New Circuits Page 145
- Page 145
-
-
-
Build a digital multimeter that can measure dc/ac voltages up to 100V and dc/ac currents up to 1A. The circuit will be powered by 9v battery. I have decided to use the voltmeter from and modify it according to my needs. The problem is that after implementing....
-
Interferometer is best used in calculating the index of refraction of gasses and transparent matter (i. e. air and glass). Doing so requires counting each interference circle one by one. As a matter of fact, getting a precise measurement requires counting up....
-
Simple proximity detector circuit based on NE567 IC. Circuit switches an LED when the object comes near the sensor....
-
In 2011, designing a frequency converter circuit consists in most cases of picking out an IC that has the characteristics you need from a gain and mixer spurious product standpoint, add a couple filters, and a power supply. In many cases the oscillator is....
-
The chart shows a function generator circuit composed of 555 timer. The circuit consists of a CH7555 timer and some transistors and RC components. It can generate triangle wave, square wave, sine wave, sawtooth and square wave sweep simultaneously. Ramp can....
-
-
Hi! I desperately need help concerning the circuits I`ve attached below. Basically, it is an ultrasonic receiver circuit, with two ultrasonic....
-
Here is the circuit diagram of an ultrasonic mosquito repeller. The circuit is based on the theory that insects like mosquito can be repelled by using sound frequencies in the ultrasonic (above 20KHz) range. The circuit is nothing but a PLL IC CMOS 4047....
-
A simple but effective fixed gain transformerless microphonepreamplifier circuit diagramin the picure below. The circuit amplifies differential signals from low impedance microphones by 50 dB and has an input impedance of 2 kOhms. The OP27/37 operational....
-
This circuit is half dozen Band Graphic Equaliser, you can modify sound in low, mid and high that circuit used IC 741 Op-Amp. With this circuit you can management and mix frequencies and tones as desired. The audiblefrequency spectrum is roofed in six steps:....
-
The CAN Interface is a Balanced (differential) 2-wire interface running over either a Shielded Twisted Pair (STP), Un-shielded Twisted Pair (UTP), or Ribbon cable. Each node uses a Male 9-pin D connector. The Bit Encoding used is: Non Return to Zero (NRZ)....
-
-
With this sound activated switch, control by sound may be very useful, not just on a robot but also for a bit of home automation, for example a sound-activ....
-
Looking for resistor value and capacitor value for low pass filter to remove RF. The application is removing undesired untuned RF from the crystal set ....
-
The only downside to a single opamp stage is that it inverts the signal so needs another inverting buffer to put it back again (if absolute phase is important to you). I have seen bunch of schematics with both configurations but I don`t know which one would....
-
The Ping) is an ultrasonic range finder from Parallax. It detects the distance of the closest object in front of the sensor (from 2 cm up to 3m). It works by sending out a burst of ultrasound and listening for the echo when it bounces off of an object. The....
-
The following circuit diagram is the 100 Watt power audio amplifier circuit, build based on power amp chip LM3886. The single chip of IC LM3886 is able to amplify the audio power output up to 68W . In this circuit, the two of LM3886 are para....
-
According electronic schematic of DC driver motor using L293D in figure 2, we can use it to control two DC motor continuously. We can control DC motor one to rotate clock wise and DC motor two to rotate anti clock wise. We also can control all motor to....
-
The easy way to measure high AC currents is to use a clamp meter but these are generally quite expensive and cost several hundred dollars at a minimum. Add-on clampmeter adaptors can work well but they only work with digital multimeters which have millivolt....
-
The following circuit shows about LM317T IC Fir Solar Battery Charger Circuit Diagram. Features: Simple circuit, for AA and AAA rechargeable ....
-
Transformer OCL and capacitor C1 form a tank circuit, to which are coupled sufficient turns to drive the grid in the lower left-hand winding. The output circuit is coupled by a separate winding. For good wave shape in such an oscillator, triodes and class B....
-
A novel use of solar cells makes positioning your car in the garage rather easier than old tyres, a mirror, or a chalk mark. The six solar cells in figure 1 serve as power supply and as proximity sensor. They are commercially available at relative low cost.....
-
This simple variable power supply circuit has a low production cost and delivers an output voltage between 1,5 V and 15 V with a 500 mA maximum current. It....
-
About a year ago I threw a magnetic swipe card reader into a larger Digikey order. I didn`t have any specific plans for it at the time; mostly I was just curious to learn about swipe cards and what kind of hidden information I was carrying around in my....
-
The "crossed-flags" topology of a monostable multivibrator. Also, this particular board happened to be a 912 tach, so R5, which determines the discharge rate of C2,would be different for a 911. 912`s have a 50% duty cycle (four cylinders, 45 degrees of dwell....
-
This security system is very important for any kinds of home, office, factor. there has a circuit diagram its simple and easy to build. Any one can do it. It`s a low cost circuit diagram. Many security systems use a closed loop of wires and switches arranged....
-
It is probably the most stable VFO oscillator known. Vackar configuration is rarely used because of known reason. (The NIH, not-invented-here syndrome). The frequency tuning range is above 2. 5, not observable in any other type of oscillator. The Coupling....
-
-
The circuit described here requires no physical contact for operating the appliance. You just need to move your hand between the infrared LED (IR LED1) and the photo transistor (T1). The infrared rays transmitted by IR LED1 is detected by the photo....
-
With the aggravation and improvement of human environmental consciousness day by day of the energy crisis, the development and utilization of new energy is paid attention to more and more by people. And the solar energy has been favored by people recently as....
-
As the market strives for lighter, more compact wireless and portable devices with more ingenious features crammed into an ever-tighter space, a related quest ensues for the next power supply innovation ” a powerful, compact, long-lasting, economical and....
-
So there I was, ripping out a solo during a practice on my ""new"" Hammond C2 organ and the sound falls away and gets soft to the point of no....
-
-
From ages electron-magnetic relays are being used as switches to control high voltage devices. But, because of their bulky size and noise (both electrical and mechanical) people started using TRIAC with opto-coupler as better alternative. Above circuit uses....
-
This circuit emits a beep and/or illuminates a LED when someone touches the door-handle from outside. The alarm will sound until the circuit will be switched-off....
-
This article was originally published (in a slightly modified form) in the QST magazine, December 1998 and January 1999, and in the Radio Amateur`s Handbook, 1999. Visit the American Radio Relay League for information on these publications, and a world of....
-
There are only four components required, and the cost for these is around 70p, so it would be a good candidate for a classroom exercise. Even a cheap relay like the Omron G5LA-1 5DC can switch loads of 10A at 240V. A word of caution: don`t tinker with mains....
-
This jet engine sound generator circuit is based on the sound generator IC HT2844P from Holtek Semiconductors. This particular IC can make four sounds namely low speed sound of jet engine, high speed sound of jet engine, missile sound and machine gun sound.....
-
ABSTRACT The aim of the project is to avoid vehicle collision. We can avoid these things by using ultrasonic anti-collision instrument. This instrument is fixed in front side of the vehicle. If any vehicle or obstacle comes near by this vehicle...
-
-
Triac temperature-sensitive heater control. This circuit can be modified as shown to control a motor with a constant load. As shown the circuit is for heating applications but can be used for cooling by interchanging RT and R2 (courtesy Motorola....
-
-
The following circuit shows a RF Remote Control Circuit Diagram. This circuit based on the HT12E IC. Features: original data in the parallel format, decoder IC receives the signal via the RF receiver module, using ASK (Amplitude Shift Keying) based Tx/Rx....
-
With this basic circuit, the input current is fed directly into the summing node (pin 2) and the op-amp output changes to extract the same current from the summing node through R1. The scale factor of this circuit is R1 volts per amp. That is, the output....
-
The CMX469A is a single-chip CMOS LSI circuit which operates as a full-duplex 1200, 2400 or 4800 baud FFSK/MSK modem. The mark and space frequencies are 1200/1800, 1200/2400 and 2400/4800 Hz respectively. Tone frequencies are phase continuous; transitions....
-
The MSF transmitter sends time data bit-by-bit over the 60 seconds of each minute by dropping the 60 kHz carrier. It`s a basic CW signal [1]. Two bits are transmitted every second by modifying the length and number of carrier drop(s) per second (see the....
-
The first sensor a robot usually gets fitted with is an obstacle detector. It may take three different forms, depending on the type of obstacle you want t....
-
Amplifier circuit using ic STK4065 above that which the amplifier circuit uses only ic, or also could be called this series do not have equality in the use of ic. Power amplifier output power 35Watt supplied with a voltage of 13. 5 volts DC. Impedance of the....
-
-
TDA2822 audio amplifier circuit , 1.35W into 4 ohm speaker @ 6V supply. Bridge and Stereo modes possible. 3V to 15V supply voltage range. Suitable for mini hand held audio applications....
-
You can use any LED you want for D1 - D10, however blue LEDs have a higher voltage requirement so if you want to go blue for a modern look, they may appear more dim then red, yellow or green. By leaving pin 9 of U2 disconnected, the graph will operate in dot....
-
Build a Wien bridge oscillator that oscillates at 2. 1kHz and that can be switched on by a transistor. The reason for me placing a transistor switch in the circuit is so that I can turn the oscillator on and off from a PIC MCU. However, when I build the....
-
-
The capacitor consists of two sheets of aluminium foil. Leave the foil inside the plastic packets and make connections using crocodile clips. The crocodile clips must not touch each other. The initial frequency of the pulses can be divided by up to 214....
-
Read the generic sound level from an Electret Microphone. I`ve seen a number of schematics with NPN transistors, that will provide an inverted output (~5V when quiet, ~0V when loud, linear operation in between). However, I would like non-inverted output....
-
More and more equipment is sold that runs off internal rechargeable batteries. Although a matching charger is usually supplied in the package, there are also devices that can only be charged via a USB port. That is not surprising in the case of USB MP3....
-
The BA1451F is a Tuner system IC for electronic tuning for AM Radios FM IF, and MPX. It has been developed for HiFi component applications. The MPX VCO circuit requires no adjustment, which will enable a reduction in the number of production line processes.....
-
This design idea overcomes a significant problem with using photodiodes in fast applications like barcode scanners, CD-ROMs, and DVDs--high output capacitance of the diode. The key part in the circuit is the Analog Devices AD8014..
-
Stereo Power Amplifier is 2x70Watt STA550 chip audio power with BASH concept that can be connected with digital perangkkat. 2x70Watt STA550 Stereo Power Amplifier is an amplifier with BTL system with symmetrical power supply with ground. Power amplifier....
-
Work of the circuit The circuit consists of power supply circuit, ultrasonic oscillator circuit, pre-amplifier, amplifier and power amplifier drive output circuit. (It is showed in picture 8-125.)Power supply circuit consists of power switch Sl, fuse FU,....
-
This circuit is 6-band graphic equalizer, you can adjust the sound of low, medium and higher than the IC op amp circuit used 741. With this circuit you can control and mix of frequencies and tones to your liking. Audiblefrequency spectrum is covered in six....
-
The purpose of this digital electronics project is to record messages using a dedicated voice recorder integrated circuit. Recordings are stored in a non volatile memory cells, which means that the message will still be saved even though power has been....
-
The CMX867A is a multi-standard modem for use in telephone based information and telemetry systems. Control of the device is via a simple high speed serial bus, compatible with most types of C serial Interface The data transmitted and received by the modem....
-
1997 Toyota Camry Fuel Pump Wiring Diagram...
-
This is a very-very simple mini audio amplifier circuit. The circuit build based single LM383 with several discrete circuit to support LM383. The circuit capable to deliver about 7W audio output. The circuit could be built on a perf board, universal solder....
-
Originally Posted by Electrotek so is something missing or not? This is what I`m trying to find out. I think you are missing some of the external....
-
This project is inspired by the DPRG IRPROX project. They have a pretty good PCB layout and idea. I would like to thank them for posting their project for all of us to see and learn from, I wouldn`t have started PIC programming without them, or at least not....
-
Equalizer a passive or an active electronic element or circuits (like tone control) used for the reason of altering or flattening the frequency response characteristics of a system NE5532 an internally compensated low noise dual operational amplifier with....
-
-
-
-
Bridged resistive sensing elements is common in resistive type sensors/transducers. This sensor type need a biasing voltage to operate. LM10 provide low....
-
This circuit can switch two or more devices on and off in response to a series of rapid handclaps. The claps are picked up by an electret microphone and amplified by a 741 op amp (IC1). IC1 is configured as an inverting amplifier, with its gain and hence the....
-
A variable power supply with adjustable voltage and current outputs made with the L200 regulator. Using the versatile L200 voltage regulator, this power s....
-
Consult Sensirion`s entire Datasheet Differential Pressure Sensor SDP1000/2000 catalogue on DirectIndustry. Page: 7/10....
-
Hi Parallax people, just joined the forum. I`m trying to control a CPU fan with a relay triggered by a stretch sensor. I have my circuit set up like this. Right now the stretch sensor isn`t attached, however when I power the circuit it just pulses like in....
-
A car battery charger schematic & description . This 12v automatic car battery charger circuit can be also use for charging other automobiles batteries. ....
-
The aim of this design is to reproduce a Combo amplifier of the type very common in the `sixties and the `seventies of the past century. It is well suited as a guitar amplifier but it will do a good job with any kind of electronic musical instrument or....
-
I have an Xbox 360 console which used to have a problem with the 3RLOD, I decided to remove the stock heatsinks and install a Koolance external water cooling system. This has remedied the fault with the console superbly (the console now operates at a max.....
-
This is a simple design schematic circuit for phase control circuit. The circuit can be used to control the power delivered to an AC load. The phase control circuit can control the AC waveform, cutting the cycle to give full cycle, half cycle, zero cycle, or....
-
The following circuit shows about Wiring Diagram and Electrical Circuit Troubleshooting Of 1997 Chevrolet Blazer. Features: powered by a 4. 3-liter Vortec V-6 engine, AM-FM stereo radio with CD, rear wheels moved through a four-speed automatic gearbox, air....
-
-
To invoke the Spectrum +3 diagnostic routines, first reset the machine while holding the BREAK key down. This will go into the test card dispray. Now hold down the QAZMLP keys for a few seconds unti the diagnostic title is displayed. Now follow the on screen....
-
This circuit features an intermittent siren output and automatic reset. It can be operated manually using a key-switch or a hidden switch; but it can also be wired to set itself automatically when you turn-off the ignition. By adding external relays you can....
-
-
To save the complexity of driver circuit, a multiplexer icrcuit can be used for the solution. With this multiplexed BCD decoder, we can use only one BCD....
-
A place to share and discover articles and documents. Upload what you know, share with others, or just find some articles by searching from our database....
-
This is a fairly simple project for anyone with some electronic skills. Plug this circuit into an audio source and the LEDs will blink to the rhythm o....
-
In many situations you need some kind of human interface to your microcontroller project. In this example is interfacing AVR microcontroller to standard PC AT keyboard described. According to keyboard timing diagram in bellow picture the keyboard transfers....
-
-
I`ve re-drawn it to appearance the Colpitts oscillator added clearly. L is about 1. 5 uH; 19 turns in a T50-6 amount (yellow). The amount of C6 is begin experimentally. I acclimated 69 pF (a 47 pF and 22 pF in parallel). Added about this during check-out. L....
-
The discussed automatic change over relay circuit was requested by Mr. Karimulla Baig. The circuit normally charges the connected battery at constant current through the power received from the solar panel, andrevertsto DC power from an AC/DC adapter in the....
-
This circuit a simple analog multiplier, the circuit operation may be understood by considering A2 as a controlled gain amplifier, amplifying V2, whose gain is dependent on the ratio of the resistance of PC2 to R5 and by considering A1 as a control amplifier....
-
Looking for Stepper drivers i came across ULN2003 chip which allowed me to run the motor with minimum circuitry through the parallel port on my PC( I`m not an electronics person, hence searched for the simplest option out there). But the problem is the....
-
The circuit of the unit is fairly simple, but is a bit irksome to set up. The reason is that obtaining matched FETs is not easy, so I had to make sure that the circuit would work with off-the-shelf FETs. The phase shifter is a standard opamp circuit, and has....
-
The PIC can control the motor after every beat or its possible to bypass some beats. It can be done by pushbuttons. Rotation speed and rotation length can be adjusted too. Settings are limited between values to prevent possible register overflow-underflow.....
-
This circuit uses a conventional spring loaded mouse trap, available from hardware stores. However when a mouse is caught, the circuit triggers and transmits an interrupted tone on the commercial FM band to a nearby radio receiver. This circuit is a small....
-
-
Welcome to the weblog where we discuss about electronic circuits schematics, PCB design, diy kits and electronic projects diagrams. The FM transmitter circuit is using NPN transistor 2N2222. The L1 and C1 producess necessary oscillations Q1. The collector....
-
This project slightly modifies the Google Android sample app called Bluetooth Chat so you can type a message in the Android app and that same message will appear on an LCD attached to an Arduino Uno. 1. Run the Android Bluetooth Chat sample app (after we....
-
This small circuit is ideal for checking the basic operation of an infrared remote control unit. The circuit is based on the brilliantly simple idea of connecting a piezo buzzer directly to an IR receiver IC. This method is almost as simple as connecting a....
Build a digital multimeter that can measure dc/ac voltages up to 100V and dc/ac currents up to 1A. The circuit will be powered by 9v battery. I have decided to use the voltmeter from and modify it according to my needs. The problem is that after implementing....
Interferometer is best used in calculating the index of refraction of gasses and transparent matter (i. e. air and glass). Doing so requires counting each interference circle one by one. As a matter of fact, getting a precise measurement requires counting up....
Simple proximity detector circuit based on NE567 IC. Circuit switches an LED when the object comes near the sensor....
In 2011, designing a frequency converter circuit consists in most cases of picking out an IC that has the characteristics you need from a gain and mixer spurious product standpoint, add a couple filters, and a power supply. In many cases the oscillator is....
The chart shows a function generator circuit composed of 555 timer. The circuit consists of a CH7555 timer and some transistors and RC components. It can generate triangle wave, square wave, sine wave, sawtooth and square wave sweep simultaneously. Ramp can....
Hi! I desperately need help concerning the circuits I`ve attached below. Basically, it is an ultrasonic receiver circuit, with two ultrasonic....
Here is the circuit diagram of an ultrasonic mosquito repeller. The circuit is based on the theory that insects like mosquito can be repelled by using sound frequencies in the ultrasonic (above 20KHz) range. The circuit is nothing but a PLL IC CMOS 4047....
A simple but effective fixed gain transformerless microphonepreamplifier circuit diagramin the picure below. The circuit amplifies differential signals from low impedance microphones by 50 dB and has an input impedance of 2 kOhms. The OP27/37 operational....
This circuit is half dozen Band Graphic Equaliser, you can modify sound in low, mid and high that circuit used IC 741 Op-Amp. With this circuit you can management and mix frequencies and tones as desired. The audiblefrequency spectrum is roofed in six steps:....
The CAN Interface is a Balanced (differential) 2-wire interface running over either a Shielded Twisted Pair (STP), Un-shielded Twisted Pair (UTP), or Ribbon cable. Each node uses a Male 9-pin D connector. The Bit Encoding used is: Non Return to Zero (NRZ)....
With this sound activated switch, control by sound may be very useful, not just on a robot but also for a bit of home automation, for example a sound-activ....
Looking for resistor value and capacitor value for low pass filter to remove RF. The application is removing undesired untuned RF from the crystal set ....
The only downside to a single opamp stage is that it inverts the signal so needs another inverting buffer to put it back again (if absolute phase is important to you). I have seen bunch of schematics with both configurations but I don`t know which one would....
The Ping) is an ultrasonic range finder from Parallax. It detects the distance of the closest object in front of the sensor (from 2 cm up to 3m). It works by sending out a burst of ultrasound and listening for the echo when it bounces off of an object. The....
The following circuit diagram is the 100 Watt power audio amplifier circuit, build based on power amp chip LM3886. The single chip of IC LM3886 is able to amplify the audio power output up to 68W . In this circuit, the two of LM3886 are para....
According electronic schematic of DC driver motor using L293D in figure 2, we can use it to control two DC motor continuously. We can control DC motor one to rotate clock wise and DC motor two to rotate anti clock wise. We also can control all motor to....
The easy way to measure high AC currents is to use a clamp meter but these are generally quite expensive and cost several hundred dollars at a minimum. Add-on clampmeter adaptors can work well but they only work with digital multimeters which have millivolt....
The following circuit shows about LM317T IC Fir Solar Battery Charger Circuit Diagram. Features: Simple circuit, for AA and AAA rechargeable ....
Transformer OCL and capacitor C1 form a tank circuit, to which are coupled sufficient turns to drive the grid in the lower left-hand winding. The output circuit is coupled by a separate winding. For good wave shape in such an oscillator, triodes and class B....
A novel use of solar cells makes positioning your car in the garage rather easier than old tyres, a mirror, or a chalk mark. The six solar cells in figure 1 serve as power supply and as proximity sensor. They are commercially available at relative low cost.....
This simple variable power supply circuit has a low production cost and delivers an output voltage between 1,5 V and 15 V with a 500 mA maximum current. It....
About a year ago I threw a magnetic swipe card reader into a larger Digikey order. I didn`t have any specific plans for it at the time; mostly I was just curious to learn about swipe cards and what kind of hidden information I was carrying around in my....
The "crossed-flags" topology of a monostable multivibrator. Also, this particular board happened to be a 912 tach, so R5, which determines the discharge rate of C2,would be different for a 911. 912`s have a 50% duty cycle (four cylinders, 45 degrees of dwell....
This security system is very important for any kinds of home, office, factor. there has a circuit diagram its simple and easy to build. Any one can do it. It`s a low cost circuit diagram. Many security systems use a closed loop of wires and switches arranged....
It is probably the most stable VFO oscillator known. Vackar configuration is rarely used because of known reason. (The NIH, not-invented-here syndrome). The frequency tuning range is above 2. 5, not observable in any other type of oscillator. The Coupling....
The circuit described here requires no physical contact for operating the appliance. You just need to move your hand between the infrared LED (IR LED1) and the photo transistor (T1). The infrared rays transmitted by IR LED1 is detected by the photo....
With the aggravation and improvement of human environmental consciousness day by day of the energy crisis, the development and utilization of new energy is paid attention to more and more by people. And the solar energy has been favored by people recently as....
As the market strives for lighter, more compact wireless and portable devices with more ingenious features crammed into an ever-tighter space, a related quest ensues for the next power supply innovation ” a powerful, compact, long-lasting, economical and....
So there I was, ripping out a solo during a practice on my ""new"" Hammond C2 organ and the sound falls away and gets soft to the point of no....
From ages electron-magnetic relays are being used as switches to control high voltage devices. But, because of their bulky size and noise (both electrical and mechanical) people started using TRIAC with opto-coupler as better alternative. Above circuit uses....
This circuit emits a beep and/or illuminates a LED when someone touches the door-handle from outside. The alarm will sound until the circuit will be switched-off....
This article was originally published (in a slightly modified form) in the QST magazine, December 1998 and January 1999, and in the Radio Amateur`s Handbook, 1999. Visit the American Radio Relay League for information on these publications, and a world of....
There are only four components required, and the cost for these is around 70p, so it would be a good candidate for a classroom exercise. Even a cheap relay like the Omron G5LA-1 5DC can switch loads of 10A at 240V. A word of caution: don`t tinker with mains....
This jet engine sound generator circuit is based on the sound generator IC HT2844P from Holtek Semiconductors. This particular IC can make four sounds namely low speed sound of jet engine, high speed sound of jet engine, missile sound and machine gun sound.....
ABSTRACT The aim of the project is to avoid vehicle collision. We can avoid these things by using ultrasonic anti-collision instrument. This instrument is fixed in front side of the vehicle. If any vehicle or obstacle comes near by this vehicle...
Triac temperature-sensitive heater control. This circuit can be modified as shown to control a motor with a constant load. As shown the circuit is for heating applications but can be used for cooling by interchanging RT and R2 (courtesy Motorola....
The following circuit shows a RF Remote Control Circuit Diagram. This circuit based on the HT12E IC. Features: original data in the parallel format, decoder IC receives the signal via the RF receiver module, using ASK (Amplitude Shift Keying) based Tx/Rx....
With this basic circuit, the input current is fed directly into the summing node (pin 2) and the op-amp output changes to extract the same current from the summing node through R1. The scale factor of this circuit is R1 volts per amp. That is, the output....
The CMX469A is a single-chip CMOS LSI circuit which operates as a full-duplex 1200, 2400 or 4800 baud FFSK/MSK modem. The mark and space frequencies are 1200/1800, 1200/2400 and 2400/4800 Hz respectively. Tone frequencies are phase continuous; transitions....
The MSF transmitter sends time data bit-by-bit over the 60 seconds of each minute by dropping the 60 kHz carrier. It`s a basic CW signal [1]. Two bits are transmitted every second by modifying the length and number of carrier drop(s) per second (see the....
The first sensor a robot usually gets fitted with is an obstacle detector. It may take three different forms, depending on the type of obstacle you want t....
Amplifier circuit using ic STK4065 above that which the amplifier circuit uses only ic, or also could be called this series do not have equality in the use of ic. Power amplifier output power 35Watt supplied with a voltage of 13. 5 volts DC. Impedance of the....
TDA2822 audio amplifier circuit , 1.35W into 4 ohm speaker @ 6V supply. Bridge and Stereo modes possible. 3V to 15V supply voltage range. Suitable for mini hand held audio applications....
You can use any LED you want for D1 - D10, however blue LEDs have a higher voltage requirement so if you want to go blue for a modern look, they may appear more dim then red, yellow or green. By leaving pin 9 of U2 disconnected, the graph will operate in dot....
Build a Wien bridge oscillator that oscillates at 2. 1kHz and that can be switched on by a transistor. The reason for me placing a transistor switch in the circuit is so that I can turn the oscillator on and off from a PIC MCU. However, when I build the....
The capacitor consists of two sheets of aluminium foil. Leave the foil inside the plastic packets and make connections using crocodile clips. The crocodile clips must not touch each other. The initial frequency of the pulses can be divided by up to 214....
Read the generic sound level from an Electret Microphone. I`ve seen a number of schematics with NPN transistors, that will provide an inverted output (~5V when quiet, ~0V when loud, linear operation in between). However, I would like non-inverted output....
More and more equipment is sold that runs off internal rechargeable batteries. Although a matching charger is usually supplied in the package, there are also devices that can only be charged via a USB port. That is not surprising in the case of USB MP3....
The BA1451F is a Tuner system IC for electronic tuning for AM Radios FM IF, and MPX. It has been developed for HiFi component applications. The MPX VCO circuit requires no adjustment, which will enable a reduction in the number of production line processes.....
This design idea overcomes a significant problem with using photodiodes in fast applications like barcode scanners, CD-ROMs, and DVDs--high output capacitance of the diode. The key part in the circuit is the Analog Devices AD8014..
Stereo Power Amplifier is 2x70Watt STA550 chip audio power with BASH concept that can be connected with digital perangkkat. 2x70Watt STA550 Stereo Power Amplifier is an amplifier with BTL system with symmetrical power supply with ground. Power amplifier....
Work of the circuit The circuit consists of power supply circuit, ultrasonic oscillator circuit, pre-amplifier, amplifier and power amplifier drive output circuit. (It is showed in picture 8-125.)Power supply circuit consists of power switch Sl, fuse FU,....
This circuit is 6-band graphic equalizer, you can adjust the sound of low, medium and higher than the IC op amp circuit used 741. With this circuit you can control and mix of frequencies and tones to your liking. Audiblefrequency spectrum is covered in six....
The purpose of this digital electronics project is to record messages using a dedicated voice recorder integrated circuit. Recordings are stored in a non volatile memory cells, which means that the message will still be saved even though power has been....
The CMX867A is a multi-standard modem for use in telephone based information and telemetry systems. Control of the device is via a simple high speed serial bus, compatible with most types of C serial Interface The data transmitted and received by the modem....
This is a very-very simple mini audio amplifier circuit. The circuit build based single LM383 with several discrete circuit to support LM383. The circuit capable to deliver about 7W audio output. The circuit could be built on a perf board, universal solder....
Originally Posted by Electrotek so is something missing or not? This is what I`m trying to find out. I think you are missing some of the external....
This project is inspired by the DPRG IRPROX project. They have a pretty good PCB layout and idea. I would like to thank them for posting their project for all of us to see and learn from, I wouldn`t have started PIC programming without them, or at least not....
Equalizer a passive or an active electronic element or circuits (like tone control) used for the reason of altering or flattening the frequency response characteristics of a system NE5532 an internally compensated low noise dual operational amplifier with....
Bridged resistive sensing elements is common in resistive type sensors/transducers. This sensor type need a biasing voltage to operate. LM10 provide low....
This circuit can switch two or more devices on and off in response to a series of rapid handclaps. The claps are picked up by an electret microphone and amplified by a 741 op amp (IC1). IC1 is configured as an inverting amplifier, with its gain and hence the....
A variable power supply with adjustable voltage and current outputs made with the L200 regulator. Using the versatile L200 voltage regulator, this power s....
Consult Sensirion`s entire Datasheet Differential Pressure Sensor SDP1000/2000 catalogue on DirectIndustry. Page: 7/10....
Hi Parallax people, just joined the forum. I`m trying to control a CPU fan with a relay triggered by a stretch sensor. I have my circuit set up like this. Right now the stretch sensor isn`t attached, however when I power the circuit it just pulses like in....
A car battery charger schematic & description . This 12v automatic car battery charger circuit can be also use for charging other automobiles batteries. ....
The aim of this design is to reproduce a Combo amplifier of the type very common in the `sixties and the `seventies of the past century. It is well suited as a guitar amplifier but it will do a good job with any kind of electronic musical instrument or....
I have an Xbox 360 console which used to have a problem with the 3RLOD, I decided to remove the stock heatsinks and install a Koolance external water cooling system. This has remedied the fault with the console superbly (the console now operates at a max.....
This is a simple design schematic circuit for phase control circuit. The circuit can be used to control the power delivered to an AC load. The phase control circuit can control the AC waveform, cutting the cycle to give full cycle, half cycle, zero cycle, or....
The following circuit shows about Wiring Diagram and Electrical Circuit Troubleshooting Of 1997 Chevrolet Blazer. Features: powered by a 4. 3-liter Vortec V-6 engine, AM-FM stereo radio with CD, rear wheels moved through a four-speed automatic gearbox, air....
To invoke the Spectrum +3 diagnostic routines, first reset the machine while holding the BREAK key down. This will go into the test card dispray. Now hold down the QAZMLP keys for a few seconds unti the diagnostic title is displayed. Now follow the on screen....
This circuit features an intermittent siren output and automatic reset. It can be operated manually using a key-switch or a hidden switch; but it can also be wired to set itself automatically when you turn-off the ignition. By adding external relays you can....
To save the complexity of driver circuit, a multiplexer icrcuit can be used for the solution. With this multiplexed BCD decoder, we can use only one BCD....
A place to share and discover articles and documents. Upload what you know, share with others, or just find some articles by searching from our database....
This is a fairly simple project for anyone with some electronic skills. Plug this circuit into an audio source and the LEDs will blink to the rhythm o....
In many situations you need some kind of human interface to your microcontroller project. In this example is interfacing AVR microcontroller to standard PC AT keyboard described. According to keyboard timing diagram in bellow picture the keyboard transfers....
I`ve re-drawn it to appearance the Colpitts oscillator added clearly. L is about 1. 5 uH; 19 turns in a T50-6 amount (yellow). The amount of C6 is begin experimentally. I acclimated 69 pF (a 47 pF and 22 pF in parallel). Added about this during check-out. L....
The discussed automatic change over relay circuit was requested by Mr. Karimulla Baig. The circuit normally charges the connected battery at constant current through the power received from the solar panel, andrevertsto DC power from an AC/DC adapter in the....
This circuit a simple analog multiplier, the circuit operation may be understood by considering A2 as a controlled gain amplifier, amplifying V2, whose gain is dependent on the ratio of the resistance of PC2 to R5 and by considering A1 as a control amplifier....
Looking for Stepper drivers i came across ULN2003 chip which allowed me to run the motor with minimum circuitry through the parallel port on my PC( I`m not an electronics person, hence searched for the simplest option out there). But the problem is the....
The circuit of the unit is fairly simple, but is a bit irksome to set up. The reason is that obtaining matched FETs is not easy, so I had to make sure that the circuit would work with off-the-shelf FETs. The phase shifter is a standard opamp circuit, and has....
The PIC can control the motor after every beat or its possible to bypass some beats. It can be done by pushbuttons. Rotation speed and rotation length can be adjusted too. Settings are limited between values to prevent possible register overflow-underflow.....
This circuit uses a conventional spring loaded mouse trap, available from hardware stores. However when a mouse is caught, the circuit triggers and transmits an interrupted tone on the commercial FM band to a nearby radio receiver. This circuit is a small....
Welcome to the weblog where we discuss about electronic circuits schematics, PCB design, diy kits and electronic projects diagrams. The FM transmitter circuit is using NPN transistor 2N2222. The L1 and C1 producess necessary oscillations Q1. The collector....
This project slightly modifies the Google Android sample app called Bluetooth Chat so you can type a message in the Android app and that same message will appear on an LCD attached to an Arduino Uno. 1. Run the Android Bluetooth Chat sample app (after we....
This small circuit is ideal for checking the basic operation of an infrared remote control unit. The circuit is based on the brilliantly simple idea of connecting a piezo buzzer directly to an IR receiver IC. This method is almost as simple as connecting a....
