This is a very simple LED dimmer circuit which has 2 transistors, 1 resistor and 2 potentiometers. Typical segment displays LEDs consume around 25 mA for each segment and should be limited to this ...
Electronic enthusiasts may be interested in a new high voltage step-up converter offering from 5V to 900V maximum outputs, which are selectable using the provided jumpers or via 4 pin parallel ...
A few years ago, manufacturers specified their white, but dim, LEDs for a maximum forward-current rating of 20 mA. Today's white LEDs deliver more light and thus must operate at ever-higher bias ...
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