Popular Circuits Page 81
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A simple Hi Fi amplifier circuit diagram with schematic for making audio amplifier,design using TDA 2616 IC, which is a stereo power amplifier, useful for radio,tape and television. Delivers 2*12 watts net 24 watts....
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This single sided proto board provides an economical solution for developing and testing the projects around Atmel 20 pin series u-controllers (89Cx051 & AVR). Figure 1 shows the circuit diagram of proto board. All port connections are available for user....
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This acoustic sensor was originally developed for an industrial application (monitoring a siren), but will also find many domestic applications. Note that the sensor is designed with safety of operation as the top priority: this means that if it fails then....
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The 2009 Robot Rally spotlighted all the flaws that result from a quick 3 week engineering and building project. Time saving shortcuts in code and hardware bit my butt several times. Failed edge detectors - Ouch! Failed beacon tracker. chomp! Ow! Line....
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The following circuit shows about 2006 Toyota 4Runner Electrical Circuit Diagram. Features: specs on Toyota car, and how the use of safety for ....
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The 3D printer requires separate control for three independent axis. Each of the controlled axis must have a high precision electronic driver. Mechanical part of the each axis is based on a precise bipolar stepper motor connected to a drive shaft via claw....
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You can experiment with the size of the coul and the number of turns to see how it affects the frequency and signal output of the oscillator. You should be able to pick up its signal with standar FM radio receiver. The Signal In should be coupled by disc....
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The circuit is basically a radio frequency (RF) oscillator that operates around 100 MHz. Audio picked up and amplified by the electret microphone is fed into the audio amplifier stage built around the first transistor. Output from the collector is fed into....
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Most, if not all, recent cars have an impressive amount of electronics, whether it be ABS brake systems, engine control with injection calculators, airbag....
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PIC C Compilers are used to compile my source code. Liberal use is made of the many built-in functions provided by these compilers. One statement in C can generate pages of PIC ® RISC instructions. instructions you don`t have to write by hand! CCS still only....
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How to connect a buzzer to an Arduino when the buzzer operates at a different voltage to the Arduino. The circuit uses a NPN transistor for connecting the buzzer....
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Using live or neutral wire in AC household wiring as receiving antenna. Of course, this is possible only with high voltage capacitor inserted between the receiver antenna terminal and live or neutral wire. AC wiring antenna solution was mentioned as some....
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The job of this timer is to disconnect thecompressor circuit and connect a resistive heatingelement located near the evaporator atregular time intervals. The defrost heater is thermostaticallycontrolled and is used to melt any frostformation on the....
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Schematic Diagram is a layout of symbols and and connection of every electronic components circuit where serve as a guide on how the circuit function or work. Learn how to read it. At first you might think that it is hard to do so, You are not going to be an....
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We know, the maximum coverage of RSR232 serial port Transport Protocol is 10M, and the wire transmission, this needs remote transmission control to bring very great inconvenience for some. According to the needs of subject, we have designed one kind because....
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This is a very Function Generater project. can be used Triangle and Squarewave Generator. The main parts are CD40106 popular CMOS IC and a normal transistor is....
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A simple FM transmitter links your home-entertainment arrangement to a carriageable radio that can be agitated about the abode and into the aback yard. For example, you can comedy music on the CD banker in your active room, and acquire to it on a....
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It relies on the smoke that is produced in the event of a fire and passes between a bulb and an LDR, the amount of light falling on the LDR decreases. This type of circuit is called optical smoke detector. Do not use it as a home smoke detector it`s jus for....
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The tuner is programmable via I ²C-Bus and provides a FBAS signal at its output. There is also the homepage of Georg Acher containing information about this tuner. I have developed a control circuit for this tuner which uses the AT89C2051 from Atmel.....
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Recording signal amplifying transistor circuit Shows the recording signal transistor amplifier, the microphone signal..
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The following circuit shows about Audio Amplifier 25 Watt Circuit Diagram. Features: used in practically every mass market stereo receiver manufactured, better ....
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The main area for application of brushless direct current motors (BLDC) is positioning..
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CA081 and CA3140 BiMOS op amp offer minimal loading on the circuits being measured ‚The wide bandwidth and high slew rate of the CA081 allow the meter to operate up to 0. 5 MHz ..
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DDR memory power supply circuit Shows the notebook DDR memory power supply circuit, the power control circuit chip MAX8632, the chip power supply terminal VDD is Sv (detection ..
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Circuit shown in Figure 3-144. The circuit for the automatic control of dynamic braking circuit using the time relay KT control system up time, dynamic braking power using the ..
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My first tasks involved buying some VHF parts + exploring the Butler crystal oscillator. Specifically, I`ll cover my experiences with the common base version of the Butler oscillator. Like HF, the VHF knowledge base contains ever-present lore. Consider the....
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The above pictured schematic diagram is just a standard constant current model with a added current limiter, consisting
of Q1, R1, and R4. The moment too much current is flowing biases Q1 and drops the output voltage. The output voltage is: 1.2 x....
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I`ve made more headway. The other day I built a 6kHz oscillator using a 555 to produce a clock signal that I could inject into the 832. You can see the trace on the scope, and the oscillator itself pictured below. While running on the new clock, the rest of....
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GPS modem is a device which receives signals from satellite and provides information about latitude, longitude, altitude, time etc. The GPS navigator is more famous in mobiles to track the road maps. The GPS modem has an antenna which receives the satellite....
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Frequency modulation (FM) can be used to transmit analog voltage level signal with good noise immunity. The transmission itself might employs different....
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If load current requirements are relatively low (i.e. maximum forward rms current 500 mA), an ac solid state relay can be constructed quite simply by the connection of two H11C optically coupled SCRs in a back-to-back configuration as illustrated.
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Differential amplifier stability, zero drift suppression, is a common amplifier. Differential amplifier circuit shown in Figure, by two parameters identical transistors VT1, VT..
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The first television set I ever saw appeared in our house in about 1950. It looked like this - except it was in a box, obviously. My dad had built it from a kit. They made their own entertainment in those days. There was only one channel - BBC - broadcasting....
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Reverse Engineering an EVAP System - Part 1 My friend/coworker has a 1997 Volkswagen Jetta (I4) that throws an EVAP SYSTEM Countless mechanics have attempted to diagnose it; none have ....
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My site contains a few low power transmitters of one type or another, but until now no receiver. This circuit can be used to "sweep" an area or room and will indicate if a surveillance device is operative. The problem in making a suitable detector is to get....
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This Jammer circuit can be used indoor or outdoor and the coverage/range that offers is about 30 meters in order to disconnect the wireless devices from their communication with the base station. In the circuit design, we use the frequency ranges reserved by....
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The circuit that allows you to expand from one 15 pin d-sub VGA output to multiple others. I built upon the schematic found online here and expanded it to allow up to 6 monitors connected at once! The input VGA connector is on the left while the 6 output VGA....
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This article is about a software controlled, parallel port-interfacing 8-channel Pulse-Width-Modulated fan controller. I'll admit that the electronic part of it isn't very advanced, but hopefully the idea of "interfacing" might be interesting.
My old....
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An op amp is used to interface between a fiberoptic system and the MOS SCR to multi-cycle, half-wave control of a load. This receiver has two complementary outputs, one at a quiescent level of about 0.6 V and the second at 3 V. By adding a 4.7 V zener in....
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Many times we needed to strengthen a small signal in the region of VHF or FM. The preamplifier that to you we propose offers 20dB in all the region of VHF and it still can reach also their 500MHZ. The amplifier is a circuit of high frequency RF with....
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The switching power supply provides 12 volts, at 10 amps, maximum, using a discrete transistor regulator with an op-amp functioning as a comparator in the feedback circuit. With reference to the schematic, the front panel power-on light is not shown. There....
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3CX3000F7 Plasma amp conversion to 40 meters, including photos and descriptions....
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You can charge your Mobile Phone from the USB outlet of PC. This simple usb cellphone charger circuit can give regulated 4. 7 volts for charging the mobile phone. USB outlet can give 5 volts DC and 100 mA current which is sufficient for the slow charging of....
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In this circuit, an additional exclusive-OR gate is connected after the modulo-2 feedback, with CI and R2 applying the supply turn-on ramp into the feedback loop. This provides sufficient transient signal so that the PRBS generator can self-start a....
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This Design Idea stems from the limited availability of IC voltage regulators that can meet key USB-power specs, coupled with the need for turn-on sequencing and rise-time control at each output. As always, for PC-related designs, minimum cost is a primary....
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This Instructable will show you how to build your own FM radio receiver shield to be used with an Arduino board. The radio chip we are going to be using is the AR1010 on a breakoutboard found at Sparkfun or Electrokit and there will be code to get you up and....
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This page features a circuit that has twenty open collector outputs that turn on one at a time in a continuous sequential manner. The circuit make use of the 74LSxx family of TTL integrated logic devices. The circuits are designed to drive light emitting....
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A light based sensor using an LDR (Light detecting resistor) and ofcourse an Op Amp. You can use this circuit to make line followers and other stuff. Here we go: Since we are using an op amp to compare we should first be clear about its functioning.....
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Its main feature is a selection of outputs at standard fixed voltages used in electronics. Because the outputs are fixed you do not have to worry if the voltage is correct, you just plug the wire in. It is quick and easy to use. You will probably still need....
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With a bit of adeptness, you can build an electronic scales based on a servo motor. Depending on the type of servo you use, it can measure weights of up to around five kilograms (11 lbs) with reasonable accuracy. If you examine the operating principle of a....
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The schematic shows a valve / tube audio power amplifier and a type 390 Rectron B eliminator...
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RF Cafe visitor David M. wrote to ask that I scan and post this article from the January 1963 edition of Popular Electronics. It is an article written by Philip Hatfield, of the Receiving Tube Department of General Electric that describe a very simple design....
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Most dimmers use pulse width modulation (PWM) to control the amount of power that is delivered to the lamp. Those that come bundled with a switch faceplate control the firing angle of a Triac on the 240V mains side. These work fine with resistive loads but....
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This circuit consists of twin-T sine-wave oscillators. Each oscillator has a filter in the feedback loop. If the loop gain is greater than unity, the circuit will oscillate. Gain is adjusted to be just less than unity. Touching the touch plate starts the....
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Cutter is protected by a printed circuit phototransistor constructed to prevent manual feeding mistakenly stepped on the cutter switch and cause accidents. The line at the time..
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The two-chip circuit in Figure 1 provides fan control and overtemperature warning and shutdown signals to protect systems from excessive heat. The circuit monitors the temperature of the pc board and the die temperature of a CPU, an FPGA, or another IC with....
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This is a 2 MHz crystal circuit using CMOS pair. This circuit is ideal for uses in digital watches and clock because this circuit has low power drain. The oscillator in this circuit is built by connecting the One CMOS transistor pair from CA3600E array with....
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An audio compressor serves to reduce (or compress) the dynamic range Figure 6 shows the schematic for a more comprehensive compressor circuit, that offers control over The circuit below is a Dynamic Mic Compressor circuit is simple but the results are quite....
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This time on we Will Share About Schematics Of Radios Schematic Of Programmer Radio Latest Info at Onmilwiki....
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Here is the circuit diagram of an infrared motion detector that can be used to sense intrusions. Infra red rays reflected from a static object will be in one phase, and the rays reflected from a moving object will be in another phase. The circuit uses this....
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UC3842AN PWM pulse width modulation integrated circuit, which is widely used in DVD, VCD, SVCD DVD players, computers and display systems, and various other household appliances switching power supply circuits. 1. FeaturesUC3842AN integrated circuit contains....
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In the absence of radiation, no current is drawn. At normal background radiation levels the power consumption is extremely low. The instrument may be left on for several months without changing batteries. In this way the detector is always ready to indicate....
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Circuit shown in Figure 3-197. Dish adjust rheostat RP, can change the field current to change the motor speed. ..
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This circuit indicates which of three voltages in the range from about about -4V to about +4V at A, B and C is the highest by lighting one of three in....
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This circuit can drive anLED display with constant current independently of wide power supply voltage changes. It can operate with a power supply range of at least 4V to 30V. With 10M resistances for R2 and R3 and the inverting input of the comparator....
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Use of a differential capacitor allows temperature compensation of LC circuit using an NFO and N1500 ceramic. C6 is a differential capacitor that has two stators and one common rotor. When one capacitance (stator) is maximum, the other is minimum...
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The IR Widget operates in a way that makes it compatible with modern multitasking operating systems. It is able to determine the carrier frequency and demodulate the carrier in the digital or analog domain. The captured information can be used to view,....
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The circuit diagram was designed to create a power supply without utilizing any transformer circuit. This circuit illustrates the advantages as well as th....
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RTD sensors are measured with a precision 24-bit A/D (analog to digital converter) with built-in programmable gain amplifier. Connections for 2-wire RTDs, 3-wire RTDs, and 4-wire RTDs are shown. Connecting and measuring RTDs with amplifiers and data....
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Three-amplifier circuit consumes only 135 /tW of power from a ±1 V power supply. With a gain of 101, the instrumentation amplifier is ideal in sensor interface and biomedical preamplifier applications..
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Here is one of the interesting 555 timer circuits to trick your friends while studying electronics in schools. Clap switch circuit is the local name of sound controlled flip flops. This sound controlled light can also be used as sound detection sensors. Flip....
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The top MOSFET switches on creating a short circuit between the input voltage (IN) and the left hand side of the inductor, L1. The inductor current ramps up according to the equation where V is the voltage across the inductor, L is the inductance value and....
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This audio processor is based on the Signc tics/Philips TDA3810N stereo, spatial, pseudo-stereo processor, IC. This processor uses a Philips TDA3810IC device, and it functions as an expander, pseudo stereo processor, and audio enhancer. ..
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Stereo VU meter / 2 channel audio level meter using IC TA7666P. Volume level of each channel is displayed using 5 LEDs .This loudness meter uses minimum number of external componets....
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The two-tone electronic doorbell circuit is composed of the trigger control circuit and doorbell generating circuit, and it is shown in Figure 3-108. Trigger control circuit consists of doorbell button S, resistors Rl-R3, electrical wear devices Cl-C3,....
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This is designed to work with a varity of stepper motors, 5 or 6 wire unipolar types. Its also made to operate from about 9 volts to up to about 24 volts. Below is a bread board layout of the circuit but I can offer a PC board layout for those of you who....
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Here is the 22 watt stereo audio power amplifier circuit diagram based on TDA1554 and integrated circuit from NXP semiconductors (formerly PHILIPS semicon....
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Most A/D-conversion techniques use dedicated hardware, usually a single-chip IC. The flexible conversion technique allows you to use successive-approximation, ramp-type, or other converters by writing the appropriate control software. The design in Figure 1....
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For positive protection of electrical or electronic equipment, use this against excessive supply voltage. Due to improper switching, wiring, short circuits, or failure of regulators, an electronic crowbar circuit can quickly place a short circuit across the....
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A three-dimensional surround sound Ambisonic recording can be captured using a tetrahedrally arranged quartet of cardioid pattern microphone capsules connected to some simple circuitry to convert the outputs to a standard B-format signal. B-format signals....
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Application circuit works the device as shown below, a number of special occasions allowed intermittent lighting (eg doing surgery, etc.), making use of LCE module blackout eme..
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This Circuit is a simple Analog to Digital Interface with a capability of 10 to 12 bits resolution. 10 bits means 1024 counts or parts of a full scale FS which is close to 3-1/2 1999 counts. In this 1 V can be read as 1. 000 V that means even 1mV can be....
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Lamp relay delay circuit shown in Figure 7], S131, SB2 are lights button mounted anti-machi not a different place, the lamp can operate F. LEDs LEDl, LFr) 2 should be installed in SB1 and SB2 at the "Peter asked in switch position indication easy to use...
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A 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 bypass switch. The MAX2664....
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Here`s schematics for infared remotes. This remote transmits a tone using an infared LED. This tone is decoded by the receiver. Since the receiver only switches when it "hears" the tone, there are no accidental activations. ..
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