This circuit uses a 7-segment display to indicate the logic level of a test circuit. The power supply is made with 5 V that can come from the analyzed circuit itself.
The sensor component used in this project is not common today as it is an 80's design. The circuit...
This circuit detects sunlight at dawn by triggering an audio oscillator. The photo transistor can be of...
This small 3 transistor transmitter was found in an English publication from 1963. The coils must...