Popular Circuits Page 235
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The method in Figure 1a needs no access or knowledge of the communicating devices. A C program opens two COM ports and installs interrupt-service routines for IRQ4 and IRQ3. Upon the reception of an interrupt, the routine stores a byte in a common circular....
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Display circuit as shown in a typical digital massager. The core of the control circuit is a microprocessor EM78156, it then received instructions manual operation of the circu..
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Ultra-low EMI, Mono and Stereo, Class D audio power amplifiers provide Class AB performance with Class D efficiency. Maxim`s spread spectrum modulation (SSM) along with 3rd generation EMI reduction techniques reduce EMI radiation by lowering the high....
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The circuit shown in this paper uses 12 components to form a miniature wireless FM microphone with stable operating frequency, and its transmitting distance is about 30 meters and more than 100 meters at 6V power supply.The circuit is shown as Figure, BG1,....
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This is a beta release of the PIXpand project. The PIXpand which is a device that connects to a TI calculator and enable it to store and retreive data to and from Playstation Memory cards. I am making this beta release as I do not have the time to continue....
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Female textile machine power control circuit shown in a diagram, VTH1-VTH3 is TRIAC, R, and C is the absorption line, Rz is triggering the current limiting resistor, Kl is to s..
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This transmitter consists of 5 in total bulbs. 6L6 works as an oscillator. Subsequently the oscillation is guided to the guide grid of 807 which acts as the ultimate amplifier and is the transmitter output lamp. The amplifier consists of the ECC83....
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In this circuit, an LM741 op amp drives a Wien-bridge network using two zener diodes as..
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Fans (Ceiling) Fifth gear speed control circuit shown in Figure 3-6. It uses capacitor step-down, three-terminal fixed 7806 integrated steady voltage regulator Ai regulator to ..
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High linearity analog optocouplers provide the versatility required to meet a wide range of analog isolation needs. For designers of high voltage applications, high linearity analog optocouplers can reliably send analog signals across very high voltage area....
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Have you ever wanted to run a TV, stereo or other appliance while on the road or camping? Well, this inverter should solve that problem. It takes 12 VDC and steps it up to 120 VAC. The wattage depends on which tansistors you use for Q1 and Q2, as well as how....
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When you need a precision peak detector, you would usually implement it with one or several op amps and a few other associated components. This technique usually works well unless your design requires operation higher than a few kilohertz. In designs....
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A circuit that allows you to control a relay in response to sound from a non-amplified sound source (computer, CD player, or my Digital Sound Recorder board). This circuit accepts audio input from any non-amplified sound source and when the volume reaches a....
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This is a circuit which is a modification of Hartley oscillator with the addition of several components. This circuit uses a small audio transformer, type....
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As shown for the basic connection circuit INA326/327 signals and power. Selection of the highest accuracy 0.1 F capacitor as power supply filtering, and should be as close to t..
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The Cmos 4060 IC has two built-in inverters - at pins 9, 10 and 11. They must be wired together to form an oscillator - the output of which is at Pin 9. While the oscillator is running - Pin 9 is switching continuously from high to low and vice-versa. It`s....
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Linear battery chargers are typically smaller, simpler and
less expensive than their switcher-based counter parts,
but they have one major disadvantage: excessive power
dissipation when the input voltage is high and the battery
voltage is low (discharged....
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The circuit is here as it is of high educational value. I have not tested it. You can `simulate and test` or `wire it up and try` and let me know how it worked. The Circuit is also a simple analog to digital converter. You can use optos in place of LEDs. T1....
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This is a wide band signal strength meter circuit which responds to small changes in RF energy, designed to be used for the VHF spectrum and will respond to AM or FM modulation or just a plain carrier wave. This circuit measures radio field strength by....
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I am feeding that box with 12 volts, and it has a sequencer board, some external relays to drive the coaxial relays, preamp and the amplifier. As you can see, this sequencer board has some DIL relays, they are only intended to drive external relays that....
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Using the following circuit, with 12V appplied to the motor, and either high (5V) or low (0V) to each transistor through a 1k resistor. The transistors used are TIP 142 and TIP 147. The diodes I am using are 1N5817. When I apply 0V to R2, R1, and 5V to R3,....
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J201 JFET works best at 10 volts. The minimum current is 0. 5 mA. These are all ideal specifications. The specification spread of FETs is normally three to five times. I`ve personally seen a five-X variation in brand-name devices. The devices that I`ve....
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Here is a circuit Power Amplifier with output power of more than 600 Watt speakers with impedance of 4 Ohm. Power Amplifier circuit with high power uses n-channel MOSFETs 6 in the output stage alone is giving about 400Watt power. And to make more than....
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This simple circuit can be wired into your headlight switch to provide automatic switching between high and low beam headlights when there is oncoming traffic. Simple electronics project with circuit diagram....
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This simple LED flasher circuit will turn ON and OFF two LED alternatively. The first LED will turn ON when the second LED is OFF for some period, then the....
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This is a universal four-digit keypad-operated switch - with a difference. Instead of entering the security code one number at a time - the four keypad buttons must be pressed simultaneously. In other words - the four numbers must be entered in parallel. The....
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VU Meter Driver PCB Completed Board Stereo for Two VU Meters Audio Amplifier. VU Meter Driver PCB Completed TA7318P Board Stereo for Two VU Meters Features : Specifications:Power voltage: AC 20V to AC 26V(not more than 26V)size : 52 x 67 x 32mmIt can connect....
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C1 = 3 750 pF 500 V silver-mica capacitor. C2= 100 pF preset capacitor (Jackson C803). C3 = 75 pF variable capacit..
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A place to share and discover articles and documents. Upload what you know, share with others, or just find some articles by searching from our database....
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The circuit diagram and detailed explanation of a simple aircraft radio circuit is given below....
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Short-wave listeners often are not able to, or allowed to, install a long-wire antenna or other large dimension antenna in or around the home. In such cases, the present active antenna, intended for the frequency range 3 30 MHz, may be found useful. The....
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Tihs circuit has: automatic switch on on rear gear. led-bargraph display. audible bleep on last led. "good old" design style, no microcontrollers! Based on an ultrasonic amplifier from an article seen on a 1982 magazine, it was once installed on the rear....
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The Arduino 2009 acts as a standalone weather station. It does not display the data. It can operate independently for months. It samples the sensors until the RAM is full. The RAM samples are stored on a sector of an SD card. Eventually, a year`s weather....
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When operating, a waveguide directs energy onto a crystal detector. The diode shown is for X-band operation. The waveguide is a 1H inch piece of plastic tubing with the ends flared. The plastic is coated with an elec-troless copper solution to provide a....
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The Camera Head (A2075) is a LWDAQ Device that controls and reads out a single ICX424 image sensor. The circuit provides a socket into which we can solder the sixteen-pin sensor directly. It provides a twelve-way flex socket to which an auxiliary board....
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This circuit is a simple, low noise guitar conpressor...
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SCR TESTER CIRCUIT The Device under test cathode, anode and gate are connected to the unit`s CATHODE, ANODE and GATE terminals,....
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A single 6.75 V mercury battery powers the counter, which features a 1 mA count-rate meter as well as an aural output. A regulated 900 V supply provides stable operation of the counter tube. A multivibrator, built around a differential power amplifier IC2,....
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The following circuit shows about 2 Way Switch Wire Electrical Circuit Diagram. Features: for switch on the lights using S1, three terminals ....
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This figure shows the schematic diagram of the simple inductance meter. U1, a 74LS00 two-input quad NAND gate logic integrated circuit, two resistors, a capacitor, and a surplus microprocessor crystal form a stable crystal oscillator near the marked....
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An LED Thermometer which can be used as a temperature sensor or temperature measurement circuit built using LM 34 -a Fahrenheit display or LM 35-degree Celsius display of temperature....
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Extract of another SC article which deals with a simple programmable TCI with nearly the same trigger input circuits than DIY-CDI. Good for us, the trigger circuits are describted in more details than the DIY-CDI article. The DIY-CDI will not only will work....
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An FM radio on a single chip requiring only a few simple peripheral components. In particular the ship requires only one simple coil and alignment is very easy. The chip includes an RF input stage, mixer, local oscillator, IF amplifier/limiter, phase....
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Cell phone jammer is an electronic device that blocks the transmission of signals between the cell phone and its nearby base station. By using the same frequency as the cell phones, the cell phone jammer creates strong interference to the communication....
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Analog peak detection is accomplished hy repeatedly measuring the input signal with an a/d converter and comparing the current reading with the previous reading. If the current reading is larger than the previous, the current reading is stored in the latch....
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The continuity tester is a handy adjunct to an ohmmeter. The unit or component whose continuity is to be checked is connected between terminals E1 and E2....
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You will need this project when you have an extra mobile battery or you need to charge any lithium, Lithium ion or Lithium Polymer battery. Maximum c....
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Start within 16W2D single ended energy saving lamp dedicated electronic ballast circuit shown in Figure, RFI filter circuit consists of 1-60 wave,..
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The second circuit simulates the siren of an American police car. It uses two 555 timers in the circuit. The 555 on the right is wired as an alarm tone generator and the second 555 timer on the left is wired as a low frequency astable timer which generates a....
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First I tried connecting the circuit to a 9V battery. (Multimeter reads around 8. 3 Volts, which is in the operating voltage range of the LM386 as per datasheet) The result I have is lots of noise, sometimes cracks and pops and a barely audible sound of the....
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Delay action, the instantaneous reset control circuit is divided into conducting pipe rechargeable delay circuit, tube cut-off control rechargeable delay circuit and a delay ci..
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This type of design can produce a very high amperage current for a faction a second that can used to do some useful work if properly harnessed.
A point to remember is that Paul Baumann built his first device in prison and as such did not have access to....
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Ian I got some hedges from the local motor repair place and also they gave me a large flat sheet of the stuff before I left. After having to re-bend a ....
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Hi guys..!!this is my 1st easy cheap n simple instructabel u need following components for laser burglar alarm-1. LDR or photocell 2.printed circui....
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Using the UM3561 integrated circuit can be designed various alarm systems using few electronic parts. This UM3561 alarm electronic project require few electronic parts and is powered from a simple 3 volts dc power supply. ..
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This circuit operates with 230v. you can use this circuit to decorate your parties. I think this will be a wonderful circuit to you all. Here DIAC ER 900 and Triac BTW 11-400. ..
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The designer requires 1 Wire host computer IO framework of adopting the drain and opening a way, work in 1. 8V. Majority 1 Wire is unable to work in 1. 8V from the device. Note of this application has recommended realizing 1. 8V 1 Wire host computer and 5V 1....
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Circuit works The liquid level automatic controller circuit from the power circuit, control instruction level detection circuit, the starter control circuit, as shown in FIG. F..
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With two light barriers closely positioned one after the other it is possible to establish in which direction they have been crossed. If, for example, you place it at the entrance of the toilet then you can use it to control the lights: on when entering and....
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This voltage regulator circuit can deliver up to 3A at 12V output voltage. The circuit can be employed on occasions when a current of more that 3A is demanded for regulator. IC regulators of such high current rating are pretty hard to find. The transformer....
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This voltmeter exploits a number of tbe CA3160 BiMOS op amp"s useful characteristics. The available voltage ranges from 10 mV to 300 V. Powered by a single 8.4-V mercury battery, this circuit, with zero input, consumes approximately 500 p,A. ..
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The GDO originally used a triode vacuum tube configured as an oscillator, with a sensitive DC current meter measuring its grid current. Most versions found today are solid state (JFET) and have no grid (or grid current), but the name has stuck. This....
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The power supply is a vital but often neglected part of any electronic product. It is the interface between the noisy, variable and ill-defined power source from the outside world and the hopefully clear-cut requirements of the internal circuitry. For the....
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Low Ripple Regulated Power Supply Circuit Diagram This circuit may be used where a high current is required with a low ripple voltage (such as in a high powered class AB amplifier when high quality reproduction is necessary ). PARTS LISTR12....
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This adapter circuit, based on a dual four-channel analog multiplexer handles digital signals to at least 1 MHz, and analog signals at least through the audio range. The dual multiplexer's upper half selects one input for display. The lower half generates a....
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That circuit is based on a 14-pin DIL IC capable of producing sine, square, triangular, sawtooth and pulse waveforms of high accuracy and stability. The frequency may be selected to be from 0.001Hz to 1Mhz, Frequency modulation and sweeping can be....
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There are two ways to overcome the effect of gravity using electromagnetic forces:
1. Using a rotating magnetic field and a radial current flow. The force is in the direction of vB q , so out of the page for the configuration shown in Fig. 1. Electron....
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It is a low frequency Wiew bridge sinusoidal oscillator for the audio range with very low distortion, useful to test a variety of audio equipments. The circuit has been fully tested and a PCB circuit board is available to easily mount all components. The....
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The last section presented a number of basic free-air laser light communications projects. You learned how to modulate a He-Ne laser beam using a transformer, transistor, and even a piece of Mylar foil stretched in a needlepoint hoop. You also learned....
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Portable loads such as video cameras, halogen flood lights, electrical irons, hand drillers, grinders, and cutters are powered by connecting long 2- or 3-core cables to the mains plug. Due to prolonged usage, the power cord wires are subjected to mechanical....
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Many RC oscillators use the advanced circuits in the phase shift unit. They use the voltage feedback amplifier, and the gain of the voltage feedback amplifier will reduce sharply in the high frequency, and gain will stop, when it has not reached the high....
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Special tabbed-resistor geometries (improving time stability), full input protection from damage due to static discharge by diode clamps to V+ and ground, large IOUT1 and IOUT2 bus lines (improving superposition errors) are some of the features offered by....
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This circuit generates a good 1KHz sinewave using the inverted Wien bridge configuration....
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Colpitts oscillators are somewhat similar to the shunt fed Hartley circuit except the Colpitts oscillator, instead of having a tapped inductor, utilises two series capacitors in its LC circuit. With the Colpitts oscillator the connection between these two....
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The zener provides a constant voltage of 20 V to unijunction transistor Ql, except at the end of each half-cycle of the input when the line voltage drops to zero. Initially, the voltage across capacitor Cl is zero and capacitor C2 cannot charge to trigger....
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150W power amplifier circuit diagram based power transistor TIP41/TIP142/TIP147.It is easy enough to built without PCB. The power output range is about 100-150W...
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This is a 35.3 to 10.7 MHz converter circuit. It converts the 35.3 MHz signal coming from a VHF/UHF tuner down to an FM tuner to decode the TV audio in FM....
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The first time you sign into developerWorks, a profile is created for you. Select information in your profile (name, country/region, and company) is displayed to the public and will accompany any content you post. You may update your IBM account at any time.....
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Need some program to set it`s channels to the maximum level, or write the full scale to the DAC. Looking at the MD schematics, you`ll see that the audio is mixed together with relations of 0. 0431 for the PSG, 1 for the YM and 0. 0468 for the external audio....
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The analog input is first fed into a fast non-inverting buffer amplifier (OPA353) set up for unity gain which protects the analog-to-digital converter from out-of-range voltages. The ADS830 is a fairly cheap 8-bit analog-to-digital converter which supports....
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At present, it is numerous to adopt the telephone line as long-range control and alarm system of the transmission medium, associated too more research [1, 2 ]. This kind of system is generally made up of alarm device and calling the police to accept the....
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Most of people ask TV transmitters. So Today I`m going to give you a very useful circuit diagram. By using this circuit you can send your signals 75m to 100m. This circuit diagram is not my own circuit one of my friends gave me this. I suppose you guys also....
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A PIN photodiode, four low-noise op amps and a comparator are used to detect individual photons of gamma radiation. The schematic, design considerations and component selection are discussed....
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Common non-sinusoidal oscillator circuit, waveform and frequency formula - sawtooth oscillator - use multivibrator ..
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Applications 900 MHz ISM Band, Satellite TV LNB IF Amplifiers (950 - 2150 MHz), 1575 MHz GPs 2. 4 GHz ISM Band (802. 11 b/g WLAN, Cordless, etc. ), "SDARS" Satellite - based Radio (2. 33 and 2. 6 GHz), 5 - 6 GHz WLAN (802. 11a), 5 GHz Cordless Phones, etc.....
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This allows up to 8 analogue inputs (with a range from 0 to 5 volts) to produce selectable MIDI control output commands. The analogue inputs could be rotary or slider potentiometers which are connected to 0 to 5 volts. Also the inputs could be connected to....