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.
This 1995 circuit uses interruption sensors or NC connected in series in any quantity. With the...
The integrated circuit used in this amplifier is not common today. The circuit is from a...
This circuit turns off a load after an interval of 8 to 80 seconds adjusted on the potentiometer. The...