This circuit is from a Radio Electronics from February 1959. The circuit has a speaker output and good sensitivity. Power is supplied from a 9 V battery.
This circuit generates rectangular TTL modulated signals. The transistor can be the BC548 and...
This full wave configuration using SCR was found in a 1992 documentation. The SCR must be equipped...
This circuit consists of an amplifying probe for oscilloscopes and other instruments that can...