Found in a publication from the 60's, this circuit uses the CK722, germanium transistor of the time. The sensor is a photoelectric cell of the time.
Photoelectric alarm (CB22336E)
- Details
- Written by: Newton C. Braga
Found in a publication from the 60's, this circuit uses the CK722, germanium transistor of the time. The sensor is a photoelectric cell of the time.
