This precision full-wave rectifier used in instrumentation was found in a technical documentation from the 1980s. Diodes are general-purpose types.
This simple transistorized radio for listening on a crystal phone was found in a Japanese...
This very high voltage generator (VHV) uses a 555 and a power transistor with a heat sink. The...
Found in a 1969 documentation, this circuit is reset by a push button. The activation time is 100...