Remote_control_for_lamp_or_appliance_using_a_filament_transformer

Published:2009/7/21 4:49:00 Author:Jessie

Remote control for lamp or appliance using a filament transformer. The circuit can handle up to 500 watts. R1 is adjusted for the highest resistance that will not trigger the triac with S1 open (courtesy General Electric Company).   (View)

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120_WATT_D_C_D_C_CONVERTER

Published:2009/7/21 5:53:00 Author:Jessie

Circuit boosts 28 V d-c input to 400 V d-c with 85% efficiency, drawing 5 amp and operating at 10 kc.-120-Watt D-C/D-C Converter Operates From -55° to +125℃, Electronics, 36:2, p 15.   (View)

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48_KV_OSCILLATOR_TYPE_CRT_SUPPLY

Published:2009/7/21 5:51:00 Author:Jessie

One of earliest circuits in which a-f sine-wave oscillator was used as power source. Filter capacitors are significantly smaller than in conventional line-transformer supplies.-NBS, Handbook Preferred Circuits Navy Aeronautical Electronic Equipment, Vol. 1, Electron Tube Circuits, 1963, p N14-2.   (View)

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Variable_speed_control_for_induction_motors

Published:2009/7/21 5:50:00 Author:Jessie

Variable speed control for induction motors (courtesy Motorola Semiconductor Pro-ducts Inc.).   (View)

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D_C_D_C_REGULATED_SUPPLY

Published:2009/7/21 5:50:00 Author:Jessie

Efficiency is 93% in converting 28 V d-c to 25 and 50 V d-c for telemetry transmitter. Regulation is achieved by storing energy in magnetic field of coil during half of each switching cycle created by transistors Q1 and Q2 after Q3 initiates switching cycle. SCR CR1 and diode CR5 control percentage of time switching transistors are on.-N. Downs and B. van Sutphin, Solid-State Transmitter Ready for UHF Telemetry, Electronics, 37:17, p 76-80.   (View)

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VARIABLE_REMOTE_POWER_SUPPLY

Published:2009/7/21 5:48:00 Author:Jessie

Permits varying output d-c voltage of scr power supply without changing a-c input voltage. Conduction time of scr's during each half-cycle determines average power delivered to load. Conduction time is controlled with pulse gating circuit that is synchronized with a-c line and is phase-variable. Provides maximum output of 60 amp at 20 V.-B. F. Gilbreath, Variable High Current Remote Power Supply, EEE, 10:12, p 27-28.   (View)

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High_low_AC_switch_for_light_dimming_or_small_motor_two_speed_control

Published:2009/7/21 5:46:00 Author:Jessie

High-low AC switch for light dimming or small motor two-speed control (courtesy General Electric Company).   (View)

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14_KV_AND_385_V_FOR_DARK_FACE_CRT

Published:2009/7/21 5:45:00 Author:Jessie

Uses two pentodes in parallel in a-f oscillator to provide sufficient power for final anode potential in oscillator-type supply.-NBS, Handbook Preferred Circuits Navy Aeronautical Electronic Equipment, Vol. 1, Electron Tube Circuits, 1963, p N14-3.   (View)

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Triac_full_wave_control_circuit_with_UJT_trigger_designed_for_a_900_watt_load

Published:2009/7/21 5:44:00 Author:Jessie

Triac full-wave control circuit with UJT trigger designed for a 900-watt load (courtesy Motorola Semiconductor Products Inc.).   (View)

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TRIGGERED_THYRATRON_PULSER

Published:2009/7/21 5:02:00 Author:Jessie

Coaxial rail gun generates high-velocity copper plasma when triggered by series-connected button guns energized through transformer by thyratron pulser. Vaporized copper from buttons shorts main 15-mfd capacitor, vaporizing inner copper high-voltage electrode. –M. F. Wolff,Plasma Engineering-Part 1: Generating and Heating Plasma, Electronics, 34:28, p 47-53.   (View)

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RMS_Closed_loop_voltage_compensator

Published:2009/7/21 5:01:00 Author:Jessie

RMS Closed-loop voltage compensator (regulator).This circuit provides an output of 90 ±2volts RMS at 600 watts for aninput of 105 to 260 volts (courtesy Motorola Semiconductor Products Inc.).   (View)

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Triac_relay_contact_protection_circuit

Published:2009/7/21 5:28:00 Author:Jessie

Triac relay-contact protection circuit (courtesy Motorola Semiconductor Products Inc.).   (View)

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Direction_and_speed_control_for_series_wound_motors

Published:2009/7/21 5:27:00 Author:Jessie

Direction and speed control for series-wound motors (courtesy Motorola Semiconductor Products Inc.).   (View)

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Touch_switch_for_loads_up_to_180_watts

Published:2009/7/21 5:25:00 Author:Jessie

Touch switch for loads up to 180 watts. This circuit is good for turning on and off lights, TVs, stereos, etc. Q1 is a phototransistor (courtesy General Electric Company).   (View)

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RMS_open_loop_voltage_compensator_regulator_for_application_requiring_large_conduction_angles

Published:2009/7/21 5:08:00 Author:Jessie

RMS open-loop voltage compensator (regulator) for application requiring large conduction angles. It provides an output 141 ±2 volts RMS at 500 watts for an input of 150 to 182 volts RMS (courtesy Motorola Semiconductor Products Inc.).   (View)

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Triac_temperature_sensitive_heater_control

Published:2009/7/21 5:06:00 Author:Jessie

Triac temperature-sensitive heater control. This circuit can be modified as shown to control a motor with a constant load. As shown the circuit is for heating applications but can be used for cooling by interchanging RT and R2 (courtesy Motorola Semiconductor Products Inc.).   (View)

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Time_dependent_light_dimmer

Published:2009/7/21 5:04:00 Author:Jessie

Time-dependent light dimmer. The circuit allows bright lights to slowly fade over a period of 15 to 20 minutes and permits loads up to 500 watts (courtesy General Electric Company).   (View)

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TRANSISTOR_TESTING_SUPPLY

Published:2009/7/21 5:01:00 Author:Jessie

Six taps on transformer, plus range switch that transfers negative bus to 24-V tap, provide choice of nine constant outputs from 3 to 36 V d-c.-F. W. Kear, Laboratory Supply for Transistors, Electronics, 35:30, p 55-57.   (View)

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OSCILLATOR_TYPE_SUPPLY_

Published:2009/7/21 4:57:00 Author:Jessie

Article gives basic design equations for d-c power supply using power transistors. Efficiency is up to 90%. D-c output voltage is 590 V for 3,500-ohm load. –T. Hamm, Jr., Equations for Designing Transistor Power Supplies, Electronics, 32:43, p 122-124.   (View)

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Remote_control_for_lamp_or_appliance_using_a_reed_switch_and_coil

Published:2009/7/21 4:57:00 Author:Jessie

Remote control for lamp or appliance using a reed switch and coil. The circuit will handle up to 500 watts (courtesy General Electric Company).   (View)

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