Found in an old publication, this is a transmitter with a spark coil. The high frequency oscillations of the high voltage spark generate the signal thrown at the antenna.
This circuit was found in a 1967 US documentation. The circuit applies to modern general purpose...
This circuit was found in a Popular Electronics from the 90s. The circuit has temperature...
This voltage regulator circuit has 1 A of maximum current for a TIP32 and 500 mA for a BD136. The...