Found in an EDN from the 90s, this circuit makes use of integrated circuits of the time, some of which are uncommon today. The output is given by:
Where:
Powered by just 1.5 V this 80's amplifier uses an integrated circuit of the era. The circuit is...
For a maximum current of 50 mA the capacitor must be from 470 nF to 250 V if the grid is 110 V and...
This simple two transistor timer can be used to measure short time intervals. The power supply...