This 100 second timer was found in the September 1992 issue of Radio Electronics magazine. The circuit has two timing ranges and time adjustment at R6.
This 80s signal follower makes use of an audio amplifier of the era. The circuit can be adapted to...
This circuit may be modulated by a very low frequency signal, for example to obtain the vibrato...
We find this circuit in an American manual from the 80's. The circuit can be implemented with more...