This circuit was found in documentation from the 1980s. The circuit uses several components of the time, which are uncommon today. We must not supply it with a transformerless power supply.
This filter with a Q factor of 50 was found in the Linear Applications Handbook by National...
Figure bellow shows how a digital frequency divider or counter can be created using the flip-flops containing...
This very low resistance meter was found in the February 1995 issue of Electronics Now magazine. The...