This circuit supplies currents from 100 mA to 2 A per R. The circuit is from a 90s American documentation. The components used are common today.
This configuration was found in the January 1992 Radio Electronics magazine. The frequency is set...
This circuit can use any comparator or even an operational amplifier. We can use the LM339 and the...
From a 90s Popular Electronics, this circuit emits pulsating signals for different types of...