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  • Humidity indicator circuit

    2014-11-05 19:28:1899

    For the purpose of raising early and better seeding, in the village, people always use plastic film to make up simple raise seed shed in the ground. Th...

  • CHROMA_AMPLIFIER

    2014-11-05 18:33:00118

    Used in transistorized color tv to provide response slope opposite that of i-f amplifier. Automatic color control signal reduces voltage gain of first ...

  • FET_ADAPTER_FOR_CURVE_TRACER

    2014-11-05 18:18:03130

    Used to convert input current steps from Tektronix 575 or other curve tracer lo output voltage steps for let gate.-R. Williams, Adapter for Curve Trace...

  • SAMPLE_AND_HOLD_WITH_OFFSET_ADJUSTMENT

    2014-11-05 17:44:15107

    The 2N4393 JFET was selected because of its low IGss (<100 pA), very low ID(off) (< 100 pA) and low pinchoff voltage. Leakages of this level put th...

  • 10_channel_with_thumbwheel_program_mable_priority_logic_for_

    2014-11-05 17:42:31119

    10-channel with thumbwheel-program mable-priority logic for scanner/monitor receiver (courtesy Motorola Semiconductor Products Inc.)....

  • Digital lock 5

    2014-11-05 13:06:51150

    The digital lock circuit is composed of the input control circuit, reset circuit, counter / divider circuit and control implementation circuit, and it ...

  • PULSE_DIALING_TELEPHONE

    2014-11-05 11:07:46146

    The TP5700 or TP5710 can reduce the number of components required to build a pulse-dialing telephone, as shown. The usual current source can be elimina...

  • DRINK_AID_FOR_THE_BLIND

    2014-11-05 07:31:57143

    The circuit is an audio oscillator based around IC1, a 555 astable that drives a piezo disk directly. Transistor TRI acts as a switch and will enable t...

  • Real-time Telephone Automatic Recording Device Circuit Diagr

    2014-11-05 06:28:32125

    Real-time telephone automatic recording device circuit is shown in the above picture. Despite automatic recording for the making calls and answering ca...

  • MULTIRATE_VIDEO_SYNC_STRIPPER

    2014-11-05 06:21:00137

    This dual-comparator, multirate video sync stripper provides separate horizontal and vertical pulses that are consistent with the composite video-input...

  • Optoisolator_driver_for_resistive_loads

    2014-11-05 05:49:3699

    These circuits show a visible red LED (MFOE76) that is used as fiberoptic drivers for both noninverting and inverting TTL inputs. Figure 9-34B shows ty...

  • BATTERYLESS_CARDIAC_PACEMAKER

    2014-11-05 05:15:08209

    Body fluids are electrolyte for implanted silver and zinc electrodes that provide d-c power for four-transistor pacemaker. Secondary of T1 provides fee...

  • CIRCUIT_MONITORS_BLINKING_PHONE_LIGHTS

    2014-11-05 04:09:14159

    A 2N5777 photo-Darlington cell picks up blinking light from the transparent plastic buttons. The power is switched ON and OFF by a hibeta 2N3904 transi...

  • Production volume automatic counter circuit diagram 1

    2014-11-05 02:55:11119

    Infrared transmitter circuit is composed of the capacitance feedback oscillator circuit, 40kHz pulse oscillator and driver circuit, and it is shown as ...

  • Simple_log_IF_strip

    2014-11-05 02:48:5592

    The SL523 shown In this figure is similar to the SL521 shown in Fig.3-2,except that the SL523 is a dual amplifier and provides an approximate 24~dB...

  • AC Current Controls Hour Meter

    2014-11-05 01:12:1479

    Many systems require routine maintenance based on machine operation time. The circuit below is a simple way to turn on a hour meter whenever AC power i...

  • OSTEOGRAPH_DETECTS_BONE_DISEASE

    2014-11-05 00:26:20126

    Electronic scanner using television fiying-spot microscope measures irregular micro-scopic tissue areas of spongy bone, for earlydiagnosis of bone dise...

  • Sound Control Toy Kitten Circuit

    2014-11-04 22:27:40127

    The sound control toy kitten circuit is shown in the picture. It is made up of two parts which are sound control switch and kitten mew generator. The m...

  • TWO_COLOR_TV

    2014-11-04 21:30:20167

    Picture is viewed on half-silvered mirror that combines images of red and green 14-inch picture tubes. Receiver circuits accept standard NTSC color. si...

  • 1.5V miniature wireless FM microphone circuit

    2014-11-04 16:14:3282

    The circuit shown in this paper uses 12 components to form a miniature wireless FM microphone with stable operating frequency, and its transmitting dis...

  • 125_47O_K_GIVES_125_470_Hz

    2014-11-04 15:30:07118

    Use of AD590 current-ratioed differential-pair IC temperature transducer gives low parts count for temperature-to-frequency converter. Sensor controls ...

  • Loop_through_video_cable_receiver

    2014-11-04 15:05:3768

    In this circuit, an LT1193 differential amplifier is placed across a distribution cable to extract the video signal. Common-mode signals are rejected b...

  • ECG FM demodulator circuit diagram

    2014-11-04 15:02:0074

    The circuit is suitable for satellite to transmit the ECG with bandwidth in 0.5 ~ 50Hz or other medical data in electronic systems. Audio signal is use...

  • TL431 Basic Application Circuit

    2014-11-04 14:08:24395

    The TL431 basic application circuit is shown in the picture.(a)Parallel voltage regulator circuit. (b)Series voltage regulator circuit. (c)Over-voltage...

  • TELEPHONE_AUTO_RECORD

    2014-11-04 13:58:29153

    The circuit requires neither a battery nor an ac supply to make it work. Set the recorder to the record position and when the telephone is taken off th...

  • CLASSIC_OP_AMP_ASTABLE_MULTIVIBRATOR

    2014-11-04 12:58:53120

    Uses CA3130 BiMOS op amp that operates at a frequency of 1 kHz. With rail-to-rail output swing, frequency is independent of supply voltage, device, and...

  • The RC phase-shift circuit with unchanged Output amplitude

    2014-11-04 12:51:16140

    The most commonly used phase shifter phase difference is 90 °. Shown in Figure 1, in the RC phase shift circuit, even the amplitude is allowed down to...

  • TV_video_IF_output_and_detector_with_AFT_and_sound_take_off_

    2014-11-04 11:20:10146

    TV video IF output and detector with AFT and sound take-off output. All coils and transformers are standard and can be purchased at a local electronic ...

  • BLOOD_PRESSURE_INDICATOR

    2014-11-04 10:13:41146

    Transducer bridge is energized at points A-A by external 3-kc oscillator. Unbalance voltage is amplified by V10 and demodulated by second bridge that o...

  • Flashing Musical Gyroscope Circuit

    2014-11-04 10:10:07174

    The picture shows the flashing musical gyroscopic circuit. It is made up of musical IC UM66T19L and multi-color LED LED1~LED4. When the gyro is in the ...

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