If you have the skills and can get your hands on SMD components, you can assemble this small amplifier. We found it in the Radio Electronics Experimenter special edition from 1990.
The operational amplifier used in this configuration is of an uncommon type today. The circuit can be...
November 2016 - The new self-adhesive surface temperature sensors of the Amphenol JS series can...
This circuit was found in an old American magazine for radio amateurs. The circuit is based on a...