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.
The integrated circuit of this 80's project is not common today. This is the HA2530 which must be...
We found this circuit in documentation from the 90s. It is a common configuration that is given in two...
We found this circuit for immobilizing a car's ignition system in the December 1976 Radio...