Transistor voltmeter (CB20582E)

This is a voltmeter with high input resistance. The transistor is germanium. We found it in an English publication from the 60s.

ADP244x Switching Regulators
May 2017 - Mouser Electronics already has in stock with the new ADP244x switched regulators from...
Touch Flasher (CB4996E)
This circuit, which can also be used with flashing LEDs as long as they have in parallel a charge...
Picoammeter (CB5134E)
This circuit for very low current measurements was found in an American 80's documentation. The used...