This simple circuit needs a high gain stage to compensate for losses. It consists of a passive tone control obtained from Electronics Today International of the 90s.
This low-frequency relay oscillator was obtained from an article in Electronics Now magazine in...
This circuit is regulated by zener and provides a voltage of 9 V. The circuit is from a Radio...
We found this HV generator circuit in a 1967 publication. It can be fitted with SCR TIC106 and the...