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860_WATT_LIMITED_RANGE_LOW_COST_PRECISION_LIGHT_CONTROL

Published:2009/6/25 1:56:00 Author:Jessie

860_WATT_LIMITED_RANGE_LOW_COST_PRECISION_LIGHT_CONTROL
The system is designed to regulate an 860 a watt lamp load from half to full power. This is achie ved by the controlled-half-plus-fixed-half-wave phase control method. Half power applied to an incandescent lamp results in 30% of the full light output. Consequently the circuit is designed to control the light output of the lamp from 30% to 100% of maximum.   (View)

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COMPARATOR

Published:2009/6/25 1:56:00 Author:Jessie

COMPARATOR
An operational amplifier is used as a comparator which is capable of driving approximately 10 logic gates.   (View)

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COMPARATOR_WITH_HYSTERESIS

Published:2009/6/25 1:55:00 Author:Jessie

COMPARATOR_WITH_HYSTERESIS
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CRYSTAL_CONTROLLED_TRANSISTOR_OSCILLATOR_

Published:2009/6/25 1:54:00 Author:Jessie

CRYSTAL_CONTROLLED_TRANSISTOR_OSCILLATOR_
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PRECISION_DUAL_LIMIT_GO_NO_GO_TESTER

Published:2009/6/25 1:53:00 Author:May

PRECISION_DUAL_LIMIT_GO_NO_GO_TESTER
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LIMIT_COMPARATOR_1

Published:2009/6/25 1:51:00 Author:May

LIMIT_COMPARATOR_1
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HIGH_IMPEDANCE_COMPARATOR

Published:2009/6/25 1:54:00 Author:Jessie

HIGH_IMPEDANCE_COMPARATOR
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TEMPERATURE_COMPENSATED_CRYSTAL_OSCILLATOR

Published:2009/6/25 1:51:00 Author:May

TEMPERATURE_COMPENSATED_CRYSTAL_OSCILLATOR
Circuit NotesTwo different negative-coefficient capacitors change in capacitance to counteract or compensate are blended to produce the desired for the decrease in frequency of the normal AT-cut characteristics.   (View)

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FULL_WAVE_SCR_CONTROL

Published:2009/6/25 1:51:00 Author:May

FULL_WAVE_SCR_CONTROL
This circuit enables a single SCR to provide fullwave control of resistive loads. Resistor R3 should be chosen so that when potentiometer R2 is at its minimum setting, the current in the load is at the required minimum level. Diodes should have same current and voltage rating as the SCR.   (View)

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COLD_CATHODE_FLUORESCENT_LAMP_POWER_SUPPLY

Published:2009/6/25 1:54:00 Author:Jessie

COLD_CATHODE_FLUORESCENT_LAMP_POWER_SUPPLY
This circuit is a 92%-efficient power supply for cold-cathode fluorescent lamps (CCFLs), which are used to backlight LCD in portable equipment. The efficiency depends heavily on the component types, particularly C1, Q1, Q2, L1, and T1, whose manufacturers are noted.   (View)

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HIGH_VOLTAGE_SUPPLY

Published:2009/6/25 1:50:00 Author:May

HIGH_VOLTAGE_SUPPLY
This circuit uses a transistor oscillator and a voltage multiplier to charge C10 and C11 to a high voltage. When the spark gap breaks down, T2 produces a high-voltage pulse via the capacitance discharge of C10 and C11 into its primary. T2 is an auto ignition coil.   (View)

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800_W_TRIAC_LIGHT_DIMMER

Published:2009/6/25 1:50:00 Author:May

800_W_TRIAC_LIGHT_DIMMER
800_W_TRIAC_LIGHT_DIMMER

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COMPARATOR_CLOCK_CIRCUIT

Published:2009/6/25 1:50:00 Author:May

COMPARATOR_CLOCK_CIRCUIT
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PRECISION_DUAL_LIMIT_GO_NO_GO_TESTER

Published:2009/6/25 1:53:00 Author:Jessie

PRECISION_DUAL_LIMIT_GO_NO_GO_TESTER
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DOUBLE_ENDED_LIMIT_COMPARATOR

Published:2009/6/25 1:49:00 Author:May

DOUBLE_ENDED_LIMIT_COMPARATOR
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LIMIT_COMPARATOR

Published:2009/6/25 1:49:00 Author:May

LIMIT_COMPARATOR
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SINGLE_CHIP_dc_SUPPLY_FOR_120_TO_240_Vac_OPERATION

Published:2009/6/25 1:48:00 Author:May

SINGLE_CHIP_dc_SUPPLY_FOR_120_TO_240_Vac_OPERATION
Direct derivation of 5 to 24 Vdc from ac mains, without a transformer is possible with this cir-cuit. Note that a direct mains connection to the dc output exists. Suitctble safety precautions must be taken.   (View)

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HYSTERESIS_FREE_PHASE_CONTROL_CIRCUIT

Published:2009/6/25 1:48:00 Author:May

HYSTERESIS_FREE_PHASE_CONTROL_CIRCUIT
This circuit is intended for lamp dimming and similar applications. It requires only one RC phase lag network. To avoid the hysteresis (or snap-on ) effect, the capacitor is reset to approximately 0 volts at the end of every positive half cycle using the gate lead.   (View)

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LIMIT_COMPARATOR_1

Published:2009/6/25 1:51:00 Author:Jessie

LIMIT_COMPARATOR_1
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TEMPERATURE_COMPENSATED_CRYSTAL_OSCILLATOR

Published:2009/6/25 1:51:00 Author:Jessie

TEMPERATURE_COMPENSATED_CRYSTAL_OSCILLATOR
Circuit NotesTwo different negative-coefficient capacitors change in capacitance to counteract or compensate are blended to produce the desired for the decrease in frequency of the normal AT-cut characteristics.   (View)

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