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  • TONE_ENCODER

    2014-11-22 08:49:16120

    A basic twin-T circuit uses resistors for accurately setting the frequency of theoutput tones, selected by pushbutton. Momentary switches produce a ton...

  • Complete_TV_sound_system_that_provides_approximately_2_watts

    2014-11-22 07:53:15102

    Complete TV sound system that provides approximately 2 watts ofaudio power.Sound detection is accomplished through a coincidence discriminatorin thechi...

  • Three-tone electronic doorbell 2

    2014-11-22 06:00:0571

    The three-tone electronic doorbell circuit consists of the coding triggered circuit, multi-tone generator and audio amplifier circuit, and it is shown ...

  • The domestic experiment electro medical apparatus circuit

    2014-11-22 04:25:4167

    The domestic experiment electro medical apparatus circuit The audio signal output by the integrated circuit is amplified by BG, and the voltage boosted...

  • Flyback Type Converter Circuit Composed Of MAX5021

    2014-11-22 03:11:08118

    The picture shows the flyback type convertor composed of MAX5021. The MAX5021 is a isolated power PWM current-type integrated controller with wide inpu...

  • TUNED_PLATE_TRIODE_POWER_OSCILLATOR

    2014-11-22 01:56:18116

    Drives ultrasonic transducer at odd harmonically related frequencies in 900 kc to 5 Mc optimum range, for neurosurgery, al power levels within 1 db of ...

  • PULSER_FOR_250_KW_MODULATOR

    2014-11-22 01:24:53101

    Trigger generator for scr modulator uses, two-layer and four-layer diodes to provide pulse burst, repetition rates up to 25 kc.-H.G. Heard, Controlled ...

  • Parallel High-Speed Current Driver Circuit Composed Of OPA66

    2014-11-22 00:33:54100

    The picture shows the parallel high-speed current driver circuit. The input signal Vin is added to the OPA660 device's equivalent special transistor OT...

  • 45_MHz_color_TV_sound_IF_amplifier_using_ECG703A

    2014-11-22 00:33:36113

    4.5 MHz color TV sound IF amplifier using ECG703A. In a color TV the 4.5 MHz IF is not generated in the video detector as in BW sets. A separate transi...

  • FAHRENHEIT_CENTIG_RADE_LED_THERMOMETER

    2014-11-21 22:24:04157

    National LX5700 temperature transducer provides input for code conversion circuit driving 3-digit LED display indicating temperature range from -40℃ ...

  • Wireless two-tone electronic doorbell circuit diagram

    2014-11-21 22:21:1686

    Transmitter: Pressing the SB will make the transmitter circuit work. D1, D2 and R2, R3, C4 constitute a low-frequency oscillator to control the audio o...

  • Long_life_circuit_for_an_incandescent_lamp

    2014-11-21 22:11:19110

    This circuit shows an MKP9V270 SIDAC used to phase-control anincandescent lamp,thus lowering the RMS voltage to the filament and prolongingthe life o...

  • LOW_NOTE_SIREN

    2014-11-21 21:14:43114

    Produces up/down blooping sounds characteristic of European police cars and now being used on some US emergency vehicles. Can be connected to burglar o...

  • AUTOMATIC_BRIGHTNESS_CONTROL

    2014-11-21 21:05:56113

    Automatic brightness control circuit intensifies scanning spot when sweep is triggered, and holds intensity constant. When spot is quiescent, output of...

  • Resistor color code and letters

    2014-11-21 18:13:57137

    Resistor Color Code Table For decoding the color code of resistors we need to know how to interpret the table bellow The first two colors market on the...

  • Wideband_log_IF_strip

    2014-11-21 17:23:4880

    The SL1615 shown in this figure is a bipolar wideband amplifier for use in successive-detection log IF strips....

  • Four_quadrant_multiplication_with_the__in_bipolar_operation

    2014-11-21 15:47:3595

    Four-quadrant multiplication with the AD7520 in bipolar operation. The Intersil AD7520 is an 18-pin multiplying D/A converter. A logic one input at any...

  • Auto saving alarm working principle circuit

    2014-11-21 15:38:24109

    Working principle: When people arewalkingor working,thebody will move more or less, when wearer is faint or totally stops movement, the saving alarm ca...

  • PILL_TRACING_INTEGRATOR

    2014-11-21 14:09:4288

    Voltage proportional to speed of travel of pill-sized radio transmitter in human body is integrated in quantizing circuit that delivers number of pulse...

  • PC electrically isolated RS422 interface using SN75176B or M

    2014-11-21 11:52:50221

    PC electrically isolated RS422 interface using SN75176B or MAX48 The MAX485 is low-power transceivers for RS-485 and RS-422 communication. IC contains ...

  • Simple_dc_power_control

    2014-11-21 11:17:20162

    This circuit shows a simple dc full-wave control scheme that uses an SCR and an SBS. Control is obtained by varing the 100-kΩ pot. Notice that R1, can...

  • ORGAN_VOICING_PANEL

    2014-11-21 09:59:37135

    Contains formant filters that transform sawtooth generator signals into waveforms of various instruments. 19 different tone colors or timbres are avail...

  • EMITTER_FEEDBACK_PEAKING_GIVES_100_MC_BANDWIDTH

    2014-11-21 09:09:38113

    Four identical AF102 stages amplify pulse output of delta modulator in tv waveguide link.-C. Kramer and J. C. Balder, Delta-Modulated Television Wavegu...

  • The symmetrical double T circuit to improve the notch filter

    2014-11-21 08:00:26110

    Figure 1 is an example of the symmetrical double-T circuit. Under careful observation, we found that it is circuit synthesis of low-pass filter and hig...

  • Ac_coupled_video_amplifier_with_high_input_impedance

    2014-11-21 04:42:08104

    This circuit can be used in ac applications, such as in video amplifiers and active filters. The circuit uses boot-strapping to achieve input impedance...

  • Low Noise Convertor Circuit Composed Of LT1777

    2014-11-21 03:04:51101

    The picture shows the convertor circuit composed of LT1777. This is a low noise non-isolated buck type DC-DC convertor with output of 5V/400mA. The LT1...

  • One_quadrant_multiplication_using_a_DAC_IC10BC_D_A_converter

    2014-11-21 02:07:15104

    One-quadrant multiplication using a DAC-IC10BC D/A converter and AM-452 op amp. See coding table. With VIN connected to pin 16 the input impedance is l...

  • Glanz WD900B Microwave Oven Defect Circuit

    2014-11-21 01:34:2075

    By detailed analysis according to the circuit (shown in the picture), its is tested to know that the S1 would be disconnected when openning the oven do...

  • Squarer_circuit_using_an_AD533_multiplier_divider_chip

    2014-11-20 23:49:4993

    Squarer circuit using an AD533 multiplier/divider chip. With X at zero volts adjust Zo for a zero-volt DC output. With X equal to +10 volts DC adjust g...

  • ISP Programming cable

    2014-11-20 23:38:34112

    Sometimes when we need to program an avr microcontroller on ISP (In System Programming ) we need a “ data cable “ ( In system programmer cable ) to...

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