-
Optical electronic doorbell 1
2014-11-18 07:45:29142The 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 05:41:09200TV 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 03:48:26125TV IF amplifier with video detector and sound takeoff using dual-gate MOSFETs (courtesy Texas Instruments Incorporated)....
-
TELEPHONE_SILENCER
2014-11-18 03:08:59179If 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 02:40:22160Automatically 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 00:25:46100The 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 23:26:28165900 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 23:14:07120The 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 22:38:04166Used 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 22:06:10174In 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 18:15:46292This 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 17:49:06151The 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 15:18:00193Thyratron 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 15:17:23158Two 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 14:12:49130The 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 08:26:20183Holds 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 07:41:33246The 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 03:33:27177Measures 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 00:26:3179IC1, 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 00:03:29195As 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 23:23:13193Improves 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 22:05:55159Uses 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 22:01:1489Types 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 21:45:39113Linear 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 21:30:21142Uses 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 18:40:56203This 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 16:30:31204Rotary-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,...
- PORTABLE_TOY_SIREN
- Farnell Electronic Electrical Components (BC549C)
- Linear_TV_IF_amplifier_using_an_ECG_1080_chip
- Motor brake circuit diagram
- Circuitry Design for Electronic Lock, Sauna Lock, Cabinet Lo
- Four_quadrant_multiplication_with_the__in_bipolar_operation
- Commutator_network_using_N_channel_MOSFETs
- Chicken male and female discriminator 1
- Anti-toll-fraud sound and light annunciator circuit diagram
- SHB6605 Power-Drive Integrated Circuit Diagram
- Two-tone electronic doorbell 2
- General_purpose_amplifier_with_FET_AGO_circuit
- Operational Amplifier basics
- AFC_FOR_COLOR_TV_KLYSTRON
- Programmable_100_hour_timer_with_display
- TV_video_IF_amplifier_using_an_ECG1128_7_pin_module
- Simple_dc_power_control
- Cars Basic Heavy Duty Electrical System Circuit Diagram
- APERTURE_CORRECTING_CIRCUIT
- Strobeflash_slave_adapter
- Small phone deconcentrator circuit
- Percentage_computer_using_an_AD534_multiplier_divider_chip
- TEMPERATURE_COMPENSATED_MILLIVOLT_REFERENCE
- LOW_FREQUENCY_DIVIDER
- TWO_COLOR_TV
- Recordable electronic doorbell
- MEASURING_SCR_TURNOFF_TIME
- TV_video_signal_processor_circuit_1
- Color_TV_chroma_processor_using_an_ECG797_16_pin_QIP_with_AF
- Telephone Operating Power Flash Electrical Switch
- HEART_RATE_REGULATOR
- OSTEOGRAPH_DETECTS_BONE_DISEASE
- Wideband_difference_amplifier
- CHROMA_AMPLIFIER
- TELEPHONE_INTERCOM
- 10_V_SIREN_CHIP
- Mobile Phone Sensor-900mhz RF Indicator Circuit
- Basic Voltage Regulator Composed Of Zener Diode
- Noninverting_amplifier_for_gains_less_than_10
- Video_system_remote_multiplexer_box
- 1998 Mitsubishi FTO Electrical Wiring Diagram (STTH810FP)
- MOVIE_CAMERA_FRAME_RATE_CHECKER
- Passive filters design
- Microcomputer Telephone Cost-Saving Device Circuit Diagram
- PC electrically isolated RS422 interface using SN75176B or M
- ColorTV_horizontal_self_regulating_scan_circuitry_fora_19_in
- Ac_coupled_video_amplifier_with_single_supply
- PHOTOGRAPHIC_DRYER_CONTROL
- INDUCTIVE_TRANSI_STOR_SYNC_LOCK
- CAMERA_HIGHLIGHT_EQUALIZER
- Digital lock 3
- SYNC_SIGNAL_DISTRIBUTOR
- Capacitance Input Type Rectifier Circuit
- DUO_DIODE_HALF_WAVE_SWITCH_MODULA_TOR
- Motor_speed_control_with_tachometer_feedback
- AT Commands
- PLETHYSMOGRAPH
- PLUG_IN_REMOTE_TELEPHONE_RINGER
- AUTOMATIC_FINE_TUNING
- KERR_CELL_SHUTTER
- XC62AP Series Integrated Voltage Regulator Internal Diagram
- LOW_POWER_FM_TELEPHONE_BUG
- The Li-ion battery drive white light LED circuit composed of
- Color_TV_subcarrier_generator_uslng_an_ECG1105_16_pin_DIP
- Cumulative timer circuit diagram
- Digital lock 9
- REMOTE_RINGER
- Proportional derivative regulator D furnace circuit
- The white light LED driver circuit of high current
- Eggs automatic incubator circuit diagram 3
- Optical electronic doorbell 1
- 1956 Chrysler and Empire Electrical Wiring Diagram Schematic
- Tracking Device Mechanism Diagram Circuit
- SAMPLE_HOLD_DISCRIMINATOR
- Home-use fan IR remote control circuit
- TV_INTERFACE_FOR_TYPEWRITER
- TELEMONITOR_FOR_RECORDING_PHONE_CALLS
- Voltage Driving MOSFET Grid Electrode Principle Circuit
- PULSE_CROSS_DISPLAY_GENERATOR
- Vector_computation_circuit_for_VSUBC_SUBSUP2_SUP__=_VSUBA_SU
- EXPOSURE_TIMER
- Children anti-lost reminder circuit
- Telephone electronic lock circuit diagram
- Digital lock 8
- TUNNEL_DIODE_TEST_ATTACHMENT_FOR_CURVE_TRACER
- HYDROGEN_THYRATRON_INDUCTION_HEATER
- BALANCED_DIODE_COLOR_BURST_GATE
- Discrete Sliding Tone (Frequency Ramp) Doorbell circuit
- LOW_COST_LAMP_DIMMER
- SIMPLE_TRIANGLE_SQUARE
- 1_watt_noninverting_power_amplifier_using_an_MC1554_connecte
- Password electronic doorbell 1
- 8_digit_up_down_counter_using_two_cascaded_ICM7217_28_pin_DI
- LOGAMP_WITH_OFFSET_ADJUSTMENT
- PRINT_TIMER
- Analog_video_switch_and_amplifier_with_direct_coupled_output
- CCTV_10_MC_CARRIER_TRANSMITTER_TERMINAL
- LT1766 Application Circuit
- Video_pulse_amplifier
- Simplified Long-Distance Call Lock Circuit Diagram