Simplest On-Off battery indicator using two LEDs
If you want to teach kids to learn simple LED circuit. This is one of good circuit. It is the Simplest On-Off battery indicator using two LEDs.
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November 25, 2008
Include: Volt meters :: Sound level meter :: Analog vu meter :: Soil moisture meter :: Digital meter circuit diagram :: Temperature measurements :: Electronic measurement tools :: Frequency meters :: Best battery tester :: Transistor tester project
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3 ideas of DC polarity tester circuit
This circuit you can check the point in the circuit that is a Positive voltage or a Negative voltage. Which this cheaper circuit, uses a little component is will appropriate…
September 14, 2008
Simple temperature sensor diode 1N4148
Here is temperature sensor diode 1N4148 silicon type and 741- op amp, so easy. The Output to voltmeter. You will learn why diode becomes temperature sensor.
April 28, 2007