Free Simple Circuit Diagram
Simple voltage probe circuit shown in the schematic diagram below very useful in testing, testing, or troubleshooting discrete or integrated circuits, especially logic circuitry. This voltage probe circuit gives two indication, “high” or “low”. Here is the schematic diagram of the circuit: When the “high” condition is probed, Q2 and Q1 transistor will be activated shorting R2 and LED1 to […]
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When battery voltage drops to a certain level set by 10k pot, this simple battery monitor circuit energizes a LED. For reading battery voltage in 1 V steps or even steps as small as 0.1 V, we can add any number of additional circuits.This circuit provides LED indication for easy use on modern cars, replacing the ammeter reading which is […]
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This temporary lamp circuit is very helpful in emergency situation or in any application where we don’t have much time to turn off the lamp. Just press the push button, do a little fast task, and then leave it. This circuit hold the LED light for about 10 seconds, which should be enough for most simple tasks. Here is the […]
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Using a the controlled-half-plus-fixed-half-wave phase control method, this circuit can regulate an 860 a watt lamp load from half to full power. This circuit control the light output of the lamp from 30% to 100% because Half power applied to an incandescent lamp gives 30% of full light output. Here is the schematic diagram of the circuit:
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