This circuit allows you to read resistors up to 20 M ohms, converting it into voltage. The circuit is from the 90s. The operational ones used admit modern equivalents.
This power control circuit was found in an article in the June 1995 Electronis Now magazine. The...
This circuit for vehicular use is from an 80's American publication. The circuit has a light...
This circuit can be used with 3 receivers and is intended for low frequencies (medium wave range). We...