Popular Circuits Page 11
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The robot was controlled with a Motorola 68HC11 on a special MC11 input/output board furnished by the Stanford Smart Product Design Lab (SPDL). The SPDL also furninshed motor controller boards, each consisting of a DS3658 stepper controller, a SN754410....
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The dual, voltage-output DACs shown in the figure below employ a combination of power-conserving tricks to draw less than 20µA from a 5V supply. The circuit suits a need for programmable voltage generation in slow or static applications, such as the nulling....
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The circuit below uses a CMOS dual D flip flop (CD4013) to toggle a relay or other load with a momentary push button. Several push buttons can be wired in parallel to control the relay from multiple locations...
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This circuit lets an external 12V SLA battery power a camcorder which normally has an inbuilt 7. 2V battery. Such batteries can now be very difficult or expensive to obtain for earlier model camcorders. In essence, the circuit is a standard LM317 adjustable....
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A normal 9V battery would be considered as dead battery when the voltage falls below 7 Volts. With this switching regulator, a lifetime of a 9V battery will....
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The SD1143 transistor provides a gain of about 14 dB in this circuit. It uses the fact that a 175-MHz device has a much higher gain when used at lower frequencies. The amplifier was originally designed to be used with a transverter. ..
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In order to keep the speed of the motor constant when loads are applied, a control application circuit is needed to apply the purpose. The H-Bridge circuit may control the speed and direction of the motor. The below diagram shows H-Bridge with 4 inputs and....
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A high-gain amplifier using a UA741 is used to sense relative voltage drop in a conductor, and therefore current i..
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Owing to the recent launching in Europe of Cranial Electrotherapy Stimulation (CES) portable sets, we have been "Electronically Stimulated" in designing a similar circuit for the sake of Hobbyists. CES is the most popular technique for electrically boosting....
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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....
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PWM circuits are fun. You can use them to dim LEDs, control the speed of fans and motors, control the power going to a thermoelectric cooler, or control the power going to pretty much anything you want. Just make sure that you don`t exceed the maximum....
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Hello Bottleheads, I am building this gain stage from Decware`s Zkit4 to use as a buffer in front of an LM3875 gain clone. The chip amp has plenty of....
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The other thing I thought of is using a phase shift oscillator followed by an inverter to turn the sine into a square wave, but it semms a rather crude solution. I`m also looking for the schematics to a frequencydivider. I know you can use a flip flop to....
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2.4G wireless keyboard receiving portion circuit diagram as follows: ..
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The signal emitted by an IR remote control contains two parts, the control pulses and a modulated carrier wave. The control pulses are used to modulate the carrier, a popular modulation frequency being 36 and 42KHz. The signal is radiated by an IR diode,....
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Multi-Mode Running light in this website is simple with families design circuit diagram of multi-mode running light bidirectional and 3 different modes with versatile various electronics project with description...
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This is Infrared Remote control transmitter circuit has high performance and can be applied to works with the various infrared receiver circuit. To made easily. And best to save your money. - Then another circuits, is designed to have wider applications. Can....
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A very simple circuit of indication of level, with 10 Led. Is used the circuit of half-wave rectification of precision round the IC2, with gain one. With switch S1, we can select the indication of Led. The level of entry is 60 mV-1.25 V..
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This digital voltmeter is ideal to use for measuring the output voltage of your DC power supply. It includes a 3. 5-digit LED display with a negative voltage indicator. It measures DC voltages from 0 to 199. 9V with a resolution of 0. 1V. The voltmeter is....
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This is not a complex function and could be easily coded into a PLD or FPGA. However implementing this function into a small PLD might just use up most of the chip`s I/O pins and defeat the purpose of the PLD. That is; spending more for the PLD, than using....
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I`ve got a button which I use as a push to talk switch. This works for the most part, however when I press the button it takes a good 5 seconds before I hear any output...
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You can divide a large keypad or keyboard into sections of 12 keys each (Figure 1). Each section connects to a separate comparator circuit, which detects a keystroke and generates a trigger pulse using the monostable circuit of IC4, and you can add more....
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Using this circuit you can convert the 12V dc in to the 220V Ac. In this circuit 4047 is use to generate the square wave of 50hz and amplify the current and then amplify the voltage by using the step transformer. Disclaimer All files are found using....
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The Command radio is a description of the radio function, rather than a specific model. The "Command" function was to communicate between aircraft. The "Liaison" function was to communicate back to base. However, functions often become blurred in use, and....
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The following circuit shows about Bedside Lamp Timer Circuit Diagram. This circuit based on the CD4060 IC. Features: LED illuminates for around 25 ....
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It is clearly not a standard astable multivibrator. Does nayone recognize this configuration? I would like to understand it better....
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Two gates, U1A and U1B O/3 of a 4049 hex inveter), are connected in a VFO circuit. Components Rl, R3, and CI set the frequ..
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What I would do is switch the headlight switch ON & OFF and them see if you can "feel & hear" the headlight relay clicking. This is shown in the first schematic, on the left of the diagram. The triangle at the bottom left leads to the two 15 amp fuses you....
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Electronic CD4017, CD4066 constitute the switch circuit diagram: ..
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IC1 forms an oscillator driving the infra-red LED by means of 0. 8mSec. pulses at 120Hz frequency and about 300mA peak current. D1 & D2 are placed facing the car on the same line, a couple of centimeters apart, on a short breadboard strip fastened to the....
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The clock was experimental until I picked up some experience with the circuitry. I experimented with the idea of building an alternating display using two B-5560 nixie tubes but ended up using 4 nixies instead. The original idea was to display the hours,....
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This simple circuit can be used to program the PIC16F84 and similar "flash memory" type parts. It uses a cheap 555 timer IC to generate the programming voltage from a +5V rail, allowing the circuit to be powered from a computer`s USB port. The 555 timer....
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The following circuit shows about Line Follower Sensor Circuit Diagram. Features:Simple circuit, Infra-Red LEDs D1 and D2 will emit Infra-Red ....
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A simple level power meter to provide high-fidelity sound system bar or dot matrix display. Green LED display 0-7; 8 show yellow, red 9, the LED displays peak power. This circu..
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Crystal oscillator circuit consists of several gates as the d Several gates as shown by a crystal oscillator circuit. FIG. (A) to l MHz crystal oscillator circuit, the figure (..
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The design of the charger is similar to that of many commercially available chargers. The charger consists of a mains adaptor, two resistors and a light-emitting diode (LED). In practical use, this kind of charger is perfectly all right. Resistor R1 serves....
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A simple touch dimmer circuit diagram using TT6061 IC, which is a touch control integrated circuit used for Light dimmer circuit and lamp dimmer circuits....
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This circuit is a compact timer circuit that will keep the headlights of your car ON for about 1. 5 minutes and then turns it OFF. This circuit incorporated to your car will help you to access dark places with out the need to come back and turn OFF the head....
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This circuit is intended to indicate the power output level of any audio amplifier. It is simple, portable, and displays three power levels that can be set to any desired value. For a standard HiFi stereo power amplifier like the 25W one described in these....
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The 74L121 and 74L122 ICs pin out diagram works any any style 74xx121 or 74xx122 DIP chip, but the timing graphs are only valid for the TTL families indicated. The 74121 shown above provides a single Monostable Multivibrator function. While the 74122 shown....
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Transistor Ql and resistors Rl, R2, and R3 form a constant current source and the charge current might be adjusted..
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The input impedance of a grounded grid amplifier is typically several hundred ohms. Though most vacuum tube transmitters will have no trouble driving such an impedance, solid state transmitters, which are designed to drive loads that are very close to 50....
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A vibration meter circuit shown in the following schematic diagram uses LM3915 a the main active component. This vibration meter uses a piezoelectric....
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Semiconductor thermistor embedded thermal protection element belongs, it is sensitive to temperature, temperature error of 5. Its reliability, small size (diameter 3. Smm), easy to install, easy to embed winding, use it as a temperature sensing element can..
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Apart from the obvious usage as a headphone amplifier, the circuit can be used for a range of applications where a wide bandwidth low power amplifier is needed. The circuit is based on an opamp, with its output current boosted by a pair of transistors....
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Relays have been around for a long time and though often now replaced with solid state switches, they have unique properties that make them more robust tha....
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The circuit in Figure 2 shows a 16-channel, AMI-encoded RF transmitter for data rates as high as 28.8 kbps. The circuit operates in the unlicensed (FCC Part 15) 902- to 928-MHz industrial, scientific, and medical (ISM) band and is reliable for open-field....
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The laser diode will be forward biased and its cathode (LDC) will connect to a driver transistor &/or network to regulate the LD current based on the photodiode current (feedback network)...
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The frequency of this sine-wave oscillator is determined by a direct voltage, U" of 0 to 15 V. The distortion on..
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Bridge integrated pressure signal conditioner MAX1450 drive circuit diagram composed of: ..
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This project is based on the parametric equalizer proposed by Elektor in the late 80s or early 90s and later published in the book "Creations electroniques" in 1993 (Publisher: Publitronic). Their design involved three stereo potentiometers per channel,....
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This voltage-controlled oscillator circuit is very compact and has a good linearity. The author said that the precision could be better than 0. 01% If this circuit is properly constructed. Moreover, this circuit gives three different output waveforms:....
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This projects builds upon the 2012 LED Flicker project. The goal is to build an ultra bright, multi-channel test light using extremely high power LEDs driven to their maximum rated current, and controlled precisely. By driving an array of 7 ultra bright....
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If you have electronics old equipment, keep many long ago year, unknow build Electronic Project good. I begs for to advise pre tone control circuit this. By....
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Here is probably the best ignition coil driver circuit that I have seen. As far as I know it was designed by Jochen Kronjaeger. You can find the original at Jochen`s High Voltage Page This circuit is designed to run from 230V, but I have came up with a....
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One small spot of rain on the sense pad of this bleeper will start this audio warning. It can also be operated by rising water. The circuit has two transistors, with feedback via capacitor Cl, but Trl cannot operate as long as the moisture sense pad is dry. ..
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A phase shift oscillator, using a CE Amplifier. I have a Vc of approximately 6V, gain of approximately 40(>29, as required). I aim for an oscillation frequency of 1. 5 kHz...
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The signal is encoded as a pair of sine waves, ensuring that no frequency is a multiple of the other and the sum and difference between two frequencies does not match any single tone and that`s why DTMF sounds so ugly!T he DTMF encoder circuit show n here is....
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Ammeter measuring current in the circuit, the need to break the circuit in series in the circuit to be measured. The clamp meter without the need for the case to break the circ..
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This RF inductance meter measures RF chokes in the 500 nH to 50 uH range. I needed a way to measure hand-wound RF inductors in my second lab, and since I would only be doing this occasionally, I didn`t need anything fancy, and since once a friend finishes....
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Schematic and description of a simple mic amplifier circuit. This circuit contains two stages first microphone preamplifier and second audio amplifier using LM386 Amplifier IC....
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Why do I need C1 What does it do I don`t understand their role in the circuit. Why do I need C4 and C5 I don`t understand their role in the circuit c) why doe I need R6 and R8. As for those caps on the power rail, they clean up the signal to make it less....
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An infrared remote control car, the AT89S51 microcontroller as the core controller, DC motor with L289 drivers work to control the operation of car in this section with infrared remote control manual car driving, autopilot, tracing forward and other....
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Circuit LA3600 5 Band equalizer Circuit schematics Circuit Electronics, 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 a....
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Although the 78xx series of voltage regulators are available with different current outputs, you can boost
the available current output with this circuit. A power transistor is used to supply extra current to the load
the regulator, maintaining a constant....
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A crystal tester circuit is very simple, it contains only oscillator and detector inside. This crystal tester circuit uses one transistor for the oscillator and...
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The Oscillator DesignGuide is integrated into Agilent EEsof`s Advanced Design System environment, working as a smart library and interactive handbook for the creation of useful designs. It allows you to quickly design oscillators, interactively characterize....
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This is a great intercom circuit that can be used in many ways. It uses 22V to operate and maybe it will work at a lower voltage (you can try it). For input/output it uses a loundspeaker (20-45 Ohm) on each side....
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Mobile phone, phone battery chargers on hand wearing the souk are quite expensive. This circuit presented at juncture comes so a low-cost alternative to charge cellular phone telephones/battery packs with a rating of 7. 2 volts. You are reading the Circuits....
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Wall sockets supply power in the form of a 230 volt sine wave. The frequency of this sine wave is supposed to be 50 hertz. In other words, the voltage on the socket alternates between positive and negative at a rate of 50 full periods per second. (At least....
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Preamplifier with LA3161 Preamplifiers are used to amplify low level signals such as those from mikes, tape heads before they are fed into power amplifiers. Power amplifiers ar....
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875T and LM3876T same high performance 40W high power amplifier IC. It can 20Hz - 20kHz frequency range within continuous average power output load 8fl deleted, only 0,05% dist..
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IT usesDTMF encoder output dual tone multi-frequency coded signal to modulate the transmitted carrier frequency. It can form a DTMF encoded radio paging system. The circuit uses DTMF encoding UM97085 and decoding circuit YN9101 circuit to form a small....
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This RDF circuit consists of a square-wave oscillator (IC1), which switches two antennas alternately at an audio rat..
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Nowadays using programming pods are commonly accepted and widely used in manufacturing, especially when a new product is introduced and the firmware is in the early development stages. After the completion of all visual and structure tests, the board is....
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In today`s world Personality Power, everyone wants to have a magnetic personality. It`s just the best way to get what you want and who doesn`t want to get what they want? You need to know how to have a magnetic personality and you need to know NOW!....
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A pressure sensor circuit, a pressure sensor is nominal resistance 120n. The amplifier circuit is the use AD521 op amp gain of 100. It consists of Rs/Rc; decision; A/D converte..
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This cell phone jammer is not applicable for use in Europe, Middle East, nor Asia.
The GSM jammer circuit could block mobile phone signals which works on GSM1900 band, also called DCS. For more cell phone jammers check the related posts...
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This DIY 12V to 220V voltage converter is build with CMOS 4047 that is the main component of this small voltage converter that transforms a 12V DC into 220V AC. 4047 is used as a astable mutivibrator, at pins 10 and 11 will have a symmetrical rectangular....
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Tthe circuit has enjoyed popularity as a standalone booster and as a building block in larger circuits. While the circuit has its merits, we decided to further explore it to determine if it was a truly faithful solid-state version of the familiar input stage....
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If you`ve never heard of geocaching, it`s kind of a grown-up treasure hunt you play everywhere in the world. GPS coordinates are given as clues and the players must find the cache box. There is usually a log book to write your name and a small toy or present....