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.
We found this circuit in an American technical documentation from 1974. The circuit can generate...
This circuit was found in an American publication from the 1980s. In the original version it...
We find this circuit in an American 1980s documentation. The unijunction transistor may be the...