Popular Circuits Page 216
- Page 216
-
Got a free treadmill. Here`s the diagram that came with it. Sorry about the size. I have a question about a board that is up in the console. It has four readouts, time, speed, distance and calories. Don`t need those. It also has a membrane panel with four....
-
-
-
Automatic Gain Control or AGC is a circuit design which maintain the same level of amplification for sound or radio frequency. If the signal is too low the....
-
a Pierce "aperiodic" oscillator driving a non-neutralized power amplifier for a multiband Morse code transmitter that requires just one coil and minimum adjustment. And then one day you happen to unplug the oscillator tube only to find that it still works!....
-
In battery-powered applications, like cell phones, PDAs, digital cameras, etc. , an integrated dc-dc converter circuit solution offers several advantages in terms of cost, size, and design complexity. A critical hurdle in obtaining a fully integrated....
-
After some time of no building activity, the dark afternoons and less busy week-ends has come finally. Perfect time of the season to build a new rig. See what is being done on my bench. I like this way of start, because of easy modelling a components layout.....
-
-
Compensation is to focus on high-pressure high-voltage capacitor bank focused on the plant installed in the substation 6-10kV bus. Compensation can only be compensated in this ..
-
An EEPROM is kinds of novalatile memory, that means it is used for storing digital data permanently without any power suply. EEPROM stands for Electrically Erasable Programmable Read Only Memory. The advantage of these kind of ROMs is that they can be erased....
-
Electronic Coin Toss Circuit Diagram This is electronic coin toss circuit using one CD4049 IC (Hex inverting buffer and TTL driver). This IC....
-
This amplifier was designed to be self-contained in a small loudspeaker box. It can be feed by Walkman, Mini-Disc, iPod and CD players, computers and similar devices fitted with line or headphone output. Of course, in most cases you will have to make two....
-
The high-speed peak detector uses a highly accurate, fast s/h amplifier controlled by a highspeed comparator. The s/h amplifier holds the peak voltage, until the comparator switches the amp to its sample mode, to capture a new, higher voltage level. The....
-
-
The simple circuit design in Figure 1 lets you measure all components of a current flowing in a dc servo motor. The rectified output of the circuit uses ground as a reference, so you can measure the output by using a single-ended A/D converter. The....
-
A MAX620 connected to form a complete stepper-motor drive. TTL/CMOS signals from the logic network are translated to high-side levels that drive four N-channel power MOSFETs, supplying current to each of four stepper-motor phases. The diodes provide a....
-
Feedback in public address amplifier is something that should be avoided. The ideal solution is by adjusting the microphone and the speaker position, but it`s not always possible in many situation. Using frequency shifter to change the output frequency 10Hz....
-
The amplifier has exactly the same architecture as TX500 with the difference that TX300 has only one stage variable VHF amplifier. It is a cute schematic that was made for all of you who wanted something even simpler than TX500 and with not as many necessary....
-
1kHz RC phase shift oscillator circuit ..
-
-
This Circuit needs a adapted 10V-DC advanced end able of bartering 2 Amps. Starts the allegation aeon at 240mA and at abounding allegation switches automatically to a float action (trickle charge) of 12mA. The capacitors are the bowl 50V (or better) type.....
-
The circuit can increase the system power factor ? to the number higher than 0.99, and it can effectively suppress the waveform distortion of the input supply current iin to meet requirements of GB15144 with the distortion index being lower than L level, and....
-
The RF2516 is a monolithic integrated circuit intended for use as a low-cost AM/ASK transmitter. The device is pro- vided in a 16-pin QSOP-16 package and is designed to provide a phased locked frequency source for use in local Oscillator or transmitter....
-
-
IC H Bridge DC motor driver L298 has two H-Bridge circuit in it, so it can be used to download the drive two DC motors. H Bridge DC motor driver L298 each can deliver currents up to 2A. However, in use, the H Bridge DC motor driver L298 can be used in....
-
This article was previously published at, but I`d like to spread the idea further, possibly sparking new ideas in some of you, so I`m releasing it here too. My old partner and I were working on an improved version, using an ULN2803A instead of the many....
-
-
The microphone amplifier / modulator is build around LM324 which is a quad op amplifier provides enough quality amplification to voice picked up by the condenser microphone...
-
This kit is the earlier, now retired Ensemble RX version. These instructions are provided for those who possess and might have delayed building that version of the Ensemble RX kit. The latest version is the Ensemble RX II. Kit. The Ensemble RX kit and its 4.....
-
Embedded I/O board provides isolated high voltage switch inputs and eight high current high voltage DC outputs using optically isolated, open drain N-MOSFET transistors as solid state relays (SSR) for controlling resistive or inductive loads, including....
-
Corridor counter delay circuit for controlling lights This circuit is tested and functionable. When the circuit is energized, the 555 oscillator starts to oscillate, CC40161 is..
-
UGN-3501T Hall sensor due to the composition of the counter circuit diagram UGN-3501T has a high sensitivity, it can feel very small magnetic..
-
This chapter provides detailed schematics of a variety of power supplies suitable for use with the common Ar/Kr ion tubes available to the hobbyist on the surplus market. Included are examples of commercial designs (Omnichrome 150R and 532 head, Lexel 88 and....
-
When the water is empty the wires in the tank are open circuited and the 180K resistors pulls the switch low hence opening the switch and LEDs are OFF. As the water starts filling up, first the wire in the tank connected to S1 and the + supply are shorted by....
-
What is the effect of digital signal bits cross-talking into the analog section of a data-conversion system? There is a lot written into the data sheets of ADCs and DACs on how to minimize it. But, when asked what is the result, most laymen have the insight....
-
-
This is the schematic diagram of basic oscillator circuit which using two transistors. When two transistors and a couple of passive components are connected as shown in the figure, the circuit starts to oscillate. The frequency of oscillation can be adjusted....
-
This Spark Can Be Very DANGEROUS, So BE CAREFUL. WARNING: FAILURE TO DO SO: WILL CAUSE THE CASE OF THE COIL TO ALSO BE ELECTRIFIED! NOTE You MUST have a LOAD on the High Voltage Output. With NO LOAD, you have a High Risk to "Damage the Ignition Coil". Either....
-
This antenna amplifier is very useful for 35kHz-150Mhz frequency band. This antenna amplifier circuit is based on transistors and has a low 3dB non-linearity and a high gain of 43 dB. The input and output impedance for this rf amplifier is 75 ohms. All used....
-
This circuit can be used to prevent relay contact arcing for loads up to 50 amperes. There is some delay between the time a relay coil is energized and the time the contacts close. There is also a delay between the time the coil is de-energized and the time....
-
A 2004 Chevy Tahoe that totally lost power. I was driving at 60 mph and watched my tachometer drop to nothing. It has been in the shop for three days now, and they are having trouble figuring out what is wrong. They have tried a couple things but the engine....
-
-
An electric guitar often has to be connected to a mixing panel, a tape deck or a portable studio. As far..
-
As shown in FIG grounds MAX4104/4105/4304/4305 video cable driver amplifier circuit configured. MAX4104/4105/4304/4305 as a coaxial transmission line suitable for amplifying vi..
-
To operate a microcontroller, you need some basic components to support it and the circuit we call it basic circuit. The components needed are very common and you can find them at any electronics store out there. Here, i will share the schematic of basic....
-
-
This circuit can generate high-voltage pulses with an inexpensive auto ignition coil. Add a rectifier on the output and the circuit produces high-voltage de. The circuit"s input is 115 Vac. During the input"s positive half cycle, energy is stored in....
-
Very simple and useful circuit for communication between two person. The Q1 is used to amplify the weak output signal of speaker when one push his (her) side push-button to speak. The base-common configuration of the Q1 pre-amplifier is for matching low....
-
This circuit uses a comparator as a Schmitt trigger (311H) and two active bandpass filters (LM318H). 3-kHz output ..
-
Recently, I have needed to measure inductances in the hundreds of microhenries to several millihenry range. Though I have a pretty good LRC meter and an excellent bridge on my workbench in Mesa, Arizona, I wanted to make these measurements in my home in....
-
-
Volvo S40 Wiring Diagram Radio 1997 Manual PDF Download...
-
Single-chip digital voltmeter. This 4 1/2-digit DVM circuit is built around a Maxim ICL7129ACPL A/D converter and LCD driver. An ICL8069 CCZR 1.2-V band-gap reference diode is used for a...
-
Generating sine waves with controlled frequencies over a wide range is difficult when using RC or LC sinusoidal oscillators. However, this performance can be simply created using a wideband digital squarewave oscillator, a counter, and a weighted summing....
-
-
-
Hey all I`ve got a paper this year in (active) electronics. I`m in the second year of a bachelor in audio production. Our main project will be to....
-
33. DA converter circuit ; Shows the basic structure of the multi-channel D/A converter circuit, it can be more consistent with the encoded signal is converted into a digital s..
-
As I carry out a lot of repairs on C. B. and audio equipment, I need a variable power supply with very good current limiting and protection. The circuit I designed for this purpose is shown in the diagram below. This power unit will deliver a current from....
-
Interactive voice response (IVR) system is a communication system which provides automated telephone call access to specified computer database information. Interactive Voice Response is a technology that allows computer to detect DTMF (Dual-tone....
-
The TDA7000 has an FLL (Frequency-Locked-Loop) system with an intermediate frequency of 70 kHz and the selectivity is obtained by active RC filters. The only function which needs calibration is the resonant circuit for the oscillator (for the reception....
-
The UM3561 contains programmed mask ROM to simulate siren sound. Power consumption of IC is low. It is powered by 3 Volt. One NPN Transistor is used for amplification of audio signal...
-
-
A truly timeless circuit. LM317 is a versatile and highly efficient 1.2-37V voltage regulator that can provide up to 1.5A of current with a large heat sink. It`s ideal for just about any application. This was my first workbench power supply and I still use....
-
CMOS gate has a high input impedance, resistance by human contact, you can make it the input level is changed, triggering gates toggled. ..
-
FIG humidity / frequency conversion circuit. The same as the above humidity sensors, humidity 76% isochronous The equivalent capacitance of 500pF, capacitive relative humidity variation rate was +1.7 pF /%. Circuits, A1 is the integrating circuit,..
-
With the preset at its max. the flashing rate of the LED is about 1/2 a second. It can be increased by increasing the value of the capacitor from 10uF to a higher value. For example if it is increased to 22uF the flashing rate becomes 1 second. Make a PCB in....
-
-
A microcomputer-to-triac interface uses a phototriac optoisolator to Jet safety-isolated logic signals directly control high-power loads. Depending on the input waveforms and the load, this circuit can be used in either an on/off switch or a proportional....
-
A voltage-variable capacitance tuning diode is placed in series with the crystal feedback path. Changing the voltage on VR varies the luning diode capacitance and tunes the oscillator. The 510-KO resistor, R1, establishes a reference voltage for VR -ground....
-
Not thrilled with how a computer soundcard drove my 32ohm headphones so I decided to build myself class-A mosfet headphone amplifier. As with most of my projects, the goal was to keep it simple, keep cost down and try use some salvaged parts. This is a....
-
TDA 2030 is produced by SGS Ates and is a complete audio amplifier. Class AB amplifier to deliver final cand 14 watts into 4 ohms, a source of +-14V power. Connecting two TDA2030 through cheap power transistors that can create an amplifier that can deliver a....
-
Agriculture and electrical power harrow plow power cord must be used four rubber cable, wherein a core wire as a ground wire, traction machine housing must be grounded. Two tra..
-
This project is a real winner in more ways than one. When you understand how the circuit works, it is really 4 projects in one. And it has two modes of operation: MANUAL and AUTOMATIC.
Everyone likes a little flutter. The introduction of so many outlets in....
-
A circuit of a remote control unit which makes use of the radio frequency signals to control various electrical appliances. This remote control unit has 4 channels which can be easily extended to 12. This circuit differs from similar circuits in view of its....
-
Hi guys, I`m building a basic RC Car. There`s an LED in the receiver circuit which lights up when I press a button on the remote. But when I connect....
-
As shown in FIG Xin US recorders automatically circuitry. The circuit mainly uses a new power switching device TWH8778, making simple, without debugging. TWH8778 shape and each..
-
How to make the hardware connections between the Raspberry Pi and the house wiring. Check out this post if you want a PCB that does the connections for you. In my house (and the vast majority of others) the thermostat wiring runs at 24V AC. There`s a live....
-
CAD`s original E100 microphone was an inexpensive (for its time) multi-purpose studio condenser microphone, with an electret capsule and a neutral sound profile. Part of CAD`s Equitek series, the E100 had an innovative transformerless amplifier circuit....
-
750mW bridge-tied load audio amplifier circuit by the LM4065 amplifier with DC volume control IC composition is shown below. LM4865 8-pin SO package and an 8-pin mini SMD packa..
-
-
-
This application note explains the operation of the data slicers found in the Maxim line of UHF receivers like the MAX1470, MAX1473, and MAX1471 and transceivers like the MAX7030 and MAX7032....
-
This is a coincidence detector circuit. This circuit is very useful for monitoring complex logic circuits. This circuit has two inputs, A and B. if A and B are....
-
Wanted the flashlight to be squat so I could hold it in my mouth, throw it in mypocket, and lay it on a surface with the beam shootingup. I wanted to build it for about $15, which was around 1/4 what they were selling for when I started the project. Prices....
-
The panels look good and the cases are neat. What are the cases made from. MDF board I noticed the panels are recessed quite a bit too. I`m guessing this is to protect the knobs etc. I`m curious how deep your cases are I`m working on getting my circuits....
-
-
The EE-91 is a wall mounted metal telephone box. It is a common battery phone which means transmitter current is obtained from the central office battery. It is equipped with a single gong ringer. It has a hand generator for signalling magneto lines. It has....
-
This circuit can generate a European police-car siren, bird noises, spaceship sounds, etc. In addition, it can be put to use as a doorbell, an alarm, etc. The circuit consists of four parts: a binary counter, a D/A converter, a VCO, and an audio output....
-
A triac controller for switching resistive loads directly from the mains supply using the zero crossing technique. The device is powered directly from the mains via a diode and dropper resistor, and the IC has its own regulator to limit its supply to 9.25V.....
-
-
Most of my circuits still use 5 V regulated power for the chips, because 8-bit microcontrollers run faster and some sensors require 5 V. Since 5 V is more than enough for even a white LED, I`m not concerned with the voltage needed by a particular LED in use.....
-
Radio Remote Control using DTMF. Here is a circuit of a remote control unit which makes use of the radio frequency signals to control various electrical appliances. This remote control unit has...
-
My audio source will be a Line Level Audio -2V to +2V AC passed through a 220uF coupling cap and then a low pass filter(RC, 2 pole). The signal will be read by an ADC another one that i have seen is I don`t quite understand this FET-BJT preamp circuit And....
-
Using the bilateral properties of a balanced mixer this transvertcr will produce 6-m output with 2-m inputs. Y1 is a 90-MHz crystal. Note that the input on 2 m is 143 to 144 MHz for 53 to 54-MHz output. This avoids possibility of extraneous 2-m reception....
-
AC voltage is rectified by a bridge (VD1-VD4). 3R1 limiting buck, VD5 clipping, a trapezoidal wave as the trigger circuit DC voltage and synchronization. When VT1 base of RP1 r..
-
As shown, in FIG a decimal seven storage - Decoding - drive unit 74 143, this unit has a constant output for all segments. Each at a voltage of 5V when the current is about 15 ..
-
A keypad enters a four-digit access code, which is programmed via jumpers on a 24-pin plug-in header and socket. Ul is a..
-
Use fluorescent starter bimetal can be prepared as a temperature sensing element, as the thermostatic control. Double metal sheet for temperature sensing element, the circuit is simple, easy to..
-
A Simple Infrared controlled Switch. It can be operated using the TV remote handset. The Load can be any AC operated device which can be connected to the relay. The load turns on for three minutes then goes off. It can be used to switch on the lamp in the TV....
-
-
After 3t40V power Sutra T seats is reduced to 6.3V low voltage by VDi - V sulfone full transition rectified. c1 filter provide after - when caution circuit NI/555 operating vol..
-
This Line Following Robot sensor or surface scanner for robots is a very simple, stamp-sized, short range (5-10mm) Infrared proximity detector wired around...