-
Optical electronic doorbell 1
2014-11-18 07:45:29144The optical electronic doorbell circuit is composed of the power supply circuit and light and sound circuit, and it is shown in Figure 3-111. Power sup...
-
TV_video_IF_amplifier_and_detector_using_two_8_pin_DIPs
2014-11-18 05:41:09203TV video IF amplifier and detector using two 8-pin DIPs．Powergain is as fallows∶60 dB at 45 MHz(pin 3 open), 56 dB at 58 MHz(pin 3 open)，61 dB at...
-
TV_IF_amplifier_with_video_detector_and_sound_takeoff_using_
2014-11-18 03:48:26127TV IF amplifier with video detector and sound takeoff using dual-gate MOSFETs (courtesy Texas Instruments Incorporated)....
-
TELEPHONE_SILENCER
2014-11-18 03:08:59181If you are busy and cannot answer or do not wish to answer your phone, this circuit will give a busy signal without you having to leave the phone off t...
-
PRESET_PULSE_COUNTER
2014-11-18 02:40:22167Automatically controls lesion-producing ultrasonic radiation counting up to 99,999. Mechanical counter is actuated by thyratron V5, which is keyed by o...
-
Electrical pump controlled circuit
2014-11-18 00:25:46105The automatic pump controller eliminates the need for any manual switching of pumps installed for the purpose of pumping water from a reservoir to an o...
-
900_MHz_BF_amplifier_using_a_3N225_dual_gate_MOSFET
2014-11-17 23:26:28166900 MHz BF amplifier using a 3N225 dual-gate MOSFET. Coils L1 and L2 consist of the leads of the 1 pF and 3 pF capacitors (courtesy Texas Instruments I...
-
Electronic ERNIE Device Circuit
2014-11-17 23:14:07122The picture shows the electronic ERNIE device's specific circuit. The IC1 is CD4011 with two input ports and four NAND gates. And the NAND gate IC1-1, ...
-
CCTV_RECEIVING_TERMINAL
2014-11-17 22:38:04167Used with repeater (not shown) that makes up for loss in last section of cable. Amplifier then raises level about 10 db. Selective negative feedback im...
-
Direction_and_speed_control_for_series_wound_or_universal_mo
2014-11-17 22:06:10181In this circuit, Q1 through Q4 are triggered in diagonal pairs. The pair to be turned on is controlled by S1, which selects either T1 or T2 to receive ...
-
PC electrically isolated RS485 interface (MAX487)
2014-11-17 18:15:46299This article describes the PC electrically isolated RS485 interface (MAX487). The principle is very simple, very practical. The circuit components can ...
-
Boiler electronic descaling device circuit diagram 4
2014-11-17 17:49:06152The boiler electronic descaling device circuit is composed of the power supply circuit, 200kHz square wave oscillator, driver amplifier and the output ...
-
HYDROGEN_THYRATRON_INDUCTION_HEATER
2014-11-17 15:18:00208Thyratron acts as high-speed switch, much like spark-gap oscillator, to produce damped oscillations in tank circuit L2-C2.Output frequency is 10 to 14 ...
-
TEMPERATURE_COMPENSATED_MILLIVOLT_REFERENCE
2014-11-17 15:17:23165Two identical diodes are used to derive a temperature -compensated voltage across R2. Select two diodes of the same manufacture with, for example, 10-m...
-
The bridge type T circuit of reducing the components of Notc
2014-11-17 14:12:49132The double-T circuit with less number of components achieves the notch filter circuitry, as well known as the T-bridge circuit, its application is few ...
-
AUTOMATIC_BETA_CHECKER
2014-11-17 08:26:20187Holds collector current of test transistor Qx at preset value while base current is measured and bola de, termined.-E. P. Hojak, Automatic Measurement ...
-
DC motor commutator circuit
2014-11-17 07:41:33250The important component of DC motor, and its functionis to transform the DC current to AC current in the coil ofelectric brush or transform the AC elec...
-
CRYOGENIC_CONTACT_TESTER
2014-11-17 03:33:27184Measures critical current in superconducting contacts during periods shorter than 100 microsec in which such currents can be maintained, and gives osci...
-
SHB6605 Power-Drive Integrated Circuit Diagram
2014-11-17 02:52:5888As a power driver IC, SHB6605 is widely used in air conditioners controlled by microcomputers, such as Changhong, Chinese style series air conditioners...
-
SOUND_I_F_FOR_COLOR_TV
2014-11-17 01:33:14139Uses three transislor stages und Foster-Seeley discriminotor to give audio output of 1 v peak to peak. -D. Bray, Solid State Makes Debut in Big Screen ...
-
Dual-output electronic ballast circuit diagram
2014-11-17 00:26:3182IC1, TR1, TR2, L1 form the switching power supply with output in 80V. One part of IC1 forms the 65kHz square wave oscillator to drive N-channel MOSFET-...
-
E-anesthetic circuit diagram
2014-11-17 00:03:29198As shown is the electronic anesthesia circuit. The circuit can output 8 groups of electrode which output at the same time independently. Regulating any...
-
AUTOMATIC_CHROMA_CONTROL
2014-11-16 23:23:13196Improves stability of hue, saturation, noise, and pull in characteristics of received color tv signals. Low-frequency diode gate corrects subcarrier os...
-
FSK_GENERATOR_FOR_CASSETTE_DATA
2014-11-16 22:05:55164Uses two 565 PLL ICs, locked to 800-Hz system clock but oscillating at 6.4 kHz and 4.8 kHz, to provide FSK signals for recording digital data on ordina...
-
Types of resistor connection used in electronic circuits
2014-11-16 22:01:1490Types of resistor connection used in electronic circuits is one of the most important thing that must be known by anyone who works (repair design, buil...
-
Linear_TV_IF_amplifier_using_an_ECG_1080_chip
2014-11-16 21:45:39116Linear TV IF amplifier using an ECG 1080 chip, which provides 46 dB powergain. Transformer T is 0.32 mm enamel wire with a center-tapped primary of eig...
-
EXPOSURE_TIMER
2014-11-16 21:30:21145Uses thyratron to stop relay chatter. Gives long time delays with relatively small capacitance. Ordinary volume control covers complete timing range. C...
-
Full_range_ac_power_control
2014-11-16 18:40:56207This circuit shows a full-range ac control scheme that uses a triac and SBS. Control is obtained by varying the 100-k Ω pot. Notice thatRGK can be omi...
-
TV_AFT_AFC_circuit_for_three_types_of_systems_using_an_ECG10
2014-11-16 16:35:32131TV AFT/AFC circuit for three types of systems using an ECG1046 14-pin DIP. The ECG1046 contains two VIF differential amplifiers, a phase detector, and ...
-
FERRITE_CUP_TUNER
2014-11-16 16:30:31210Rotary-axial tuner consists of two pairs of ferrite cups with ground D-shaped center cores, ganged to produce linear frequency variation from 500 to 1,...
- Digitally_controlled_time_delay
- Audi A4 2001 Standard Equipment Electrical (TL061)
- PERCUSSION_OR_ELECTRONIC_MUSIC
- Digital lock 8
- High_speed_video_peak_detector
- CONSTANT_CURRENT_DIODE_AS_COLLECTOR_LOAD
- tda1521 produced 2.1 computer subwoofer speaker circuit diag
- LASER_TV
- The commutating pole circuit of DC motor
- Telephone electronic lock circuit diagram
- The clamping single-end normal shock converter circuit with
- 1_kHz_WlEN_BRIDGE
- X_RAY_TUBE_PULSER
- Capacitance Input Type Rectifier Circuit
- Color_TV_chroma_amplifier_demodulator_using_an_ECG791_16_pin
- Eggs hatching incubator circuit diagram 1
- TELEPHONE_VISUAL_RING_INDICATOR_1
- 9_channel_plus_fixed_priority_cha_nnel_logic_for_PF_scanner_
- Industrial electronic ignition circuit diagram
- l00_MC_NOISE_FIGURE_TEST_SET
- Ac_coupled_video_amplifier_with_high_input_impedance
- COLOR_SYNC_SEPARATOR
- KERR_CELL_SHUTTER
- FM Wireless Microphone Circuit Diagram
- SCR_control_circuit_with_dc_output_that_uses_an_SBS
- Phone Flasher circuit diagram
- Switching_time_tests
- Regulator Power Circuit With Output Of 6V/5A
- Automobile AM radio circuit
- PHONE_LIGHT
- High voltage speed optocoupler and application circuit diagr
- M1040 centerless grinding machine circuit
- MAGNETIC_TAPE_DATA_SAMPLER
- HYDROGEN_THYRATRON_INDUCTION_HEATER
- Vector_computation_circuit_for_n_variables_using_three_434_m
- Gain_of_2_drivers_for_back_terminated_coax_
- Flashing Musical Gyroscope Circuit
- NEON_LAMP_OSCILLATOR
- TUNNEL_DIODE_TEST_ATTACHMENT_FOR_CURVE_TRACER
- SINGLE_FRAME_TV_PHOTOGRAPHY_TIMER
- Two-way telephone password device circuit diagram
- Sickroom calling device circuit
- Two normal shock converter circuit principle diagram
- Video_power_and_channel_select_on_a_single_coax
- 40_MHz_frequency_and_period_counter
- Flashing electronic doorbell
- Temperature/Voltage Monitoring System Circuit Composed Of MA
- Three-Port Voltage Regulator Internal Equivalent Circuit
- Strobeflash_slave_adapter
- Ultrasonic Liquid Level Indicator Circuit Composed Of NE555
- HIGH_ISOLATION_TELEPHONE_RINGER
- Kirchhoff’s Laws
- CCTV_REPEATER_POWER_SUPPLY
- Y977A/B thunderbolt flash integrated module circuit
- Motor_speed_control_with_tachometer_feedback
- 105_MHz_gate_2_contralled_RF_amplifier_using_a_TIS152_dual_g
- Optical electronic doorbell 1
- Doorbell circuit
- Simple_log_IF_strip
- The audible Logic Probe/Indicator
- LT1766 Application Circuit
- AUTOMATIC_FINE_TUNING
- Two-tone electronic doorbell 2
- Eggs automatic incubator circuit diagram 1
- BALANCED_DIODE_COLOR_BURST_GATE
- Operational Amplifier basics
- Voltage_offset_null_circuit_using_an_ECG915_operational_ampl
- FERRITE_CUP_TUNER
- TV_AFT_AFC_circuit_for_three_types_of_systems_using_an_ECG10
- CCTV_10_MC_CARRIER_TRANSMITTER_TERMINAL
- Multiplexed_BCD_to_7_segment_decoder_driver_displays_for_a_2
- Video_coaxial_line_driver
- TV_AFT_system_using_an_EGG1096_14_pin_DIP_with_tab
- Production volume automatic counter circuit diagram 2
- FET_ADAPTER_FOR_CURVE_TRACER
- EXPOSURE_TIMER
- Low Power Consumption Band-Stop Filter Circuit
- Digital lock 6
- SOUND_I_F_FOR_COLOR_TV
- Low Noise Convertor Circuit Composed Of LT1777
- Eggs automatic incubator circuit diagram 2
- PRECOMPRESSION_SHAPER
- Automatic voice greeting circuit diagram
- ELECTROEXPLOSIVE_PULSER
- Flyback Type Converter Circuit Composed Of MAX5021
- TRIGGER_SHAPING_FOR_RETINA_WELDER
- Two-speed fan control circuit
- HOURS_OF_DELAY
- 358_MHz_injection_locked_oscillator_for_color_TVUsing_one_EC
- Wideband_difference_amplifier
- Small phone deconcentrator circuit
- LM2931 Basic Application Circuit
- LOW_FREQUENCY_DIVIDER
- Chicks hatched informing device 1
- Ac_coupled_video_amplifier_with_single_supply
- Linear_TV_IF_amplifier_using_an_ECG_1080_chip
- Multiplier_circuit_using_an_AD533
- CVSD_ENCODER_FOR_SECURE_RADIO
- TV_IF_amplifier_uslng_dual
- Bipolar Telephone Circuit Diagram