Popular Circuits Page 93
- Page 93
-
A single hand clap will be picked up by the electric mic which is coupled through C1 into the op amp IC1. The output of IC1 triggers the 555 IC timer IC2 which is configured as a monostable multivibrater. The trigger pulse is stretched by IC2 and outputs a....
-
-
-
Going camping nowadays involves taking lots of electronic equipment whether for day to day running or for fun and entertainment. Most of the time a charged lead acid battery and a power inverter would be used to ensure a smoothly organized holiday where....
-
-
The following diagram is the circuit diagram of 20W power amplifier which build based tube component EL34. EL34 is very famous tube and great for power tube amplifier. The circuit above is complete circuit contains tube amplifier circuit di....
-
This circuit is a small representation of a very low cost printer sharer i made very long ago. This is as much i can remember of the basic ideas behind the product...
-
-
Expressed in ASCII keyboard code CY512 easiest development system. It has three operating modes; 1) the immediate command execution mode. Users type ASCII commands and keyboard..
-
This is a clean preamp that I designed to use with my bass, a power amp, and a cab at a rehearsal space. (Rehearsal space being a fancy name for the singers basement. ) I am very proud of this preamp since, unlike the mu-preamp, I designed it from the ground....
-
There is one switch to reset the board. When reset is held, the board is in bootloader mode waiting for an upload from the development computer for 5 seconds. After 5 seconds, the current program is run. This board can be powered by the USB connector subject....
-
The schematic show that the AccelR8 only uses 3 IC`s. An AVR 8515 microcontroller do the calculation work and controls the other circuits. An MAX603 controls voltage and power-on/power-off. And the chip that makes it all possible, the ADXL202 from Analog....
-
This circuit could be used (depending on your circumstances) by a gentleman to summon his butler, a manager his secretary or as in the author`s case to call the kids down to dinner without having to shout above the level of the CD player/TV/games console in....
-
-
-
This simple circuit generates a dual-speed clock for personal computers. The circuit synchronizes your asynchronous switch inputs with the master clock to provide glitch-free transitions from one clock speed to the other. The dual-speed clock allows some....
-
Circuit Description: S1 promote the release of the current reaches the shut-off switch. ..
-
Circuit Pressing a single key on the keypad - will energize the relay. Entering a four-digit code of your choice - will de-energize the relay. The circuit was designed to control the Modular Burglar Alarm System - but it will have other applications. If you....
-
The system shown consists of the HA-2542, a small 12-Vdc motor, and a position encoder. During operation, the encode..
-
-
This quartz crystal oscillator circuit has greater stability than a parallel resonance circuit. It generates frequencies up to 30 MHz or even higher if you use BFR91 for T1, T2 transistors and reduce R1 R2 values. The MOSFET buffer insulate the oscillator....
-
The device presented here can generate a complementary clock signal at frequencies of 10Hz to 10MHz in steps of factor10. Thus, I chose to call it "10xHz clock generator" (with x being a number between 1 and 7). It can also be used to manually create clock....
-
The "Programmable Stiffness Joint" is a device which is able to internally modify the rotational stiffness of a simple pivot joint. It is intended to serve as a proof-of-concept for future work in developing a model for determining the respective damping and....
-
-
-
Analphanumeric low cost LCD Display is very essential for may small and big projects to Displayvarious type of information. Hitachi HD44780 Chipset based 16x2 char LCD is Really very cheap andeasily available in the local market. In this project we are going....
-
A reverse-biased pn junction of a 2N2712 transistor is used as a noise generator. The second 2N2712 is an audio amplifier. The 005 µf capacitor across the amplifier output removes some high-frequency components to simulate pink noise more closely..
-
-
UHF indicator or wavemeter is some kind of device that measures frequencies and determines LC circuit frequecy resonance. This device does not need to radiate. The oscillator is build with T1 and T2 (2 x BF494) and can be adjusted with C1 and Lx. The Lx coil....
-
DC shunt regulator power supply circuit Shown is a DC power supply circuit in parallel using the radio circuit, after the AC 22V output voltage by the step-down transformer 8V ..
-
Temperature stable resistors R1 and R2 NAND gates, they ensure that the switches in the linear region open. Capacitor C1 is a DC component at the operating frequencies, ..
-
The thyristor control circuit, with the bridge circuit to control the temperature in the contactor coil KM plus a secondary winding wound as..
-
A small bias on the bases of Q1 and Q2 via R1 and R2, assists in "starting" This gives each transistor`s base a small forward bias, so that both transistors tend to conduct when the circuit is first switched on [the base voltage on each transistor is zero....
-
100 MHz frequency and period counter using the Intersil ICM7226B 40-pin DIP. This circuit uses a CD4016 analog multiplexor to multiplex the digital outputs back to the function input. Since the CD4016 is a digitally controlled analog transmission gate no....
-
No Description available...
-
For this amplifier circuit using three voltage plus, min, and the ground. with a maximum voltage approximately 55Volt DC. And amplifier circuit can use some ic ie IC STK 030, 058, 075, 077, 078, 080, 082, 083, 084, 086. From all the ic I mentioned all of....
-
-
I am hoping to get some help on a timing circuit I need to build. I need to have a spark plug fire every 10 or 20 revolutions that a shaft....
-
Most of the IR remotes work reliably within a range of 5 metres. The circuit complexity increases if you design the IR transmitter for reliable operation over a longer range, say, metres. To double the range from 5 metres to metres, you need to increase the....
-
Resistor change in ECM Mic Preamplifier schematic diagram. The electret condenser microphone (ECM) contains a very sensitive microphone element and an internal FET preamp, a power supply in the range 2 to 10 volts DC is therefore necessary. Suitable ECM`s....
-
I needed an excuse to use the soldering iron so I figured that I might as well as make a frequency counter which is something that I`ve always wanted, but lacked in my lab. Here`s the schematic. I drew it up in OrCAD PSpice a while back. Since then, I have....
-
This 1-chip module can generate 9 different melodies. It is normally used as a doorbell, an acoustic signalling device or as a telephone "wait" melody. Once switch S1 is pressed the IC plays the melodies one after the other. It will stop after the last....
-
Driving at night, when there is a vehicle rendezvous, according to traffic regulations prescribed distance should begin two vehicles alternately opening and closing the big lig..
-
The circuit presented is a low-cost laser-diode driver with current limiting and a lasing monitor for safe operation of the laser. The driver provides temperature stabilization using a built-in thermoelectric-cooler (TEC) controller. This circuit is designed....
-
AX610 Series maximum output current IOM lOOmA, increase access regulator scalable output current, as shown in FIG. Figure (a) two reverse polarity series regulator (2CW106, U: ..
-
This is a compass circuit based at AT90S2313. The output drives 8 LEDs to indicate the different horizon directions...
-
Have you ever connected two PCs together via modems using a twisted pair cable and nothing happened? That s because the modems are expecting a phone line....
-
Project with Circuit & Code for Typing Assistant using 8051 microcontroller (AT89S52) and PS/2 keyboard port of Computer. The project also explains the interfacing of PS/2 port of computer with 8051 microcontroller ..
-
The following circuit shows about LM324 For Parking Sensor Circuit Diagram. Features: When the obstacle is beyond 25 cm none of the above LEDs ....
-
This is a step by step guide to modifying the disposable camera flash unit that powers the Geiger tube in the last post. Geiger tube power supply hack using disposable camera flash unit Remove the flash tube and trigger transformer from the circuit board....
-
The circuit diagram shows two LT1398`s from Linear Technology used to create buffered color-difference signals from RGB (red-green-blue) inputs. In this application, the R input arrives via 75 coax. It is routed to the non-inverting input of amplifier IC1a....
-
Shown for the active low pass filter circuit. Cut-off frequency fc of the circuit = 10kHz. Circuit, R1 and R2 ratio and the ratio of C1 and C2 can be various values. This circuit uses R1 = R2 and C1 = 2C2. Using C1 = C2 and R1 = 2R2 can. ..
-
Switch programmable on/off or interval timer, has three relay-switched outputs. Output one is active for the duration of time 1, output two is active for the duration of time 2, and output three is active for the duration of both one and two. Timing data is....
-
Here is the circuit diagram of IC Controlled Emergancy Light With Charger or simply 12V to 220V AC inverter circuit. The circuit shown here is that of the IC controlled emergency light. Its main features are: automatic switching-on of the light on mains....
-
There is little to be said about this circuit. All the work is done by the regulator. The 7809 can deliver up to 2 amps continuous output whilst maintaining a low noise and very well regulated supply. The circuit will work without the extra components, but....
-
Assume one of the transistor, say TR1 become conducting at first. Now, since TR1 is conducting, it`s collector emiter voltage should be ideally zero, but any way, it will be around 0. 1 volt and it`s base emiter voltage is +0. 6v. Now the capacitor c1 will....
-
Some cheap car alarms do not have a connection for the central locking system. However, in most it should be possible to find a point in the alarm circuit....
-
This interface circuit provides electrically isolated RS422 communication interface to the PC serial port the isolation circuit protect the PC from direct connection to hazardous voltages...
-
Adjusting potentiometer RP, the output voltage of the phase shift bridge diagonal oD phase change accordingly, thus obtained Rfz rectifier load power is also changed accordingl..
-
This circuit is design for same as the 10 channel LED sequencer with the addition of solid state relays to control the AC lamps. This circuit is control using relays. This is the figure of the circuit. The relay shown in the diagram is a Radio Shack 3 amp....
-
As shown in FIG frequency power supply noise filter circuit. The circuit is a double-T filter, can be used to amplify (such as sensors) weak signal, to mixed 50Hz (or 60Hz) pow..
-
Variable-reluctance sensors are preferred for industrial and automotive environments, because they sustain mechanical vibration and operation to 300°C. In most applications, they sense a steel target that is part of a rotating assembly. Because the....
-
This document presents technical details, hardware and software of a complete imaging system which uses a fast CCD sensor and a 41 Msample/s A/D converter to acquire full-frame 12 bit/pixel digitised images with a time resolution of 1.25 ms/image. The noise....
-
The circuit diagram of lead acid battery charger has been described here. The core part of this circuit is the IC LM 317...
-
Normally we often encountered the frequency meter can be used in speed sensor, tachometer, measurement or signal recurring. This frequency to voltage converter (FVC) can be used to change the voltage into a digital or analog tachometer. Circuit that consists....
-
This module is HC-06 a slave mode serial bluetooth data link. The chips is made by CSR. In this project, my mobile phone will talk to AT89C2051 via HC-06. All the complication has been put in the cage (in the java library and bluetooth module), so what I....
-
Careful examination of the photos of the amplifier will reveal that the heatsink on the HY60 near-clone I built using the TDA2050A is slightly shorter than that on the original HY60s. I placed this unit at the rear of the amplifier, and the gap provides....
-
As shown, when not in external transistor Q1, connect a 3.3k resistor between feet and legs. With this connection circuit due to internal power dissipation affect accuracy will..
-
As illustrated, is the use of integrated Hall element DN6839 dividing circuit. Circuit, the magnetic field detected by pulsating DN6839 whereby the pulse waveform, then the pul..
-
LM3914 Dot Bar Display Driver LM3914 is a monolithic integrated circuit that senses analog voltage levels and drives 20 Led stereo Vu Metre Devresi PCB Circuit LM3914 10 leds stereo vumeter circuit diagram of Eagle PCB drawing of eagle ..
-
It is not the purpose of this folio to accommodate a abundant account of the IC`s acclimated by this circuit. If you appetite added advice on this accountable amuse accredit to the Flip-Flop Made With A LM556 Timer Chip folio in the assorted circuits area of....
-
The circuit given here is of a simple H bridge motor driver circuit using easily available components. H Bridge is a very effective method for driving motors and it finds a lot of applications in many electronic projects especially in robotics. The circuit....
-
This is a complete alarm system with 5 independent zones suitable for a small office or home environment. It uses just 3 CMOS IC`s and features a timed entry / exit zone, 4 immediate zones and a panic button. There are indicators for each zone a "system....
-
Circuit is shown using 10kHz 3kHz LM565CN constitute the FM demodulation circuit. The V1 and V2 differential demodulation output diagram (b) of the differential amplifier A1 level displacement and amplification, and then by the A2 active LPF filtered....
-
Turn ON or OFF electrical devices using remote control is not a new idea and you can find so many different devices doing that very well. For realization....
-
This circuit was designed to protect a dual rail power supply from shorts across the two rails. It uses an optocoupler to monitor each supply rail, with the internal LEDs powered from ZD2 and ZD3 and the associated resistors. While the LEDs are on, the....
-
-
-
-
This is a schematic of a cable TV signal booster amplifier circuit which can be used to amplify or boost the signal of cable TV system. Use 75 Ohm coaxial cables at the input and output of the circuit and fit the circuit in a metal case. The bandwidth of the....
-
Changhong DVB-2000 digital satellite receiver switching power supply circuit Rainbow DVB -2000 top box digital satellite receiver switching power supply circuit mainly by the p..
-
The MT8885 is a monolithic DTMF transceiver with call progress Filter It is fabricated in CMOS technology offering low power consumption and high reliability. The receiver section is based upon the industry standard MT8870 DTMF receiver. The transmitter....
-
This is an automatic light dimmer circuit. You do not need to dim the lights by yourself. It is so very convenient, because we use the LDR to detect external....
-
The circuit would automatically light a bulb on arrival of a telephone ring and simultaneously mute the music system/TV audio for the duration the telephone handset is off-hook. Lighting of the bulb would not only indicate an incoming call but also help in....
-
Chandelier Dimmer , Many of the chandeliers have a pull chord switch. Now add a novelty to your chandelier and surprise the guests. Place a small wire down the lamps from....
-
Even if simple the circuit, plirej` all condition, regarding the distortion and the response of frequency. The resistance of entry is 250K and the load that can drive is between 100R and 2K....
-
This is an oscillator circuit that can be used for calibrating frequency counters, amateur receivers and frequency meters. This circuit is called 2MHz standard with dividers circuit. This circuit uses two crystals, 100kHz and 2 MHz. Here is the schematic....
-
By now many audio DIYers would be familiar with "What Compressor ", a project that apparently had its origins in one man`s dissatisfaction with Alesis` 3630 compressor and his fascination with a friend`s Joe Meek device. DeeT, as he calls himself, generously....
-
-
This car alarm circuit features Exit and Entry delays, an instant alarm zone, an intermittent siren output and automatic Reset. By adding external relays you can immobilize the vehicle and flash the lights....
-
PWM pulse width modulation controller board allows 9S12/HCS12 microcontroller or PIC microcontrollers to output 8 channels at 5 DC amps each with current sensing of the PWM waveform. PWM driver circuit for valves, PWM motor driver, solenoids, PWM heaters or....
-
Stabilized DC Power Supply with Short-Circuit Indication. The circuit gives you four different regulated DC outputs (12V, 9V, 6V and 5V) and an unregulated 18V DC output, that are selectable by way of rotary switch S2. The selected output is showed on the....
-
Ultrasonic cleaning machine is a humidifier (do not believe you removed and see) circuit is very simple, just an ultrasonic oscillator! Ultrasonic frequency signal generated by the transistor (20-40Khz or so) received a transducer (piezoelectric buzzer in....
-
A 1Hz pulse/frequency generator using the popular timer IC 555 which is wired as an Astable Multivibrator. The output pulses can be indicated visually by the LED. An Astable Multivibrator, often called a free-running Multivibrator, is a rectangular-wave....
-
Tro telephones can be used as an intercom by using this circuit. Older style rotary phones that are nonelectronic might work best in this application. Also, handsets only might be powered this way....
-
The dc output of the voltage multiplier ranges from 1000 volts to 30, 000 volts. The actual voltage depends upon the size of the CRT and its equipment application. Voltage multipliers may also be used as primary power supplies where a 177 volt-ac input is....
-
DC arc welding machine from the second load path of the power circuit shown in Fig. The circuit is only available for a longer downtime (approximately minutes) occasions, does ..
-
Bridge rectifier capacitor filter is one of the main power supply of the current amplifier circuit, such a power supply circuit configuration simple one, better performance. A ..
-
The 12KV High Voltage Generator beneath uses an abnormal adjustment to accomplish about 12, 000 volts with about 5uA of current. Two SCRs anatomy two beating architect circuits. The two SCRs acquittal a 0. 047uF a 400v capacitor through a xenon lamp activate....
-
-
This car stereo booster uses an LM2896 IC which has two integrated amplifiers. It can be powered with voltages up to 15 volts. The power output is 2. 5 watts per channel with an 8 © load and supply voltage of 12 volts. Using the bridge tehnique in the....
-
A rectangular-wave pulse generator with an extremely long period can be built using only two components: a National Semiconductor LM3710 supervisor IC and a 100-nF capacitor to eliminate noise spikes. This circuit utilises the watchdog and reset timers in....
-
This circuit is operating the room illuminates. The basic component of the circuit is a IC1 (CD4017). Push buttons room are connected by normally wired to the circuit. All circuit is separately by optocoupler, which means that the circuit is immune to....