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Small three step level indicator

2018-01-23 07:48  
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Today we look at the concept of a level indicator circuit which was built to be very small, can be displayed with LED 3 step. When see in the circuit is very simple. We use a variable resistor(Potentiometer) with 3 unit only, making this the circuit cheap and easy.

three step level indicator

The Resistor values of Potentiometer VR1-3 are determined by the type of LED, when we used MV 50 LEDs so resistant by steps of 2K for the 2V and drain current (series circuits) in all three LED lights on the 5mA. Chain can be extended. But the rapid increase in the drain current and the first LED in the current supply.

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