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  • Delayed Pulse Generator Circuit

    2017-08-19 23:53:2361

    Three 555 IC timers are used in this circuit to construct a simple delayed-pulse generator. IC1 acts as a waveform shaper to produce a rectangular wave...

  • Laser diode pulser

    2017-08-19 23:43:0160

    This drive is capable of driving the laser diode with 10 ampere, 20 ns pulses. For a 0% duty cycle, the repetition rate will be 50 kHz. A complementary...

  • 40Mhz-universal-counter

    2017-08-19 23:39:0962

    This circuit can be used to measure frequencies up to 40 MHz. To obtain the correct measured value, it is necessary to divide the oscillator frequency ...

  • Fiber-optic-link

    2017-08-19 23:32:4760

    The circuit shows a simplex fiber link between the NE5080 transmitter and the NE5081 receiver. The components shown are for a center frequency of 5 MHz...

  • 10Mhz universal counter

    2017-08-19 23:07:3061

    This is a minimum component complete Universal Counter. It can use input frequencies up to 10 MHz at INPUT A and 2 MHz at INPUT B If the signal at INPU...

  • Simulated inductor

    2017-08-19 23:03:2460

    With a constant current excitation, the voltage dropped across an inductance in-(in creases with frequency. Thus, an active device whose output increas...

  • Demultiplexer

    2017-08-19 22:34:5260

    This circuit reconstructs and separates analog signals which have been time-division multiplexed. The conventional method, shown on the left, has sever...

  • Picoammeter-circuit

    2017-08-19 22:20:4059

    This circuit uses the exceptionally low input current 0.1 pA of the CA3420 BiMOS op amp. With only a single 10-MO resistor, The circuit covers the rang...

  • Timed Safety Circuit Circuit

    2017-08-19 22:02:2560

    When SI is closed, pin 9 of Ul goes low, turning on Ql for a preset period. If S2 is closed during this period, Q2 is turned on for a preset period. Rl...

  • Frequency-counter-preamp

    2017-08-19 21:57:5360

    By using the preamplifier with a short length of shielded cable and clip leads, signals that generally could not generate a readout, generate precise a...

  • Attendance counter

    2017-08-19 21:51:2760

    The display shows each increment. By using mode 2, external debouncing of the gate switch is unnecessary, provided the switch bounce is less than 35ms....

  • Capacitive load driver

    2017-08-19 21:48:1960

    The circuit employs a 100 ohm isolation resistor which enables the amplifier to drive capacitive loads exceeding 500 pF; the resistor effectively isola...

  • 3-Wire Receiver/Message Demuxer

    2017-08-19 20:54:2860

    This 3-wire receiver checks the first four data bits of 16 received bits against a preset address. If the t wo match, the remaining 12 bits are latched...

  • Implantable-ingestible-electronic-thermometer

    2017-08-19 20:35:5460

    This oscillator circuit includes a quartz crystal that has a nominal resonant frequency of 262,144 Hz and is cut in the orientation that gives a large ...

  • Fet voltmeter

    2017-08-19 20:31:5761

    This FETVM replaces the function of the VTVM while at the same time ridding the instrument of the usual line cord. In addition, drift rates are far sup...

  • 455Khz Am IF Signal Generator

    2017-08-19 20:12:3259

    An MPF102 FET oscillator drives a dual-gate MOSFET buffer. The MPF102 is configured as a Hartley oscillator. If desired, an audio voltage can be couple...

  • Precision RTD signal conditioner

    2017-08-19 20:05:5459

    The circuit provides complete, linearized signal conditioning for a platinum RTD. This LTC1043 based circuit is considerably simpler than instrumentati...

  • Laser-diode-pulsers

    2017-08-19 19:56:4359

    The laser diode?·pulser is a simple drive circuit capable of driving the laser diode with 10-A, 20-ns pulses. For a 0.1 % duty cycle, the repetition r...

  • 650Mhz amplifying prescaler probe

    2017-08-19 19:28:2759

    The 650 MHz Prescaler Probe's input is terminated by resistor Rl and is fed through Cl to the diode limiter composed ofD1 through D4. Those diodes are ...

  • 741 Timer

    2017-08-19 19:22:3359

    Rl and R2 hold the inverting input at half supply voltage. R4 applies feedback to increase the input impedance at pin 3. Pin 3, the nonin-verting input...

  • Analog multiplexer

    2017-08-19 19:21:0959

    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 th...

  • Low-Drift Dc Voltmeter Circuit

    2017-08-19 18:56:2659

    This voltmeter uses a pair of JFETs in a balanced-bridge source-follower amplifier circuit. Q1 and Q2 should be matched within 10% for IDSS. This minim...

  • Adjustable-delay

    2017-08-19 18:53:1959

    You can obtain well over 360?° of phase delay by cascading two monostable multivibrators. In a typical configuration, a single monostable multivibrato...

  • Watch Tick Timer Circuit

    2017-08-19 18:43:1859

    This circuit adapts a frequency counter to measure intervals. It was originally used as a shutter speed checker for a photo application. The watch tick...

  • Sample-And-Hold Circuit Ii Circuit

    2017-08-19 18:42:3559

    Driving a D/A converter with an A/D converter provides an overall analog-hold function, which though limited in output resolution, offers zero voltage ...

  • Timer 1 Minute To 400 Hrs Circuit

    2017-08-19 18:42:1159

    This ultra wide range timer uses a 555 timer base, two 4017Bs and a 4020B that act as frequency dividers that can be switched in and out. SI is a SP3T ...

  • Window Comparators

    2017-08-19 18:38:1859

    In Fig. 104-3(a), when Vin is between reference voltages Vi and Vu, output Vout goes low. If Vin>Vl, IC2 produces a low . Because IC1 outputs low, if V...

  • Fet-voltmeter

    2017-08-19 18:13:1259

    A2N3819 FETprovides a solid-state VOM. The 2N3819 acts as a cathode follower in a VOM. The bias offset (meter null) is obtained with R14 and R12 sets f...

  • Uhf Motion Detector

    2017-08-19 18:07:4459

    The UHF motion detector operates on the Doppler radar principle. Ql is an oscillator that creates a radiated signal. An object in the radiated field re...

  • S Meter For Communications Receivers Circuit

    2017-08-19 17:53:1859

    Because many amateur receivers are fitted with an S meter that functions far from logarithmically, the proposed circuit should be a welcome extension o...

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