Voltage Level Detector (CB22135E)

We found this circuit in an English documentation from the 80's. Transistors are general-purpose types.

Locked light relay (CB21998E)
This circuit with the CA3130 has a feedback system that works as a lock. The circuit is from a...
Phaser (CB20304E)
This guitar effect circuit uses components that are still common in our market. We found the...
Negative Feedback Stage (CB6131E)
This circuit is from a 1967 US publication. The configuration can serve as a basis for designs...