This circuit was obtained in a Hobbyst Handbook from 1990. The circuit can be easily assembled since the SCR can be a TIC106 and the transistor a 2N30555.
This circuit was found in a 1987 publication. A 4017 sequentially counts time in steps set by...
Found in 1967 General Electric documentation this circuit appears elsewhere in this section. SCRs are...
Found in an Electronic Design of 1964 this circuit has a control for the frequency and another for the...