This circuit was obtained in a French documentation from 1981 and can be easily assembled. The analog instrument itself can be replaced by the current scale of an ordinary multimeter.
This circuit with the CA3130 has a feedback system that works as a lock. The circuit is from a...
This guitar effect circuit uses components that are still common in our market. We found the...
This circuit is from a 1967 US publication. The configuration can serve as a basis for designs...