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  • Eggs automatic incubator 2

    2014-11-08 23:26:17144

    The eggs automatic incubator circuit is composed of the power supply circuit, temperature control circuit, temperature detection control circuit and eg...

  • PC electrically isolated RS422 interface CIRCUIT (SN75176B)

    2014-11-08 21:40:46231

    This article describes the PC electrically isolated RS422 interface CIRCUIT (SN75176B). The principle is very simple, very practical. The circuit compo...

  • MOSFET Arithmetic Product Wave Detector Circuit

    2014-11-08 20:46:59122

    The circuit shown in the picture a MOSFET with dual grid electrodes: the G1's normal signal input is used to receive the SSB signal from the IF amplifi...

  • TELEPHONE_INTERCOM

    2014-11-08 20:19:30150

    An intercom using dual-modular wall jacks is shown in this circuit. If the wires are available in the home telephone cable, this system can be installe...

  • TELEPRINTER_CONTROL

    2014-11-08 20:19:24119

    Coded pulse train controls teleprinter. When negative pulses are applied to grid of V2, line relays open in correspondence to pulse pattern.-R. L. Thom...

  • TRIGGER_SHAPING_FOR_RETINA_WELDER

    2014-11-08 19:59:26114

    Trigger pulse, selected by S2, is compared to fixed bias on one half of comparator tube V9. Trigger shaping by V10 provides strong, sharp pulse for gat...

  • 70_V_INPUT_5_V_700_mA_TELECOM_CONVERTER

    2014-11-08 18:57:47114

    Telecom dc-to-dc conversion applications are usually complex because of the wide input voltage range of -30 to -70 V. Either big, expensive converter m...

  • SIMPLE_LIE_DETECTOR

    2014-11-08 17:40:59190

    The circuit uses a two-transistor direct-coupled oscillator that has a frequency determined by C1, R2, and the (skin) resistance across the touch pads....

  • CROWBAR_IGNITRON

    2014-11-08 16:43:57119

    Multimegawatt high-vacuum modulator tubes for large radars are protected during tests by circuit that is triggered by fault sensors. Total response tim...

  • CONSTANT_CURRENT_DIODE_AS_COLLECTOR_LOAD

    2014-11-08 15:47:09153

    Gain is 45 with 4.7K resistive load, and increases to 750 with CCD as load.Gain-reducing effect of external load paralleling CCD can be eliminated by u...

  • X_RAY_TUBE_PULSER

    2014-11-08 15:36:40147

    Supplies 3,600 v peakto-peak pulses, swinging from 400 to 4,000 V. Input signal comes from square-wave generator having adjustable duty cycle of 10 to ...

  • PATHFINDER

    2014-11-08 15:18:10165

    This circuit is little more than a simple two-transistor oscillator (a relaxation type) whose frequency is controlled by a light-dependent resistor (LD...

  • The intelligent digital voltmeter circuit diagram composed o

    2014-11-08 14:52:3971

    The internal circuit adopts the successive incremental integration, digital zero and low noise BIMOS advanced technology. Under 51 / 2 mode, the maximu...

  • Digital lock 3

    2014-11-08 14:37:34131

    The digital lock circuit consists of the optical switch circuit, trigger, sound and alarm circuit and solenoid drive circuit, and it is shown in Figure...

  • Basic_triac_control_circuit_that_uses_an_SBS

    2014-11-08 13:51:46120

    This figure shows the basic control circuit for triacs that use SBS triggers. The line voltage and load current depend primarily on the triac character...

  • IC AM radio circuit

    2014-11-08 13:05:50132

    The receiver ( Figure a) input circuit is supplied by the 60Ω generator. Low -pass filter allows the entire frequency range with uniform sensitivity ....

  • Wideband_log_amplifier

    2014-11-08 12:55:58100

    This circuit consists of six log stages (two stages in each dual SL523) and two lift stages, which gives an overall dynamic range of greater than 80 dB...

  • CAPACITOR_BALANCED_SSB

    2014-11-08 12:46:26116

    Output varies linearly with input over signal range of 0 to 4.5 V. Undesired sideband is suppressed 26 db at balance.-A. C. Todd, R P. Schuck, and H. M...

  • Telephone on-hook warning circuit diagram

    2014-11-08 11:47:22108

    Telephone on-hook warning circuit diagram is shown in the above picture. The IC uses CMOS Shmidt hex inverter CD40106. C1 is better to use ceramic capa...

  • Keyer dimmer table lamp circuit

    2014-11-08 11:20:18174

    Keyer dimmer table lamp adopts two touch buttons to adjust the light. The light changes weaken from strong when peopletouch one of the buttons, and it ...

  • Electronics Attenuator electronic circuit

    2014-11-08 11:11:4480

    Two low voltage, low power zeners are used to control electronically the level of an audio signal. The attenuation range is from 6 to 58dB for an input...

  • TV_video_IF_amplifier_video_detector_and_signal_processor_ci

    2014-11-08 10:22:08120

    TV video IF amplifier, video detector, and signal processor circuits. Used in color and BW TVs (courtesy GTE Sylvania Incorporated)....

  • PERCUSSION_OR_ELECTRONIC_MUSIC

    2014-11-08 10:08:18152

    Provides congruent envelope shaping and coincident percussive envelope shaping of synthesized program material. One input accepts control signal, while...

  • Temperature/Voltage Monitoring System Circuit Composed Of MA

    2014-11-08 09:51:46123

    Ad shown in the picture, the circuit could measure two channels of temperature and one channel of battery voltage at the same time. It uses +5V power s...

  • TELEPHONE_VISUAL_RING_INDICATOR

    2014-11-08 09:48:27131

    This circuit will indicate the receipt of a call. When the telephone rings,a 100- to 120-V ring signal breaks over NE1, and causes SCR1 to trigge...

  • Electronically_programmed_timer_using_an_Intersil_8240_50_60

    2014-11-08 09:41:35135

    Electronically programmed timer using an Intersil 8240/50/60 16-pin DIP. This circuit uses a standard 54/74 series TTL 4-bit magnitude comparator to co...

  • TOUCH_TONE_ENCODER_1

    2014-11-08 09:15:29143

    Consists of SME Touch-Tone generator and keyboard made by Data Signal (Albany, GA) mounted on any small transistor radio. Only audio section is used, w...

  • Children anti-lost reminder circuit

    2014-11-08 08:57:22195

    Figure 1 shows the transmitter circuit. It consists of time-base IC NE555, R1, R2, C1. 1KHz low-frequency oscillator can modulate the high-frequency os...

  • LM2931 Basic Application Circuit

    2014-11-08 07:04:37147

    The voltage-adjustable LM2931 is a five-port voltage regulator. It adds the adjustment port (Adj) and on/off port. Its output voltage Uo is set by the ...

  • PIC12F675 controlled electrical key-lock

    2014-11-08 05:55:0685

    For building 12 button key-lock you dont need microcontroller with many ports. Ivica Novakovic has a nice demonstration on how low pin count microcontr...

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