This circuit was found in a Popular Electronics of the 1980s. The microammeter may be the lowest current range of a multimeter. The antenna is telescopic.
This circuit was found in a 1977 documentation. It limits the voltage from a source using zener...
Lamp Control (CB25902E) This low-current control circuit has a lamp as a load, but can have other...
This interesting circuit found in a European publication from the 1990s eliminates the voice that...