This circuit is used in a LASER detection system to avoid echoes from short distances in systems up to 1 mile. The circuit is from a 1967 documentation.
This circuit was obtained in a June 1987 magazine Hands-On. It is a circuit that indicates on an...
Great sensitivity for the circuit can be obtained with a Darlington amplification step for the...
This is the traditional version of an astable multivibrator that makes two LEDs flash alternately at a...