This power supply has a resolution of 10 pA in the current range from -100 to +100 nA. The circuit is from a 90s Electronic Design operating with voltages from -4 to +3.5 V.
The integrated circuits used in this 1989 project are uncommon today, including the IF coil that...
This circuit was found in a 1968 documentation. It makes use of both NO and NC reed-switches and small...
This delay circuit for a sound system was found in the December 1990 Radio Electronics magazine as part...