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  • EEG_TELEMETER

    2014-11-11 04:39:35129

    Amplifier, modulator, and oscillator produce 37.7-Mc signals frequency-modulated by scalp voltages of epileptics. Radiated signal may be picked up by a...

  • MAGNETIC_TAPE_DATA_SAMPLER

    2014-11-11 04:31:04154

    Used in playback system for discrimination of f-m signal from magnetic tape. Compares data channel signals with recorded reference frequency, to make o...

  • Discrete Sliding Tone (Frequency Ramp) Doorbell circuit

    2014-11-11 04:28:3272

    This doorbell circuit produces a low tone that will slide up to higher frequency. The equivalent total resistance connected between the base of Q1 and ...

  • CHOPPER_AND_PHASE_DETECTOR

    2014-11-11 03:42:14151

    Input gate signal operates Schmitt trigger V1, to give identical but oppositely phased signals for phase detector of instrument for measuring phase dif...

  • TV_sound_channel_with_1_watt_output_using_an_ECG807

    2014-11-11 03:40:52160

    TV sound channel with 1-watt output using an ECG807. The circuit features DC volume control with 70 dB attenuation typical, limiter gain of 70 dB, limi...

  • Electrono_tuner_contror_memory_for_radio_and_TV

    2014-11-11 03:36:55152

    Electrono tuner contror/memory for radio and TV. The SH1549 gives capability of storing and recalling up to 16stations in addition to conventional vara...

  • Shanghai Sharp R-750B Computer-Type Barbecue Microwave Oven

    2014-11-11 03:17:36114

    The picture shows the Shanghai Sharp R-750B computer-type barbecue microwave oven circuit.'In the picture the XP is voltage plug. The FU1 is fuse. The ...

  • Eggs hatching incubator circuit diagram 3

    2014-11-11 03:01:25183

    The eggs hatch incubator circuit is composed of the power supply circuit and temperature control circuit, and it is shown as the chart. Step-down power...

  • Valuables pilfering tracker circuit diagram 1 (KD400/JD400)

    2014-11-11 01:19:38131

    The circuit is shown as figure. It contains wireless Voice FM transmitter and wireless receiver, decoder.The transmitter is placed in the shellof preci...

  • Eggs automatic incubator 1

    2014-11-11 01:15:57152

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

  • Ding-dong electronic doorbell

    2014-11-11 00:36:52180

    The ding-dong electronic doorbell circuit is composed of the power supply circuit, trigger control circuit, audio oscillator output circuit, and it is ...

  • TV_SOUND_SLOPE_DETECTOR

    2014-11-10 23:48:35120

    Uses drift transistor as efficient, highly sensitive oscillating linear-slope detector, injection-locked by one stage sound driver. A-m rejection is un...

  • Telephone electronic lock circuit diagram

    2014-11-10 22:24:54134

    Telephone electronic lock uses the key (there is a resistance plug)inserts into the circuit and makes the periodic circuit start to oscillation. And th...

  • B_Y_DEMODULATOR

    2014-11-10 22:16:4398

    Used in transistorized color tv. R-Y demodulators are identical except for having different demodulation phase angle. –D. Bray, Solid State Makes Deb...

  • VARIABLE_PLATE_RESISTANCE_MODULATOR

    2014-11-10 21:30:10107

    Increasing magnitude of carrier voltage in-creases modulated output. Used in amplification of d-c signals for automatic control systems.-L. S. Klivans,...

  • CVSD_ENCODER_FOR_SECURE_RADIO

    2014-11-10 20:27:5195

    Motorola MC3417 continuously variable slope delta modulator-demodulator IC is used as 16-kHz simplex voice coder-decoder for systems requiring digital ...

  • DIGITAL_CASSETTE_HEAD_DRIVE

    2014-11-10 20:14:51121

    Provides saturation recording as required for digital data. Back-to-back zeners provide bipolar limiting at ±10V, TTL-level inputs are applied to writ...

  • Inductive electronic doorbell 3

    2014-11-10 17:59:36149

    The inductive electronic doorbell circuit is composed of the trigger control circuit and audio output circuit, and it is shown in Figure 3-117. Trigger...

  • Gain_of_2_drivers_for_back_terminated_coax_

    2014-11-10 14:07:59115

    This circuit remains stable while driving unlimited capacitive video loads. As a result, flash A/D converter inputs, long-distance coaxial cables, and ...

  • tda1521 produced 2.1 computer subwoofer speaker circuit diag

    2014-11-10 13:24:30181

    This circuit uses a tda1521 as a two-channel power amplifier, and another tda1521 btl output is used as subwoofer amplifier. ic1 and ic2 may use the ne...

  • High_wattage_lamp_control

    2014-11-10 09:25:53137

    Many high-wattage incandescent lamps suffer shortened lifetimes when switched on at ac line voltages other than zero. This is because a large inrush of...

  • TEMPERATURE_ADAPTER_FOR_DVM

    2014-11-10 08:15:05142

    A schematic for the temperature adapter is shown. The circuit outputs 0.01 V/°F. To determine temperature, you ignore the decimal point in the display...

  • LOW_RFI_AC_LIMITER

    2014-11-10 08:14:21122

    This current limiter will work with any ac device. It does not need a zero-crossing network be-cause it is not based on a triac. Instead, a current-lim...

  • REMOTE_TELEPHONE_BELL_RINGER

    2014-11-10 08:07:42167

    The telephone-line extension bell ringer shown will enable you to add a remote ringer in your garage or some other area where a ringing telephone canno...

  • 45_MHz_TV_sound_channel_with_audio_output_stages

    2014-11-10 08:03:58126

    4.5 MHz TV sound channel with audio output stages. The ECG1047 has a three-stage differential amplifier for the IF amplifier section, a ratio detector ...

  • Temperature And Humidity, Liquid Level Multipurpose Automati

    2014-11-10 07:26:58127

    The picture shows the temperature and humidity, liquid level multipurpose automatic controller. This circuit is made up of buck rectifier filter power ...

  • PLETHYSMOGRAPH

    2014-11-10 07:11:05128

    Transistorized unit measures change in impedance of living tissue resulting from nonrythmic fluctuations of blood content Changes of 0.1% in total ti...

  • Fluorescent lamp electronic ballast

    2014-11-10 07:06:35164

    The fluorescent lamp electronic ballast circuit is composed of the rectifier filter circuit, high-frequency oscillator circuit and output circuit, and ...

  • TRIODE_CLAMP_MODULATOR

    2014-11-10 04:35:20112

    Dual-triode performs chopper function. With 6.3 v rms carrier, output is linear to 2 v rms for d-c inputs up to 25 v. Null level is 100 my, but can be ...

  • The simplest Electronic Door Lock

    2014-11-10 03:53:0179

    To put the relay in tension the 4 buttons S1 S4 must be pressed. If anyone of the 4 butoons S5 S8 are pushed the relay donts tension ( dont receives su...

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