Top Circuits Page 130
- Page 130
-
This is a very simple game circuit. You can play this with your friends. To win this game one has to scores hundred points in very short time. Incase if you want to restart the game you need to press S1 button switch. When supplies the output voltage make....
-
-
ADC is a circuit formed in a single functioning chip to change analog signal becomes digital signal. In general we apply chip ADC 8 beet to change analog signal stretch 0-5 V becomes digital level 0-255 for ADC 8 beet. At the moment have also been in big....
-
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....
-
This design has not been called a GOLD detector as this name has been left for the more complex detectors that actually discriminate been gold and other metals. There is an enormous difference between detecting gold and ordinary metals (called base metals).....
-
This circuit is which enables switching on` and off` of appliances through telephone lines. It can be used to switch appliances from any distance, overcoming the limited range of infrared and radio remote controls. The circuit described here can be used to....
-
This is an UHF band TV antenna preamp circuit with 15dB gain and build by a transistor. It is formed based on BF180 UHF Transistor. This circuit is a simple circuit. This is a figure of the circuit. The principle operation of the circuit is two stages. The....
-
-
This is a design circuit diagram of a versatile FM transmitter. This circuit doesn`t have a coil. The circuit is simple and easy to assemble. This circuit is work based on gate logic concept. This is the figure of the circuit. The gate N1 acts as a buffer....
-
This is a design for a high impedance DC voltmeter. This circuit is design with built by uA741 IC. This IC is a op-amp non-inverting DC amplifier. The IC have negative feedback that is through a DC meter requiring 1mA for full scale deflection. This is the....
-
This is a design circuit for alarm circuit. This circuit is controlled by keypad. For the core of the circuit is using a single transistor with BC547 series. This is the figure of the circuit. For operation, on a 12-key pad, look for 13 terminals. The matrix....
-
This circuit was submitted and design by Lazar Pancic from Yugoslavia. The sound card for a PC generally has a microphone input, speaker output and sometimes line inputs and outputs. The mic input is designed for dynamic microphones only in impedance range....
-
This is a design circuit for a doorbell. This circuit can produces a sound like bird sound. This circuit controlled by transistor NPN. This is the figure of the circuit. The operation of the circuit is beginning when P1 is of experimental value. Start with....
-
-
The circuit even has a current limiting feature which is a more reliable system than most commercial units have. The circuit uses 3 pass transistors which must be heat sink. Resistor R9 allows the fine tuning of the voltage to exactly 13. 8 volts and the....
-
This circuit is for graphic equalizer that can build with low components count and control using LA3600 single IC chip. The internal design of the chip uses transistors gyrator circuit, with connections to external capacitors to set the response. This is the....
-
This circuit is using Power Battery Terminal (PBT) for easy relay output and aux power connection. The LED on each channel indicates relay status. Berg pins for connecting power and trigger voltage...
-
This is a water sensor circuit design using based on a Conductive Liquid Level Sensor, this single chip circuit is very compact and simple. This circuit is an ac excited fluid level sensor, which uses alternating current to provide biasing for the sensor....
-
Phase noise is a critical performance parameter of frequency synthesizers for wireless applications. RF system designers of phase modulated cellular systems, such as PHS, GSM and IS-54, need low noise local oscillator (L. O. ) or frequency synthesizer....
-
This is a circuit design for PWM Speed DC Motor Rotation circuit. This circuit has two functions, Forward-Reverse and Regenerative Braking function. This circuit is control by MOSFET. This is the figure of the circuit; On this circuit, we can control the....
-
The timer is triggered on the zero crossing voltage pulse. The time constant is determined by C5/R14+R15 that is used to determine the conduction angle. The T2 T3 inhibits the power switch until the auxiliary supply voltage reaches 8V to guarantee that the....
-
Our DTMF decoder can be powered from a 9V battery or from your parallel printer port. It can detect and display all 16 DTMF digits on your computer screen in real-time. The Window`s program can be placed in the minimize mode and still detect tones while you....
-
This is a simple form circuit for a 2-station intercom using common 8R mini speakers. The press-to-talk switches should have a spring-return so the intercom can never be left ON. This is the figure of the circuit; Power the speaker from a separate power....
-
This design circuit is shows an LM1893 power line modem circuit. This circuit is used to transfer information between remote locations by using the power mains. This circuit uses LM1893 that is used as a power line interface for half-duplex (bi-directional)....
-
The length of time the circuit stays on for depends on how long it takes for the stored electrical current to leak back into the circuit, keeping the transistor (and thus the entire circuit) energized. We have a resistor that is limiting the rate at which....
-
This circuit is use to Digital Radar Speedometer. It allows us to evaluate the speed of any object moving, especially cars and other vehicles. The speed is calculated in kilometers per hour (KPH). Its display has three digits. This radar works with the laser....
-
It is very interesting project with many practical applications in security and alarm systems for homes, shops and cars. It consists of a set of ultrasonic receiver and transmitter which operate at the same frequency. This is a one design circuit for the....
-
The ESR Meter is basically an AC Ohmmeter with special scales and protective circuitry. It provides a continuous reading of series resistance in electrolytic capacitors. It operates at 100 kHz to keep the capacitive reactance factor near zero. Here`s the....
-
This is a design circuit for scoring game circuit that can be used for all occasions when a dice is needed. The circuit is based on a NE555 timer, a 74LS192 counter, a74LS247 decoder and a & segment LED display. The timer IC1 will produce the clock for the....
-
Here`s a design circuit for very simple low cost and ultra compact VHF UHF Low-Noise amplifiers circuit can be designed using the MAX2664 and MAX2665 ultra-compact LNAs for VHF/UHF applications. These devices incorporate a broadband LNA with an integrated....
-
This is a design circuit for tachometer circuit based on the LM2907 IC can be used to provide zero crossing datum to a digital system. At each zero crossing of the input signal the charge pump changes the state of capacitor C1 and provides a one-shot pulse....
-
Another application of FVC (frequency-to-voltage converter) is tone/frequency decoder. This circuit is used to determine the frequency band of an oscillation signal. This circuit is used in many application like determines the frequency band in the signal....
-
Here`s a design circuit for frequency modulator that is completed with tuning circuit. In this circuit is using pair of 1N4007s are used as varactor diodes. I picked 1N4007s not because they are particularly well suited, but simply that I had some on the....
-
This scheme named Audio Mixer a real very simple and component easy to be got, generally circuit Audio Mixer is used with a few IC, but at this Audio Mixer circuit only requires transistor as its brace. For good result applied preventive reactor with....
-
This scheme is sine wave oscillator, with frequency from 5 Hertz up to 5 KHZ. Capasitor C1, C2, C3 altogether valuable 100pF, yielded frequency 5 KHZ. To get other frequency magnitude of we ready to change value at C1, C2 and C3, like under this...
-
This scheme applies amplifier OpAmp LM301 to awaken square wave that is simple. LM301 applies power allowance 3 V - 36 V, with highest frequency 325 kHzs. Oscillation frequency given in equation. where f is Hertz, R in Ohm, C in Farad. Active Pressure C1....
-
Hey another cool thing I found is that if you earth both the earth of the circuit to ground and the other end of the antenna to a separate ground, you increase the power dramaticaly, compared to using a normal antenna and coil. I made a similar coil to the....
-
Bedini student, Rick Friedrich, presents his set-up and results, claiming that in the process of moving charge from one battery to another through the motor system, that this system can achieve a net energy gain, harvesting energy from the environment....
-
All about the famous Corsair and Commando Transmitters designed by Dave Martin of WNKR. This blog will show you how to make each of the transmitters and show you examples that other people have made for them selves. The circuit below is basically the first 2....
-
The principle is that there is a certain parasite capacitance between coil windings, which stores a certain amount of energy. By winding the coil bifilar, you get substantial bigger voltage differences between adjacent windings and therefore more energy is....
-
-
This circuit is allows you to use a cheap loudspeaker as a microphone. Sound waves reaching the speaker cone cause fluctuations in the voice coil. The voice coil moving in the speakers magnetic field will produce a small electrical signal. The circuit is....
-
It is very rugged and reasonably power amplifier circuit that can be used for any audio applications. The amplifier produces 60W rms at 50V supply on a 8 Ohm load. The circuit is designed such that most of the components are not critical and can be easily....
-
The video amplifier in the diagram is a well-known design. Simple, yet very useful, were it not for the ease with which the transistors can be damaged if the potentiometers (black level and signal amplitude) are in their extreme position. Fortunately, this....
-
To take advantage of sunlight shining on the earth can continue to be utilized to serve as a power source so that we can at least save on electricity prices continuing to rise, below is one of a series of simple power plant can be created and used to fill....
-
This 8V DC power supply was designed for use with an expensive piece of electronic equipment. It features full over-voltage protection as a precaution against regulator failure, either in the supply itself or inside the equipment it is powering. The circuit....
-
Differentiator circuit is application circuit from playable mathematics formula (influenced) from capacitor activity. The circuit like at picture under this with simple circuit from differentiator. To get formula differentiator, the sequence is as following:....
-
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....
-
An astable multivibrator is referred to an electronic configuration which is able to generate continuous alternate high and low pulses from a couple of outputs, operating in tandem. The IC 4093 basically consists of four individual NAND gates in one package,....
-
An increasing number of appliances draw a very small current from the power supply. If you need to design a mains powered device, you could generally choose between a linear and a switch-mode power supply. However, what if the appliance`s total power....
-
This MP3 Player FM transmitter can be used to listen to your own music throughout your home. The transmitter circuit use no coils that have to be wound. When this FM transmitter used in the car, there is no need for a separate input to the car stereo to play....
-
-
-
I have been working on driving an analog VU meter based on the sound going out the Raspberry Pi`s audio outputs. This now works! The music [1] is playing from a Raspberry Pi, with software running on the Pi digitally sampling the peak output audio level and....
-
I tried photo paper, telephone book paper, color pages of magazines, dextrin covered paper, the various catalogs of electronic supply companies. I tried different temperatures of the hot iron, higher & lower pressure. I tried different board cleaning....
-
I am always being asked where the defrost timer is located on a refrigerator. Unfortunately the location varies depending on the manufacturer and model. Some are located in the rear near the compressor. Others are behind the louvered kick-plate in the front.....
-
-
You can easily build a barebones Arduino yourself. This project shows a breadboarded Arduino without an FTDI chip. This means no USB connectivity (this could be however accomplished using a USB-Serial breakout board). Use an ATMEGA168, a 1k resistor, a....
-
-
-
This device is used to photograph moving objects by triggering a camera or flashgun when one or two light beams are interrupted. It was designed to capture insects in flight, but can also be used for projectiles and anything else that moves too fast or....
-
-
When both S1 and R2 are on, current flows through each of the lamps, which are connected to the rheostat in. parallel. The amount of current flow and thus the intensity of illumination can be controlled by varying the effective the batteries because the....
-
When I was designing an off-line boost-mode switching power supply, I wanted to model the power transformer, to be able to also simulate the inrush current and other startup behavior. After doing some searches and asking some questions in discussion groups....
-
-
-
-
-
One of the largest sites for do-it-yourself guitar effects builders. Schematics and Printed circuit board layouts for rare pedals like the Tycobrahe Octavia, Clyde McCoy wah and lots of vintage fuzz pedals!....
-
-
How to turn on equipment by sending SMS `1111` ON `and switch off the equipment by sending SMS` 0000 GSM Switch will receive instructions either load 1 (L1), load 2 (L2), load 3 (L3) or load 4 (L4). Then the GSM Switch will send the four load status is ONor....
-
-
Two circuits for laser transmitters. The first uses a simple laser pointer module. Any of the normal 3 or 5mW devices will function well. Imports from the USA or Hong Kong are frequently a higher power than the UK approved units. The modules normally contain....
-
This design is based on that of Andrew Bruno. His design appeared under the name of "bruno-if". My contribution was to provide Postscript files for a Printed Circuit Board. This circuit is quite old and goes back to the days of NMEA-0180 and 0182. Note that....
-
A full foot long arc and get to more then 1million volts eventually. I have finally built a REAL Tesla coil that operates via an arc and capacitor combination. Not just a flyback or transformer setup in series. It was not as difficult as I thought it might....
-
a simple electronic combination lock using IC LS 7220. This circuit uses a relay for controlling any type of device when the combinations of four digits are pressed. Keypads are used as input here to enter the digits and the correct combination will activate....
-
Convertor circuits are widely used in all places and there are several types in it. Here is a simple Frequency to Voltage convertor circuit uses a IC LM331 which is basically a precision voltage to frequency convertor. This IC has lot of applications with it....
-
Continued from the previous post. The same priciple is true for the followings, temperature to current transmitter. In this case the input voltage is propotional to the measured temperature, not the rotation. Temperature input, full analog, 2 wire, 4-20 mA....
-
-
-
-
To send the Sony command "TV - mute", the command would be infraout 1, 20. Note that device should always be 1 when used in PICAXE projects and data can only be between 0 and 127, as the SIRCS protocol only specifies 7-bit capability. The full program for....
-
Amplifier circuit is also very suitable when used in fm radio receiver. Supply voltage required 8 - 25 Volt DC with a maximum output power 0. 15W. See Schematic below...
-
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....
-
Car power amplifier uses SI1050GL IC as the main amplifier. The output power 50 Watt 8 ohm mono impedance. Up to 25 Volt DC voltage. with source voltage of this amplifier car battery has to work. Minimum of 12 Volt battery voltage, less than a sound or audio....
-
One type of regulator of tone / tone controls are the Audio Graphic Equalizer. Audio Graphic Equalizer have 2 kinds in my opinion. Namely Audio Graphic Equalizer Bar and the type of parametric type is often called parametric equalizer. Audio Graphic....
-
-
Amplifier circuit is very suitable for use in subwoofer speaker, because its strong. This circuit using ic, ic based on STK. to use it can be used on cars that use speakers or a subwoofer system in his car. 30 V supply voltage that has been rectified. Power....
-
I will share about the series used in the usb to charge battery. Issued voltage 4. 7 Volt to 5 Volt DC suitable for battery charge the phone, as well as other batteries. Below is a circuit where the voltage is removed the usb on the computer will be....
-
-
3 channel audio mixer circuit uses voltage 9VDC summber which can supplied from a battery. 3 channel audio mixer circuit is designed special for the purposes of this Public Amplifier. Because the audio circuit of this mixer is designed specifically for the....
-
The circuit is more deserves to be called Evaluation Board AT89C2051 and AT89C4051. Some of the advantages of circuit Minimum System AT89C2051 / AT89C2051 and AT89C4051 Evaluation Board which I was present this time, hardware-hardware support below:..
-
this circuit serves as a motor controller circuit to easily controlling or varying the RPM & Phase control of a AC motor. source: directly 220VAC Load: approx. 1hp AC motor (600w-1kw) CIRCUIT DIAGRAM: COMPONENT PARTLIST: C1 = 2G ....
-
-
Play this game alone or with your friends. The circuit comprises a timer IC, two decade counters and a display driver along with a 7-segment display. The game is simple. As stated above, it is a scoring game and the competitor who scores 100 points rapidly....
-
-
This tutorial shows concepts for make a lamp withdual actuation. Through aparallelswitchor by relay controlled with RF Module (based on protocol of ZigBee- IEEE 802. 15. 4). The circuit one is a receiver. This circuit controls the load and have a Relay....
-
The KD2BD Pacsat Modem is a low cost, high performance 1200 bps BPSK modem designed to interface between a packet radio terminal node controller (TNC) and an amateur satellite ground station, and allows full-duplex access to the 1200 baud "Pacsat"....
-
This is a 16X2 switcher so it gives me plenty of room for expansion. While the cameras are nice, what I really wanted was the ability to pan and tilt selected cameras to change the view if necessary. I did quite a bit of searching and most of the pan and....
-
-
spring reverb It sounds really clean and natural almost too good to be a spring reverb. But when you whack the reverb springs - *POW* - you get dub explosions....
-
-
This is a continuation of my previous article regarding class d amp using 555 timer chip. Looking back to several schematics on that article, some of you may wonder why I include another 555 as U2 in the drawing. The main purpose of this U2 is to establish....