New Circuits Page 183
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This 3 band equalizer circuit is an active filter network for bass, mid and high audio ranges. It is designed around the LM833 opamp from National Semiconductors. This opamp IC has the following charactersistics: very low noise figure, wide....
-
This electronic rf detector electronic project is designed using common transistors and other few common electronic parts. This rf detector responds to RF signals bellow the standard broadcast band to well over 500 MHz and provides an visual, and audible....
-
A different circuit of electronic lock very simple, one and does not need a lot of materials in order to it is manufactured....
-
This circuit was designed as an aid in parking the car near the garage wall when backing up. Electronics project and circuit diagram. Proximity sensor..
-
-
-
Motorola VWA63 Auto Radio is an automotive type all-transistor superheterodyne AM radio for standard broadcast reception. The following schematic illustrates....
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A vco using the LM324. I have the schematic to the korg monotron, which uses the lm324 as the IC for the vco, but I am struggling to create a simple circuit in which the lm324 will produce an audible wave form when connected to a speaker. can anyone help....
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In the first installment of this two-part article on paralleling eGaN FETs, five basic designs, utilizing four EPC2001 (100 V, 25 A) paralleled devices per switch in a half bridge configuration were presented with experimental validation. In this second....
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High Voltage Stun Gun Disclaimer: As i have seen before, IT IS NOT A TOY, DON`T DO ANYTHING STUPID WITH IT. I DON`T ACCEPT ANY RESPONSIBILITY OF DAMAGES DONE TO OTHER PEOPLE OR YOURSELF WITH THIS DEVICE. IF YOU WANT TO BUILD IT YOU MUST ACC....
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-
This is a simple update to Mr. Hareendran`s PIR Sensor Security Light circuit. It has a shortcoming limits the relay voltage to approximately 3. 3V. While this may function with some 5V relays, it will not function with all. The nature of an emitter follower....
-
This is simple 3-digits digital volt meter.PIC16F676 used to read analog signal(voltage) and display the value on 3-digits 7-segment. You can apply similar principles to measure DC current with parallel R shunt..
-
The first reverberator we present is based on TDA1022, the most used BBD. Reverberator adjustements for proper functionality Before we connect the power su....
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-
-
-
For many years now, magnetic (or electromagnetic) water descaler devices have been showing up on the shelves of Home Improvement and other DIY stores all over Europe. Despite the numerous studies completed on that subject, by manufacturers as well as by....
-
This is The Fet Amplifier circuit. This circuit uses FET transistor. The gate of the FET must be negative with respect to the source, so a bias can be achieved in the following manner. The voltage that is across the source resistor is developed by the drain....
-
Christmas is coming and its that time of the year again when the electronics student or hobbyists thoughts turn to making a Christmas circuit for their home and especially one that flashes a few lights. There are many circuits and kits on the market that can....
-
This is for all the spies/paranoid people out there. An essential piece of equipment for any spy is an Electronic Bug Detector. You never know what go....
-
This is a low power voltmeter circuit that can be used with alternative energy systems that run on 12 and 24 volt batteries. The voltmeter is an expanded scale type that indicates small voltage steps over the 10 to 16 volt range for 12 volt batteries and....
-
-
Figure shows the V-I curve for a typical solar panel (Sharp ND-224U1F), and output power under different lighting conditions. The solar panel behaves like a constant current source at high current, and like a voltage source at low current. The transition....
-
Pure sine wave inverters are best, however they are expensive to buy or build. Modified sine wave inverters will power some equipment square wave inve....
-
This circuit is an Electronic Locker. It is controlled by a switches combination (by a code). There is a switch matrix on the door of the locker. This one is a unit of switches connected into 4 arranged of 4 columns for a total of eight terminals. When we....
-
This is a modified version of the first SSTC I built, the Kaizer SSTC I. It uses the same secondary, topload and driver board. New things is a full bridge of IRFP460 MOSFETs, audio modulation, shielded drivers and a new casing. I took apart a 19 ³ LCD....
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The input signal it is applied to a gate G and then to a counter, for a precisely period of time After this period of time, the input signal it is stopped for a while and then the cycle it is repeated. In the time of break the content of counter it is....
-
This siren alarm circuit diagram is based on a specialized IC UM3561, which is a low power CMOS LSI specially designed for this type of applications. The UM3561 contains all needed parts ( oscillator, selector circuits, programmed mask ROM ) to simulate....
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This sine wave generator is adjustable between 15 Hz to 150 kHz. The circuit is basically a Wien-bridge oscillator, with multiple capacitor selection. Here is...
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The diagram is lamp dimmer which has the function of light gradually, gradually eliminate. It does not appear the light stimulation of the human eye when the lights suddenly illuminated, and also can reduce the damage when open lamp impact current to the....
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I have some Tektronix oscilloscopes with appropriate plug in units yielding an four channel display, I always wanted something else: A true four channel oscilloscope with four distinct X/Y inputs which would allow me not only to display four traces with a....
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The circuit shown here is a simple stereo FM transmitter that can transmit signals of high quality with a range of 70 feet. The circuit is based on BH1417 PLL Stereo Transmitter IC semiconductor Rhom. The IC has separate sections of audio processing for the....
-
The MicroCC uses the Touchstone Semiconductor TSM6025 voltage reference, a drop-in replacement for the MAX6025, with better than 15ppm/ºC stability. This is an....
-
Thesis by Rafael Bräg at the University of Canterbury, New Zealand in cooperation with the Universität Karlsruhe, Institut Elektrotechnik und Hochspannungstechnik....
-
A 40 watt fluorescent (tube lamp, TL) or two 20-watt tubes in series will be driven by this circuit. The transformer is wound on a ferrite rod 10mm dia and 8cm....
-
Commonly used 3-pin linear voltage regulators, for example the LM317, cannot handle input voltages in excess of about 30V. The LR8A from Supertex Inc is a new, adjustable three pin regulator that can accept input voltages up to 450V and can supply an output....
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Circuit above shows a circuit diagram of the Clock Controller V1.1. P3.0-P3.3 also drives a base pin of 4-PNP transistor, 2n2907 with sink current ....
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This is simply (4) 1N4148 diodes connected in series with a thermal anticipation resistor (R1) heat shrunk together at the end of a (3) wire signal cable ”it is visible on some of the photos. The use of a thermal anticipation resistor is an old HVAC....
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Any type of flashing light on the main brake lights is prohibited and illegal in most states of the U. S. A. I`m verifying for the same here in Canada. In the mean time, use this circuit at your own risk and be aware that the possibility exists to be stopped....
-
The AN7147 Dual 5. 3-watt Audio Power Amplifier from Panasonic is listed as a replacement type` so hopefully will be around for some time to come. Together with some extra components, it can represent a simple surround-sound system requiring no opamps or a....
-
We know that astable multivibrator is simply an oscillator circuit that produces continuous pulses without the help of any external triggering. The oscillation frequency and time period can be manually controlled through simple modification of resistors and....
-
The Amstrad CPC 464 was released in 1984 and discontinued in 1990. It was possible to purchase a CPC 464 with a green screen (GT64) as well as with the standard colour screen (CTM640). Like most 8bits computers, the CPC has it`s OS (aka Firmware ) and a....
-
My task for the system was to implement and program all the hardware devices and make data available to the receiver program running on the PC. This includes the configuration of all Prospeckz devices and implementing protocols for radio transmissions....
-
It uses very common building blocks. The high voltage power supply is a classical oscillator circuit used in many places where a low current and high voltage is needed. TR is a step-up transformer salvaged from a xenon light circuit. You can find simmilar....
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-
This circuit can control any one out of 16 devices with the help of two push-to-on switches. An up/down counter acts as a master-controller for the system. A visual indication in the form of LEDs is also available. IC1 (74LS193) is a presettable up/ down....
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The white feedthroughs are for the attachment of the RF high voltage to the D`s (not shown). The copper pipe normal to the pipe is the vacuum line. The D`s have screw posts on the side for attachment to the RF power supply leads (curled copper wire). You can....
-
A video and the circuit with schematics for connecting and controlling the world`s smallest linear actuator based on a bipolar stepper motor from a Bluray drive...
-
For those are not into electronics, you must know that an oscilloscope has basically only one timebase to move the spot horizontally from left to right with the same intensity. The vertical deviation is function to the input voltage. You understand....
-
The following circuit shows about Honda VT750C Ace Electrical Circuit Diagram. Features:745cc 52-degree, two 36mm constant velocity carburetors, ....
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-
The TMS320C5505 EVALUATION BOARD is specially desgined for developers in dsp field as well as beginners. The kit is designed in such way that all the possible features of the DSP will be easily used by the everyone. UART (Universal Asynchronous Receiver....
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-
Now, to perform LED blinking in varying speed, we are sure, that we need to somehow change the delay time of an LED to remain in ON and OFF stat. So the main funda is to change the argument to function delay with change in time that`s it. Here, first we....
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buzzer circuit, pic microcontroller, piezo buzzer is a computer chip. It is overkill for driving a piezo buzzer. It is certainly a very low power processor that is optimum for portable and small devices where battery power must be conserved....
-
This inexpensive FM radio receiver antenna booster uses the BF324 TO92 style pnp transistor in a grounded-base configuration. The circuit may be used as a....
-
Digital Code Lock with efficient hacking prevention from Brute Force etc. The basic user lock is of 5 Digits and Master Lock is of 10 digits so its not easy build Digital Code Lock Project Jaipur, Create Digital Lock Project jaipur, electronic code lock,....
-
A "video-digitiser" (also known as a "frame grabber") captures still pictures frames from a TV set, video camera, or video recorder, etc. , and forwards them to a computer for display, storage, or general manipulation. This document describes the MarkII....
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A trip unit is electrically connected in parallel with a current limiting polymer element in series with circuit breaker contacts to function as a shunt resistance for the polymer element. It becomes energized by transition of the polymer element to its high....
-
A dimmer is quite unusual in a caravan or on a boat. Here we describe how you can make one. So if you would like to be able to adjust the mood when you re....
-
-
This amplifier circuit has a pretty good quality. Of course the sound quality, although this one amplifier does not have a large output power but in terms of soft and loud voice that this amplifier can be unreliable. With a single IC capitalize MPC576H and....
-
-
One reason why commercial soldering stations are expensive is that, in general, they require the use of soldering irons with inbuilt temperature sensors, such as thermocouples. This circuit eliminates the need for a special sensor because it senses the....
-
This is a circuit diagram showing the random nature of LED 7 segment. In the diagram circuit IC1 - LM555, R1, R2 and C2 on the circuit a sensitive multi-Stable...
-
I had heard some stories in the past concerning how poorly the 555 ran below Vcc = 5V, so I embarked on an endeavor to see if I could improve operation. Th....
-
This infrared alarm barrier can be used to detect persons passing through doorways, corridors and small gates. The transmitter emits a beam of infrared light which is invisible to the human eye. The buzzer at the output of the receiver is activated when the....
-
For maximum efficiency, set MAX_STEPPERS equal to the number of stepper motors that you are controlling (but never more than 4). Motors are referred to by their indices 0, 1, 2 and 3. On the QCard there is a trade-off between the number of motors being....
-
2 versions. First is one based on your schematics, except that I`ve changed those smd capacitors for standard through hole ones. Second one is somewhat modified. I`ve excluded transformer and put in standard dc jack. Also, pic and display header are located....
-
Driving an LED, we covered the electronic theory of how to use a Power MOSFET to turn the LED On and Off via a digital signal. In this post, we are going to walk the reader step-by-step on how to wire-up the circuit on a breadboard. The Bread board is an....
-
The inverting input is held low through a 10K resistor when the circuit is powered on but not being used. Whenever a measurement is being made (including calibration measurements where IN is floating), that resistor is disconnected. The circuit is used to....
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This study is made possible by the availability of a motor potentiometer from All Electronics at small cost. The item is catalog number MPOT-10K, and costs $4. 00. It is manufactured by Alps, and the motor is marked MD157320, the body 725t 10BX2. The....
-
-
Using a the controlled-half-plus-fixed-half-wave phase control method, this circuit can regulate an 860 a watt lamp load from half to full power. This circuit....
-
Nearly all the existing designs I found used direct switching of the lights (with no software control in between) and contained manual potentiometers for light sensitivity and overall gain setting. Furthermore, I couldn`t find many references to the....
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The following circuit shows about Stepper motor controller. This circuit based on the PIC16F84A IC. Features: transistor is used to drive the ...
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-
U7 is a 6510 microprocessor. One of the features of the 6510 is a built in parallel I/O port (P0-P5). P3 - P5 control most of the cassette interface circuitry. P3 pin p6 of U7 outputs the write data signal to connector CN3 on pins E and 5. P4 is an input....
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This diy digital thermometer circuit can measure temperatures up to 150?C with an accuracy of ?1?C. The temperature is read on a 1V full scale-deflectio...
-
A friend of mine bought a fairly new (only a couple of years old) Fender 60W combo off a guy he knew for £5. The original owner had taken it to three different repair shops, and been told it wasn`t worth repairing. I told my mate it couldn`t be much, and....
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The LT3494/LT3494A are low noise boost converters with integrated power switch, Schottky diode and output disconnect circuitry. The parts use a novel* control technique resulting in low output voltage ripple as well as high ef ¬ciency over a wide load....
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Although the modular Portable Mixer design available on these web pages has become a hit for many amateurs, some correspondents required a much simpler device, mainly for mixing mono signals. This design should fulfil their needs, featuring three inputs with....
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The idea behind a capacitor bank is to charge up as much energy as possible to short circuit that energy through small coils, aluminium paper, steel wool, wire and a lot of other things that can conduct a electric current. The short circuit current is....
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Analysis of simple digital circuits means to determine how the circuit behaves, which is represented for its truth table. So, with this aim in mind, lets organise the analysis step by step (as explained in Unit 1. 3 ) : For instance, here you are the circuit....
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Some 20 years ago it was common to see small key-holders emitting an intermittent beep for a couple of seconds after its owner whistled. These devices contained a special purpose IC and therefore were not suited to home construction. The present circuit is....
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For all those who like to add stuff to there truck(thats about every body) im starting a thread JUST OF WIRING DIAGRAMs Before posting your diagram....
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The T5753 is a PLL transmitter IC which has been developed for the demands of RF low-cost transmission systems at data rates up to 32 kBaud. The transmitting frequency range is 310 MHz to 350 MHz. It CAN be used in both FSK and ASK systems. By ATMEL....
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You can use a Cmos 4001 or a Cmos 4011 in this circuit. They have four - two-input - gates. In each case - the two inputs are joined together. So the gates are being used as simple inverters. = This means that when the two inputs are high - the output will....
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This post answers the question, ""How to use interrupt based UART in PIC16F877"" ? Also, using PIC16 simulator (Proteus) you can verify this UART code and ch....
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If you build fused-filament-fabrication parts (the technology that RepRap uses) at room temperature, they have a tendency to curl as they cool from the bottom up. This is caused by higher layers shrinking as they cool and bending the already-set lower layers....
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The following graph shows the measured temperature rise above ambient for a typical range of power supply voltages. The upper two plot lines are for no heatsink, with the LM4702 mounted above the PCB (as it normally would be) and mounted below the PCB (which....
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The following experiment shows how interestingly Mr. Steven could draw free energy from air using his home-built sec exciter coil tower, he used it to a feed a small LM317 power supply unit and made it work successfully. Read more. "When i hand wind my coils....
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This project came about due to my interest in a new form of radio transmission called DRM, which stands for "Digital Radio Mondiale" (see This is a new form of digital shortwave transmission. A few devices are available from Europe for decoding the digital....
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Hi to all So I have come to a point where I was able to think about a certain circuit design and write the Assembly code program for my 3 level mini ....
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Each one can drive 10LEDs in either bar mode like this project or dot mode. Switching between both modes can be done, more instructions in datasheet. 21 LEDs of any color you want. I used bright white ones. You can use some green, some yellow & some red for....
This 3 band equalizer circuit is an active filter network for bass, mid and high audio ranges. It is designed around the LM833 opamp from National Semiconductors. This opamp IC has the following charactersistics: very low noise figure, wide....
This electronic rf detector electronic project is designed using common transistors and other few common electronic parts. This rf detector responds to RF signals bellow the standard broadcast band to well over 500 MHz and provides an visual, and audible....
A different circuit of electronic lock very simple, one and does not need a lot of materials in order to it is manufactured....
This circuit was designed as an aid in parking the car near the garage wall when backing up. Electronics project and circuit diagram. Proximity sensor..
Motorola VWA63 Auto Radio is an automotive type all-transistor superheterodyne AM radio for standard broadcast reception. The following schematic illustrates....
A vco using the LM324. I have the schematic to the korg monotron, which uses the lm324 as the IC for the vco, but I am struggling to create a simple circuit in which the lm324 will produce an audible wave form when connected to a speaker. can anyone help....
In the first installment of this two-part article on paralleling eGaN FETs, five basic designs, utilizing four EPC2001 (100 V, 25 A) paralleled devices per switch in a half bridge configuration were presented with experimental validation. In this second....
High Voltage Stun Gun Disclaimer: As i have seen before, IT IS NOT A TOY, DON`T DO ANYTHING STUPID WITH IT. I DON`T ACCEPT ANY RESPONSIBILITY OF DAMAGES DONE TO OTHER PEOPLE OR YOURSELF WITH THIS DEVICE. IF YOU WANT TO BUILD IT YOU MUST ACC....
This is a simple update to Mr. Hareendran`s PIR Sensor Security Light circuit. It has a shortcoming limits the relay voltage to approximately 3. 3V. While this may function with some 5V relays, it will not function with all. The nature of an emitter follower....
This is simple 3-digits digital volt meter.PIC16F676 used to read analog signal(voltage) and display the value on 3-digits 7-segment. You can apply similar principles to measure DC current with parallel R shunt..
The first reverberator we present is based on TDA1022, the most used BBD. Reverberator adjustements for proper functionality Before we connect the power su....
For many years now, magnetic (or electromagnetic) water descaler devices have been showing up on the shelves of Home Improvement and other DIY stores all over Europe. Despite the numerous studies completed on that subject, by manufacturers as well as by....
This is The Fet Amplifier circuit. This circuit uses FET transistor. The gate of the FET must be negative with respect to the source, so a bias can be achieved in the following manner. The voltage that is across the source resistor is developed by the drain....
Christmas is coming and its that time of the year again when the electronics student or hobbyists thoughts turn to making a Christmas circuit for their home and especially one that flashes a few lights. There are many circuits and kits on the market that can....
This is for all the spies/paranoid people out there. An essential piece of equipment for any spy is an Electronic Bug Detector. You never know what go....
This is a low power voltmeter circuit that can be used with alternative energy systems that run on 12 and 24 volt batteries. The voltmeter is an expanded scale type that indicates small voltage steps over the 10 to 16 volt range for 12 volt batteries and....
Figure shows the V-I curve for a typical solar panel (Sharp ND-224U1F), and output power under different lighting conditions. The solar panel behaves like a constant current source at high current, and like a voltage source at low current. The transition....
Pure sine wave inverters are best, however they are expensive to buy or build. Modified sine wave inverters will power some equipment square wave inve....
This circuit is an Electronic Locker. It is controlled by a switches combination (by a code). There is a switch matrix on the door of the locker. This one is a unit of switches connected into 4 arranged of 4 columns for a total of eight terminals. When we....
This is a modified version of the first SSTC I built, the Kaizer SSTC I. It uses the same secondary, topload and driver board. New things is a full bridge of IRFP460 MOSFETs, audio modulation, shielded drivers and a new casing. I took apart a 19 ³ LCD....
The input signal it is applied to a gate G and then to a counter, for a precisely period of time After this period of time, the input signal it is stopped for a while and then the cycle it is repeated. In the time of break the content of counter it is....
This siren alarm circuit diagram is based on a specialized IC UM3561, which is a low power CMOS LSI specially designed for this type of applications. The UM3561 contains all needed parts ( oscillator, selector circuits, programmed mask ROM ) to simulate....
This sine wave generator is adjustable between 15 Hz to 150 kHz. The circuit is basically a Wien-bridge oscillator, with multiple capacitor selection. Here is...
The diagram is lamp dimmer which has the function of light gradually, gradually eliminate. It does not appear the light stimulation of the human eye when the lights suddenly illuminated, and also can reduce the damage when open lamp impact current to the....
I have some Tektronix oscilloscopes with appropriate plug in units yielding an four channel display, I always wanted something else: A true four channel oscilloscope with four distinct X/Y inputs which would allow me not only to display four traces with a....
The circuit shown here is a simple stereo FM transmitter that can transmit signals of high quality with a range of 70 feet. The circuit is based on BH1417 PLL Stereo Transmitter IC semiconductor Rhom. The IC has separate sections of audio processing for the....
The MicroCC uses the Touchstone Semiconductor TSM6025 voltage reference, a drop-in replacement for the MAX6025, with better than 15ppm/ºC stability. This is an....
Thesis by Rafael Bräg at the University of Canterbury, New Zealand in cooperation with the Universität Karlsruhe, Institut Elektrotechnik und Hochspannungstechnik....
A 40 watt fluorescent (tube lamp, TL) or two 20-watt tubes in series will be driven by this circuit. The transformer is wound on a ferrite rod 10mm dia and 8cm....
Commonly used 3-pin linear voltage regulators, for example the LM317, cannot handle input voltages in excess of about 30V. The LR8A from Supertex Inc is a new, adjustable three pin regulator that can accept input voltages up to 450V and can supply an output....
Circuit above shows a circuit diagram of the Clock Controller V1.1. P3.0-P3.3 also drives a base pin of 4-PNP transistor, 2n2907 with sink current ....
This is simply (4) 1N4148 diodes connected in series with a thermal anticipation resistor (R1) heat shrunk together at the end of a (3) wire signal cable ”it is visible on some of the photos. The use of a thermal anticipation resistor is an old HVAC....
Any type of flashing light on the main brake lights is prohibited and illegal in most states of the U. S. A. I`m verifying for the same here in Canada. In the mean time, use this circuit at your own risk and be aware that the possibility exists to be stopped....
The AN7147 Dual 5. 3-watt Audio Power Amplifier from Panasonic is listed as a replacement type` so hopefully will be around for some time to come. Together with some extra components, it can represent a simple surround-sound system requiring no opamps or a....
We know that astable multivibrator is simply an oscillator circuit that produces continuous pulses without the help of any external triggering. The oscillation frequency and time period can be manually controlled through simple modification of resistors and....
The Amstrad CPC 464 was released in 1984 and discontinued in 1990. It was possible to purchase a CPC 464 with a green screen (GT64) as well as with the standard colour screen (CTM640). Like most 8bits computers, the CPC has it`s OS (aka Firmware ) and a....
My task for the system was to implement and program all the hardware devices and make data available to the receiver program running on the PC. This includes the configuration of all Prospeckz devices and implementing protocols for radio transmissions....
It uses very common building blocks. The high voltage power supply is a classical oscillator circuit used in many places where a low current and high voltage is needed. TR is a step-up transformer salvaged from a xenon light circuit. You can find simmilar....
This circuit can control any one out of 16 devices with the help of two push-to-on switches. An up/down counter acts as a master-controller for the system. A visual indication in the form of LEDs is also available. IC1 (74LS193) is a presettable up/ down....
The white feedthroughs are for the attachment of the RF high voltage to the D`s (not shown). The copper pipe normal to the pipe is the vacuum line. The D`s have screw posts on the side for attachment to the RF power supply leads (curled copper wire). You can....
A video and the circuit with schematics for connecting and controlling the world`s smallest linear actuator based on a bipolar stepper motor from a Bluray drive...
For those are not into electronics, you must know that an oscilloscope has basically only one timebase to move the spot horizontally from left to right with the same intensity. The vertical deviation is function to the input voltage. You understand....
The following circuit shows about Honda VT750C Ace Electrical Circuit Diagram. Features:745cc 52-degree, two 36mm constant velocity carburetors, ....
The TMS320C5505 EVALUATION BOARD is specially desgined for developers in dsp field as well as beginners. The kit is designed in such way that all the possible features of the DSP will be easily used by the everyone. UART (Universal Asynchronous Receiver....
Now, to perform LED blinking in varying speed, we are sure, that we need to somehow change the delay time of an LED to remain in ON and OFF stat. So the main funda is to change the argument to function delay with change in time that`s it. Here, first we....
buzzer circuit, pic microcontroller, piezo buzzer is a computer chip. It is overkill for driving a piezo buzzer. It is certainly a very low power processor that is optimum for portable and small devices where battery power must be conserved....
This inexpensive FM radio receiver antenna booster uses the BF324 TO92 style pnp transistor in a grounded-base configuration. The circuit may be used as a....
Digital Code Lock with efficient hacking prevention from Brute Force etc. The basic user lock is of 5 Digits and Master Lock is of 10 digits so its not easy build Digital Code Lock Project Jaipur, Create Digital Lock Project jaipur, electronic code lock,....
A "video-digitiser" (also known as a "frame grabber") captures still pictures frames from a TV set, video camera, or video recorder, etc. , and forwards them to a computer for display, storage, or general manipulation. This document describes the MarkII....
A trip unit is electrically connected in parallel with a current limiting polymer element in series with circuit breaker contacts to function as a shunt resistance for the polymer element. It becomes energized by transition of the polymer element to its high....
A dimmer is quite unusual in a caravan or on a boat. Here we describe how you can make one. So if you would like to be able to adjust the mood when you re....
This amplifier circuit has a pretty good quality. Of course the sound quality, although this one amplifier does not have a large output power but in terms of soft and loud voice that this amplifier can be unreliable. With a single IC capitalize MPC576H and....
One reason why commercial soldering stations are expensive is that, in general, they require the use of soldering irons with inbuilt temperature sensors, such as thermocouples. This circuit eliminates the need for a special sensor because it senses the....
This is a circuit diagram showing the random nature of LED 7 segment. In the diagram circuit IC1 - LM555, R1, R2 and C2 on the circuit a sensitive multi-Stable...
I had heard some stories in the past concerning how poorly the 555 ran below Vcc = 5V, so I embarked on an endeavor to see if I could improve operation. Th....
This infrared alarm barrier can be used to detect persons passing through doorways, corridors and small gates. The transmitter emits a beam of infrared light which is invisible to the human eye. The buzzer at the output of the receiver is activated when the....
For maximum efficiency, set MAX_STEPPERS equal to the number of stepper motors that you are controlling (but never more than 4). Motors are referred to by their indices 0, 1, 2 and 3. On the QCard there is a trade-off between the number of motors being....
2 versions. First is one based on your schematics, except that I`ve changed those smd capacitors for standard through hole ones. Second one is somewhat modified. I`ve excluded transformer and put in standard dc jack. Also, pic and display header are located....
Driving an LED, we covered the electronic theory of how to use a Power MOSFET to turn the LED On and Off via a digital signal. In this post, we are going to walk the reader step-by-step on how to wire-up the circuit on a breadboard. The Bread board is an....
The inverting input is held low through a 10K resistor when the circuit is powered on but not being used. Whenever a measurement is being made (including calibration measurements where IN is floating), that resistor is disconnected. The circuit is used to....
This study is made possible by the availability of a motor potentiometer from All Electronics at small cost. The item is catalog number MPOT-10K, and costs $4. 00. It is manufactured by Alps, and the motor is marked MD157320, the body 725t 10BX2. The....
Using a the controlled-half-plus-fixed-half-wave phase control method, this circuit can regulate an 860 a watt lamp load from half to full power. This circuit....
Nearly all the existing designs I found used direct switching of the lights (with no software control in between) and contained manual potentiometers for light sensitivity and overall gain setting. Furthermore, I couldn`t find many references to the....
The following circuit shows about Stepper motor controller. This circuit based on the PIC16F84A IC. Features: transistor is used to drive the ...
U7 is a 6510 microprocessor. One of the features of the 6510 is a built in parallel I/O port (P0-P5). P3 - P5 control most of the cassette interface circuitry. P3 pin p6 of U7 outputs the write data signal to connector CN3 on pins E and 5. P4 is an input....
This diy digital thermometer circuit can measure temperatures up to 150?C with an accuracy of ?1?C. The temperature is read on a 1V full scale-deflectio...
A friend of mine bought a fairly new (only a couple of years old) Fender 60W combo off a guy he knew for £5. The original owner had taken it to three different repair shops, and been told it wasn`t worth repairing. I told my mate it couldn`t be much, and....
The LT3494/LT3494A are low noise boost converters with integrated power switch, Schottky diode and output disconnect circuitry. The parts use a novel* control technique resulting in low output voltage ripple as well as high ef ¬ciency over a wide load....
Although the modular Portable Mixer design available on these web pages has become a hit for many amateurs, some correspondents required a much simpler device, mainly for mixing mono signals. This design should fulfil their needs, featuring three inputs with....
The idea behind a capacitor bank is to charge up as much energy as possible to short circuit that energy through small coils, aluminium paper, steel wool, wire and a lot of other things that can conduct a electric current. The short circuit current is....
Analysis of simple digital circuits means to determine how the circuit behaves, which is represented for its truth table. So, with this aim in mind, lets organise the analysis step by step (as explained in Unit 1. 3 ) : For instance, here you are the circuit....
Some 20 years ago it was common to see small key-holders emitting an intermittent beep for a couple of seconds after its owner whistled. These devices contained a special purpose IC and therefore were not suited to home construction. The present circuit is....
For all those who like to add stuff to there truck(thats about every body) im starting a thread JUST OF WIRING DIAGRAMs Before posting your diagram....
The T5753 is a PLL transmitter IC which has been developed for the demands of RF low-cost transmission systems at data rates up to 32 kBaud. The transmitting frequency range is 310 MHz to 350 MHz. It CAN be used in both FSK and ASK systems. By ATMEL....
You can use a Cmos 4001 or a Cmos 4011 in this circuit. They have four - two-input - gates. In each case - the two inputs are joined together. So the gates are being used as simple inverters. = This means that when the two inputs are high - the output will....
This post answers the question, ""How to use interrupt based UART in PIC16F877"" ? Also, using PIC16 simulator (Proteus) you can verify this UART code and ch....
If you build fused-filament-fabrication parts (the technology that RepRap uses) at room temperature, they have a tendency to curl as they cool from the bottom up. This is caused by higher layers shrinking as they cool and bending the already-set lower layers....
The following graph shows the measured temperature rise above ambient for a typical range of power supply voltages. The upper two plot lines are for no heatsink, with the LM4702 mounted above the PCB (as it normally would be) and mounted below the PCB (which....
The following experiment shows how interestingly Mr. Steven could draw free energy from air using his home-built sec exciter coil tower, he used it to a feed a small LM317 power supply unit and made it work successfully. Read more. "When i hand wind my coils....
This project came about due to my interest in a new form of radio transmission called DRM, which stands for "Digital Radio Mondiale" (see This is a new form of digital shortwave transmission. A few devices are available from Europe for decoding the digital....
Hi to all So I have come to a point where I was able to think about a certain circuit design and write the Assembly code program for my 3 level mini ....
Each one can drive 10LEDs in either bar mode like this project or dot mode. Switching between both modes can be done, more instructions in datasheet. 21 LEDs of any color you want. I used bright white ones. You can use some green, some yellow & some red for....
