Position: Index > Electrical Circuit >
  • Automatic kitchen ventilator circuit

    2014-11-19 11:52:20155

    The circuit isshown in the chart, when thecooking smoke smells heavy,the hood starts automatically to emitsound and light alarm signals ; until the smo...

  • On_off_touch_switch

    2014-11-19 10:47:15156

    This circuit uses a CA3240E to sense small currents flowing between contact points on a touch plate, which consists of a PC board metalization grid. Wh...

  • IGBT Grid Electrode Driving Circuit

    2014-11-19 10:10:41124

    The picture shows the IGBT grid electrode driving circuit practical example. This circuit should be noted the following tips:(1)PC should choose the op...

  • Simple Water Detector-Circuit

    2014-11-19 10:04:5285

    This simple water detector circuit uses alternative voltage in order to prevent the corrosion of the electrodes. It is easy to build and uses N1 as a t...

  • TELEPHONE_BUG

    2014-11-19 08:46:21182

    Q1 is an oscillator tuned to a quiet spot in the FM broadcast band. Dc from the line powers the bug. Diodes D1 through D4 ensure proper polarity. R1 ma...

  • FRENCH_COLOR_TV_CHROMINANCE

    2014-11-19 07:25:04177

    SECAM system uses time multiplexing of two chrominance signals, transmitted sequentially, with one-line memory in receiver circuit.-R. Chaste, P. Cassa...

  • THREE_OUTPUT_3_KC_OSCILLATOR

    2014-11-19 07:11:49122

    L-C oscillator provides carrier voltages of 4 V rms at 3 kc to blood-volume servo amplifier and to venous and arterial pressure indicator-Amplitude sta...

  • CONDUCTIVITY_METER

    2014-11-19 05:29:17146

    Circuit using single quad opamp measures relative change in con-centration of salt solution by monitoring its conductance. Use of alternating current t...

  • Pulse_amplifier_using_an_MC1545G_for_applications_in_radar_I

    2014-11-19 05:16:38102

    Pulse amplifier using an MC1545G for applications in radar IFs, pulse width modulation and pulse amplitude modulation systems (courtesy Motorola Semico...

  • MAX730 Series Integrated Voltage Regulator Internal Equivale

    2014-11-19 04:22:53103

    The MAX730 series integrated voltage regulator internal equivalent circuit is shown in the picture....

  • Low-power consumption AC flashing light circuit diagram

    2014-11-19 01:21:15165

    It uses the charging and discharging characteristic of capacitor C and the negative resistance characteristic of triode V under the breakdown condition...

  • ATV_LINE_SAMPLER

    2014-11-19 00:13:03138

    This device can be used to recover demodulated video from the output of an ATV transmitter. A small sample of the signal on the antenna feeder is tappe...

  • 45_MHz_sound_section_for_TV_using_one_ECG7O6_IC

    2014-11-18 23:47:10109

    4.5 MHz sound section for TV using one ECG706 IC.The chip contains a wide-band IF amplifier-limiter section,an FM detector stage,a zener regulated ...

  • 460_KC_F_M_RECEIVER_FOR_WIRELESS_MICRO_PHONE

    2014-11-18 21:29:37144

    Loop 5 meters square picks up in duction field of four-transmitter and feeds r-f amplifier V1. Operating frequency is converted to 50 kc by V2 and ampl...

  • LOW_COST_LAMP_DIMMER

    2014-11-18 20:26:17163

    Without a heatsink, Triac Q1 handles up to a 400-watt lamp. The neon lamp does not trip the gate until it conducts so the lamp turns on a medium brilli...

  • Ultralong_delay_timer_using_two_8240_16_pin_DIPs

    2014-11-18 18:23:07119

    Ultralong delay timer using two 8240 16-pin DIPs. The time base of unit 2 is disabled. The output is normally high when the system is reset. Upon appli...

  • Animal litter teller device 1

    2014-11-18 16:58:35128

    The animal litter teller circuit is composed of the detection control circuit and alarm signal transmission circuit, and it is shown in Figure 4-16. De...

  • CHROMA_CONIRQL_AND_COLOR_KILLER

    2014-11-18 15:19:3897

    Uses amplifier burst as reference to determine amount of bias on 6rst stage of chromo amplifier. If burst amplifier falls below certain level, color ki...

  • Digital lock 4

    2014-11-18 14:18:18137

    The digital lock circuit is composed of the timing trigger circuit, trick lock circuit, sound and alarm circuit and control implementation circuit, and...

  • Vector_computation_circuit_for_VSUBC_SUBSUP2_SUP__=_VSUBA_SU

    2014-11-18 13:58:4291

    Vector computation circuit for VC2 = VA2 + VB2 using the 434 multiplier/divider chip and two AD741 op amps (courtesy Analog Devices, Inc.)....

  • Automatic refrigerator protector

    2014-11-18 13:05:2984

    The automatic refrigerator protection line is simple with full function, reliable sensitive action, and it is useful accessory for refrigerator. When t...

  • TV_INTERFACE_FOR_TYPEWRITER

    2014-11-18 12:49:53125

    Video input circuitfor black and white transistor TV receiver permits feeding video output of TV typewriter to video driver in set, for producing chara...

  • irrigation motor automatic protector (1)

    2014-11-18 11:12:26126

    The principle of circuitThe irrigation motor automatic protector circuit is formed by the power supply circuit and the detection/protection control cir...

  • Multiple_line_driver_buffer

    2014-11-18 10:50:34138

    This circuit shows a 9911 used as a driver for multiple lines, which allows a video signal to be routed to 5 (or more) individual directions. A typical...

  • MOVIE_CAMERA_FRAME_RATE_CHECKER

    2014-11-18 10:46:38122

    Gives exact frame rate at each instant. Lens is removed for test. Light beam is projected into camera, and reflected back from pressure plate in film g...

  • Simple long-distance wireless FM microphone circuit

    2014-11-18 10:37:1174

    The the loop antenna L1 for emission also serves as the oscillation coil, the high-frequency current flowing in antenna is synchronized resonance with ...

  • PVDF heart sound pulse measurement principle circuit

    2014-11-18 10:35:5171

    Measuring circuit is composed of monostable oscillator ( 4538 ), the divider ( 4024), pulse generator ( ICM7555 ), counter ( 4040), latch ( 74HC513 ), ...

  • Optical electronic doorbell 2

    2014-11-18 09:39:01111

    The optical electronic doorbell circuit is composed of the power supply circuit, oscillator circuit, music generating circuit and color bulb control ci...

  • Eggs hatching incubator 4

    2014-11-18 09:27:5872

    The eggs hatch incubator circuit is composed of the power supply circuit, temperature control circuit and sound and light alarm circuit, and it is show...

  • CASSETTE_FILE_UPDATE

    2014-11-18 07:51:55107

    Interface circuit controls two tape decks for updating mailing lists or other sequential files stored on magnetic tape in audio cassettes. Two cassette...

Maybe you like