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.
Equivalent operational amplifiers can be used on this crystal-controlled oscillator. The circuit is...
We found this circuit in an American documentation from the 90's. The circuit makes use of general...
This circuit was obtained in a 1982 publication. There are many types of car alarms available to...