Circuit Diagram

WIDE_RANGE_CURRENT_TO_FREQUENCY_CONVERTER

Published:2009/6/25 2:19:00 Author:May

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22_WATT_INCANDESCENT_LAMP_DRIVER

Published:2009/6/25 2:18:00 Author:May

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SHIFT_REGISTER

Published:2009/6/25 2:17:00 Author:Jessie

The shift pulse amplitude is less than 15 volts. If a stage is off，the shift pulse will not becoupled to the next stage，If it is on，the diode will conduct and trigger the next stage.Just prior to the shift pulse the anode supply is interrupted to turn off all stages.The stored capacitor charge determines which stages will be triggered，   (View)

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HIGH_IMPEDANCE_PRECISION_RECTIFIER_FOR_AC_DC_CONVERTER

Published:2009/6/25 2:18:00 Author:May

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SHIFT_REGISTER

Published:2009/6/25 2:17:00 Author:May

The shift pulse amplitude is less than 15 volts. If a stage is off，the shift pulse will not becoupled to the next stage，If it is on，the diode will conduct and trigger the next stage.Just prior to the shift pulse the anode supply is interrupted to turn off all stages.The stored capacitor charge determines which stages will be triggered，   (View)

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POWER_VOLTAGE_TO_CURRENT_CONVERTER

Published:2009/6/25 2:17:00 Author:May

Low cost converter is capable of supplying constant ac currents up to 1 A over variable loads.   (View)

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BUTLER_COMMON_BASE_OSCILLATOR_BASIC_CIRCUIT

Published:2009/6/25 2:17:00 Author:May

Circuit Notes This circuit operates at or near series resonance. It has fair to poor circuit design with parasitics, touch to tune, and fair frequency stability.   (View)

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CALCULATOR_TO_STOPWATCH_CONVERTER

Published:2009/6/25 2:17:00 Author:May

This circuit can be fitted to any calculator existing with an automatic constant to enable it to be used as a stop-watch. The 555 timer is set to run at a suitable frequency and connected to the existing calculator battery via the push-on push-off switch and the existing calculator on-off switch.   (View)

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BATTERY_LANTERN_CIRCUIT_

Published:2009/6/25 2:15:00 Author:May

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COLPITTS_HARMONIC_OSCILLATOR（BASIC_CIRCUIT）

Published:2009/6/25 2:14:00 Author:May

Circuit NotesThis circuit operates 30-200 ppm above series resonance. Physically simple, but analytically complex. It is inexpensive with fair frequency stability.   (View)

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POWER_VOLTAGE_TO_CURRENT_CONVERTER

Published:2009/6/25 2:17:00 Author:Jessie

Low cost converter is capable of supplying constant ac currents up to 1 A over variable loads.   (View)

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BUTLER_EMITTER_FOLLOWER_OSCILLATOR（100_MHz）

Published:2009/6/25 2:13:00 Author:May

Circuit NotesThis circuit has good performance without any parasitics because emitter follower amplifier has a gain of only one with built-in negative feedback to stabilize its gain.   (View)

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BUTLER_COMMON_BASE_OSCILLATOR_BASIC_CIRCUIT

Published:2009/6/25 2:17:00 Author:Jessie

Circuit Notes This circuit operates at or near series resonance. It has fair to poor circuit design with parasitics, touch to tune, and fair frequency stability.   (View)

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CURRENT_TO_VOLTAGE_CONVERTER

Published:2009/6/25 2:12:00 Author:May

Converter features eight decades of cur-rent range. The circuit is intended to be used with the 200.0 mV range of a DVM.   (View)

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COMPLEMENTARY_AC_POWER_SWITCHING

Published:2009/6/25 2:11:00 Author:May

An input signal of less than 1 mA and 1 V is required to switch on CS1. As long as this input signal is maintained, CS1 will conduct during each positive half cycle of anode voltage, thereby energizing load L1 with half-wave rectified dc. L2 remains de-energized, since the anode of CS1 will not go more positive than 1.5 volts, and voltage divider R2 - R3 cannot provide enough voltage to trigger CS2. Upon removal of the input signal, CS1 will drop out.L1 will be de-energized, except for a small amount of ac current through R2 and R3. CS2will be triggered on at the beginning of each positive half-cycle, when CS1 anode voltage reaches 2 to 3 volts. CS2 will conduct for nearly the entire positive half-cycle energizing L2. It should be noted that the 6.3 volt lamps used will operate at 1/3 the rated brilliance because of the controlled switch half-wave rectifying action and will extend the operating lamp life by several orders of magnitude. Should full brilliance be desired, the anode supply voltage level should be raised to 9 volts ac.   (View)

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CALCULATOR_TO_STOPWATCH_CONVERTER

Published:2009/6/25 2:17:00 Author:Jessie

This circuit can be fitted to any calculator existing with an automatic constant to enable it to be used as a stop-watch. The 555 timer is set to run at a suitable frequency and connected to the existing calculator battery via the push-on push-off switch and the existing calculator on-off switch.   (View)

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HI_LO_RESISTANCE_TO_VOLTAGE_CONVERTER

Published:2009/6/25 2:10:00 Author:May

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BUTLER_EMITTER_FOLLOWER_OSCILLATOR_BASIC_CIRCUIT

Published:2009/6/25 2:16:00 Author:Jessie

Circuit Notes This circuit operates at or near series resonance. It is a good circuit design with no parasitics. It is easy to tune with good fre-quency stability.   (View)

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LOW_COST，μP_INTERFACED，TEMPERATURE_TO_DIGITAL_CONVERTER

Published:2009/6/25 2:09:00 Author:May

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LIGHT_LEVEL_CONTROLLER

Published:2009/6/25 2:16:00 Author:Jessie

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