This circuit was taken from a Popular Electronics from the 90's. The power step can be changed to operate with the most powerful LEDs available today.
Found in Maxim's documentation from the 90's, this circuit uses a component from the time and has its...
This control of DC motors for currents up to about 200 mA was obtained in an American publication of...
Any TTL inverter can be used in this circuit. We found it in documentation from the 80s, but it...