converted to RS232 levels, since the other side has a max. Receive pin can be easily opto-ed. But the transmit pin, need to have a supply in line with....
I want to build a voice sound recording circuit that when triggered will play it recorded sound through an amplifier circuit....
Here is the circuit diagram of an FM transmitter using the IC UPC1651. UPC1651 is a wide band UHF Silicon MMIC amplifier. The IC has a broad frequency response to 1200MHz and power gain up to 19dB. The IC can be operated from 5V DC. The audio signals picked....
The Camera Head (A2075) is a LWDAQ Device that controls and reads out a single ICX424 image sensor. The circuit provides a socket into which we can solder the sixteen-pin sensor directly. It provides a twelve-way flex socket to which an auxiliary board....
hi, i am using YENKA to diagram circuits. i dont get what it is doing when working out voltages in a basic series circuit. the picattached showsthe....
This small circuit transmitter processes the signs of audio of a table or microphone, and the signs of video of a camera, or still the audio signs and video of a DVD, Video-cassette or even it sweats her video plate has an exit of composed video, you can....
The RF amplifiers use noiseless feedback through the drain-gate capacitance with an inductor in the source lead to provide the necessary 90 degree phase shift between gate voltage and channel current. The first RF amplifier gives about 4dB gain with a noise....
Diagram shows the basic construction of a forward converter. Whereas the energy is temporarily stored with the flyback converter before it is transferred to the secondary side, in the forward converter, energy is transferred directly between the primary and....
