Popular Circuits Page 148
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Discharge before memory circuit Before the memory circuit is considered instantaneous action, the delay reset circuit. When the input signal to one that is action, and start ti..
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The back to back diodes are there because some radios present high voltage transients when switching bands which will lock up the DFD requiring it to be turned off and back on to unlock. If power for the backlit display is to be taken from Vdc when AC is....
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Although a simple crystal oscillator may be built from one comparator of an LT1720/LT1721, this will suffer from a number of inherent shortcomings and design problems. Although the LT1720/LT1721 will give the correct logic output when one input is outside....
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attribution You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). This file contains additional information, such as EXIF metadata, probably added from....
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This is a design circuit for alarm. This circuit is for an anti- theft wireless alarm can be used with any vehicle having 6 to 12 volt DC supply system. The mini VHF FM radio-controlled, FM transmitter is fitted in the vehicle at night when it is parked in....
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In designing logic circuit, it is sometimes necessary to compare values of two digital data. In this case, creating your own magnitude comparator can cause you more logic IC and can consume more time and money. This magnitude comparator IC might help you. It....
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No description available...
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Circuit shown in Figure 3-56. It has both manual and automatic start-up mode. Has KA2, KA3 two relays in the control loop. So cut KM! Before and after turning KMz, after provid..
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Circuit shown in Figure output voltage + 5V, output current of 1.5A power supply. It consists of power transformer B, a bridge rectifier circuit D1 ~ D4, filter capacitor C1, C..
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Here is the circuit diagram of remote controlled appliance switch circuit. The main parts of this circuit are IC1 (NE 555), IC2 (CD 4017)...
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This is a Simple Phono Preamplifier Circuit Diagram. In recent years, following CD`s introduction, vinyl recordings are almost disappeared. Nevertheless, a phono preamplifier is still useful for listening old vinyl discs from a well preserved collection.....
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Did it ever occur to you that an array of white LEDs can be used as a small lamp for the living room? If not, read on. LED lamps are available ready-made,....
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This is a simple capacitance meter which can measure capacitance value easy. There are some measurement methods for capacitance, at one time the capacitance was measured with a impedance bridge or a dip meter. Recently typical capacitance meters can measure....
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Microchip Technology (www.microchip.com) offers a family of cooling-fan speed controllers that operate in PWM mode for use with brushless dc fans (Reference 1). To control fan speed using the PWM waveform`s duty cycle, you can use either an external NTC....
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The figure shows the schematic of the circuit. A number of unique features give this design its trouble-free performance. The tendency for regenerative receivers to radiate oscillator-frequency signals is eliminated here by placing a transistor buffer Q1....
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Whenever I`m in the car listening to my favourite CD, it always happens-my batteries go dead. To solve that problem, I built this extremely simple regulator circuit. It steps down the 12V from the lighter socket to 9V which is used by the CD player.....
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This is NIMH Battery Charger using IC LTC4060 Electro Suite, a NIMH battery charger which is powerful, effective and efficient. Features of the IC LTC4060 is a specialization of a NIMH battery charger. NIMH Battery Charger with IC LTC4060 can perform safely....
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In this circuit, there are two feedback paths around an op-amp. One is positive dc feedback which forms a Schmitt trigger. The other is a CR timing network. Imagine that the output voltage is +10 V. The voltage at the noninverting terminal is +15 V. The....
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I`m afraid the circuit you have there is nowhere near correct. For a start, there is no DC path to the transistor base, so no base bias current is available. Q1 collector and emitter are connected directly to the battery with no intervening impedance, so the....
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NOTE: FOR BRIDGE CONFIGURATION: t install jumpers ju2 and ju4 2.remove j 1)3 3.remove rio 4replace ..
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A 555 timer operating in the astable mode generates the driving pulses and two 4518 dual BCD (binary coded decimal) counters provide the square waves. A TL081 op amp serves as an output buffer-amplifier, and potentiometers Rl and R2 are used in order to....
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A strong anti-interference ability Lu light control delay switch circuit, it needs within a specific time in a row clapping I. lamp lit square Xi, after a delay, lights automat..
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Advanced Melody doorbell is the very interesting project in the series of alarm Circuit diagram with description of melody doorbell using battery instead of AC mains ...
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A 12V 20W halogen lamp (MR16) and a 4. 2Ah SLA battery for my bike light system. The battery has only limited life at this power rating, so I designed this cheap light dimmer to reduce the battery drain and allow for longer rides at night. Based on a simple....
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UM95088 telephone circuit diagram is shown in the above picture. UM95088 is specialized integrated module of dual tone multiple frequency for telephone dialing. It adopts the techniques of CMOS with dual-in-line package of 14 pins...
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The LA3401 is an MPX IC for FM car stereo use. It con- tains the VCO non-adjusting function, skip noise eliminat- ing function, and pilot cancel function and is packaged in a 16-pin SIP. By Sanyo Semiconductor Corporation ..
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Most car door switches are simply single-pole switches, with one side grounded. When the door is opened the switch grounds the other line thus completing the light circuit. In a car where the negative terminal of the battery is connected to the chassis, the....
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This is design circuit for UHF transmitter circuit. The TV transmitter circuit is working on the UHF channel, 470-580 MHz frequency channel 21-34. This transmitter can radiate as far as 30-100 meters by using a cable 10-20 cm. This is the figure of the....
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After TT2 off, the input signal input via chi Az, dry white [input resistance is very high, becomes the same potential, the inverting input terminal must also be associated wit..
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A two battery-powered light touch delay circuit, it can be placed on the bed pillow, nighttime convenience, to touch metal M under the capsule on a small lamp will automaticall..
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The design is based on the previous analysis of calculating the game in a circular shift register. While designing, it occurred to me that small extensions to the design would enable additional game play features, such as replay and manual input. The final....
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The circuit in Fig. 56-lla lights the signal lamp upon detecting a line current consumption of more than 5 mA, and handles currents of several amperes with appropriate diodes fitted in the D1 and D2 positions. Transistor T1 is switched on when the drop....
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This circuit is similar to the LED clock using 12 neon indicator lamps instead of LEDs. It operates from 2 high capacity ni-cad cells (2.5 volts) which keep it going for a couple weeks. High voltage (70 volts) for the neon lamps is obtained from a small....
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Hi guys this is my first tutorial, I`ve just started a few months ago learning electronics (previously I`ve just knew how to program in C and Python)....
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This circuit was designed for use in a hifi showroom, where a choice of speakers could be connected to a stereo amplifier for comparative purposes. It could be used for other similar applications where just one of an array of devices needs to be selected at....
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The receiver ( Figure a) input circuit is supplied by the 60? generator. Low -pass filter allows the entire frequency range with uniform sensitivity. Figure b shows the receiver input circuit coupled with transmitter inductive (Ri = 60?). Figure c shows the....
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This signal generator is intended for realignment of radio receivers. The unit is cheap and fairly basic, but perfectly adequate for its intended purpose. However, the output is not a pure sine wave, so the unit may not be suited for more exacting electronic....
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2000 Plymouth Breeze Dash Light Wiring Diagram...
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This is a design for sawtooth generator circuit. The advantage of this circuit is low cost and produces an auxiliary square wave at the same frequency. This circuit can be used to sweep the frequency of another generator. This is the figure of the circuit. A....
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The application that to you we propose is a simple filter of region that limits the acoustic region (20-20000Hz) in the region 20-100Hz.
With the manufacture that to you we propose you can make a active filter in order to you lead a loudspeaker of very....
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The noise limiter circuit has a preamplifier clipper, and a switchable audio bandpass filter. Audio levels in the 5- to 50-mV range are amplified in a preamp to several volts p-p, fed to a clipper, voice band filter, ..
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RS flip-flop, or reset-set flip flop, is a kind of stable multivibrator with two input, namely reset and set. The output will be at one of two stable states,....
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Power is applied to the circuit with the initiate switch open. The 25-JtF capacitor charges through the A14, or equivalent, diode and 2.2-KO resistor to full supply voltage. When the initiate switch is closed, the low side of the capacitor is suddenly....
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No description available...
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Making 90 degree phase shift on VHF. This IQ Oscillator is easy way with two logic IC`s. 74AC04 inverter is used as oscillate circuit. C5 and R6 is phase shifter. 74HC14 has a duty to convert into square-wave. It is usualy used 74HCU04 in crystal oscillator....
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The frequency range of this amplifier is 1.8 to 54 MHz. The amount of RF drive required for full output is about 30 W...
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A functional block diagram of the MC1428 Monoflop shown a functional block diagram of an integrated circuit MC14528. The IC features two monostable trigger road, more convenien..
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The circuit is quite simple thanks to the use of MAX638CPA 5V CMOS Step Down Adjustable Switching Regulator IC. With this IC input voltage of 12 to 16 Vdc converted into direct voltage 5VDC. You can see here is only using 9 additional external components to....
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The ground side of the speaker is connected to the junction of two equal high value capacitors (1000 µf is typical) across the supply. The amplifier output voltage will be Vs/2, and so will the voltage across CI (if CI and C2 are equal); so as the supply....
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TDA7000 FM Radio Receiver Circuit Using Tuning Capacitor GENERAL DESCRIPTION The TDA7000 is a monolithic integrated circuit for mono FM....
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The TDA7294 is a Hi-Fi amplifier and can give 100W RMS but with 10% distortion. Supplying 30 Volts you can have 50 Watts RMS with 1% distortion. Frequency range start at 16Hz and can reach 100KHz. Make sure you are using good heatsink. The chip supports mute....
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Using the new VIPer12A and VIPer22A software To supply the large number of electronics components required for home appliances, different power supply topologies can be used. We....
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On the bottom you will see a 74AC125 which is a Quad Buffer with Tri-State Outputs. I`ve seen quite a few buffers like this on programmers. but im not exactly sure what they do Im assuming whatever "CTL" is controls the "state" of the buffers. but what....
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Our project demo is also successfully finished and the only thing left to do for this project is the final project report which is due June 15 since we are integrating that report with a conference paper. This is the last update I`ll be making to our....
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Adjustable 5A Step Down 5 MHz switching regulator circuit can also be used to overcome such problem. It uses ST1S03 step down DC-DC converter.The ST1S03 can also be used to power low-voltage digital core in HDD application. With input voltage range 3V to....
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This project documents how to build and construct your own Brushed Motor ESC for Cars and Boats using a Microchip 12F675 PIC and a small number of standard components. This ESC grew out of an earlier aircraft ESC. A number of people asked for an ESC with....
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Here is a simple oscillator circuit that varies the duty cycle over a wide range without affecting the frequency. It is a variation of the simple 555 astab....
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Restricting the resistance values between 1 k © and 100 k © for the sake of obtaining accurate voltage and current readings with your meter. With very low resistance values, the internal resistance of the ammeter has a significant impact on measurement....
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This circuit is very basic to build and puts out great power for your car or home. Keep all leads as short as possible...
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Can be directly connected to CD players, tuners and tape recorders. Simply add a 10K Log potentiometer (dual gang for stereo) and a switch to cope with the various sources you need. A correct grounding is very important to eliminate hum and ground loops.....
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Circuit is shown. It consists of language and sound circuit FM transmitter circuit. Its circuit is simple and easy to manufacture. It is with an ordinary FM (FM) radio compatib..
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A cat deterrent with an Arduino, something akin to this. I have figured out detection, and now realize that I need to use an ultrasonic transducer to produce the `blast` that I need...
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ESP Lighting Information Page - Dimmers, electronic transformers, etc. - how they work, what`s wrong with them and how it can be fixed....
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Amateur Radio Transmitters using valves such as 807 or1625 works well with a plate voltage between 600V to 700 Volts.The circuit described here is a full wave voltage doubler. The output voltage is twice the input voltage. For 230V AC input the output will....
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Each components of the circuit is shown in a simple block form with a corresponding label for identification purposes, using no special symbols or language and the interconnections of these components are represented by solid lines. You can read the block....
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I`m designing a circuit to drive a 4x7 segment display using a PIC. I`ve done this in the past without any drama. I would just use four pins to control each of the four digits (one each). I`d switch one digit on, wait a bit, turn it off, then switch the....
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100kHz-30MHz active antenna with small size, good performance, making simple, low cost and so on, the most suitable for remote medium wave and short-wave radio reception. As sh..
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Solar Cells Light-Sound Converter. This is experimental circuit that converts light into sound....
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This very simple alarm circuit is sure to have the police beating a path to your door - however, it has the added advantage of alerting you to their presence even before their footsteps fall on the doormat...
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This circuit is intended for precision centigrade temperature measurement, with a transmitter section converting to frequency the sensor`s output voltage, which is proportional to the measured temperature. The output frequency bursts are conveyed into the....
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Gates U1-a and U1-b of the 4093 quad 2-tnput NAND Schmitt trigger are connected in variable, low-frequency, square-wave oscillator circuits. The output of gate U1-a is connected to one of the inputs of gate U1-b. The square-wave output of gate U1-a modulates....
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The article "Creating a Line Follower Robot with AVR [Censorship]" is a continuation of Line Follower Robot article with a new AVR ATMega8535 samapai phase Li..
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Maxim's MAX038 function generator chip is capable of producing nearly constant amplitude sine, square, and triangle waves with a low output impedance, from a very low frequency to more than 20 MHz. Basically, a function generator on a chip. Here is a....
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The operation of the unit revolves around three !Cs: a 4093 quad NAND Schmitt trigger, a 4066 quad analog switch, and a 7555 timer. When a high is fed to probe 1 in, it is inverted to IC1a and once again by IC1b, so that the input to IC2a is high. Thathigh....
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Most of us don`t have the luxury of building a 1/4, 1/2 or even a 5/8 wavelength vertical antenna for HF. We have to settle for something a little shorter. (A lot shorter, in the case of people following the FCC`s Part 15 rules, which limit them to 3 meters....
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As shown for the configuration of the variable gain A709 differential amplifier circuit. The biggest advantage of the circuit is in keeping CMRR KCMR same premise, continuously..
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This is the second generation of a circuit for a guitar spring reverb pedal, it has dry, wet, and drive controls for a wide variety of sounds. With a decent reverb spring (tank) in overdrive, this circuit will produce an incredibly thick and grungy sound,....
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The slot machine`s realistic action is provided by seven ICs and three displays, as shown. Two 555 CMOS timer ICs generate pulses. IC1 is used to generate the clock pulses for the entire electronic slot machine. The pulses are coupled from the output (pin....
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Adjustment potentiometer RP, the voltage on the load Rfz Uh set value. By RPz real now closed loop control. Open-loop control works, as long as the feedback voltage Uf ground c..
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Device such as burglar alarms and sirens, whose basic purpose is to monitor tested circuit diagram with description of burglar alarm alarm using dual operational amplifier...
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The zener breakdown of a transistor junction is used as a noise generator. The breakdown mechanism is random and this voltage has a high source impedance. By using the op amp as a high input impedance, high ac gain amplifier, a low impedance, large signal....
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A PWM boost converter in a simple controller has a DC path from input VIN to VOUT, which is utilized for high-efficiency power conversion....
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Digital IC, Door Knob alarm Here is circuit if you want an alarm to be sounded when somebody touches some thing. If any body touches say, the door handle, buzzer inside rings. But....
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A pulsating light for a certain signaling. Voltage was 230V. So I decided to make a simple circuit, consisted of a LED diode, two capacitors, two resistors, a diac and a diode. Activity of the circuit is extraordinarily simple. The capacitor charges by the....
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Where can you obtain a 12AX7 tube, you ask These tubes are very popular for use in the "preamplifier" stages of many professional electric guitar amplifiers. Go to any good music store and you will find them available for a modest price ($12 US or less). A....
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As shown in FIG PGA103 constituted by a wide input voltage range of the amplifier. 11.3k with 102k resistor voltage divider circuit dividing ratio of about 1/10, such as when t..