This is an improved circuit from the earlier version also found in the April 1972 Radio Electronics magazine. The power transistors must be provided with heat sinks.
We found this circuit in Japanese documentation from the 1960s. Transistors are types of the time...
This circuit was found in a 1998 documentation and its purpose is to automate controls by timing its...
This circuit is from a documentation from the 70s. The transistors are types of germanium of the...