This circuit uses a lamp driven by the Hertz loop and measures its brightness with ordinary photovoltaic cells. The circuit is from a Radio Electronics from February 1964.
This capacitive-coupled stage can be implemented with any general-purpose transistor. The circuit can...
This voltage follower or amplifier with unit gain uses an unusual operational amplifier nowadays. The...
November 2016 - The new wireless power modules for use in wearables from Semtech can now be...