This circuit was obtained in a 1967 Electronics World. The components are still common today, the SCRs can be replaced by equivalents and the unijunction transistors the 2N2646.
This circuit was found in a 1977 Radio Shack documentation. Its purpose is to generate 1 Hz...
This circuit activates a relay that has a lamp as a load. The circuit is from a Radio Electronics from...
This circuit is from National Semiconductor documentation. The operational amplifier is of the...