TTL Counter (CB21360E)

This counter from 0 to 9999 was found in English documentation. The power source must be 5V with at least 1A.

Electronic voltmeter (CB23755E)
This circuit was found in Radio Electronics magazine from August 1966. The transistors are from...
Wattmeter (CB8978E)
We found this circuit in an old documentation for radio amateurs. The circuit uses an analog...
Positive Line Current Monitor (CB5245E)
This circuit is found in a 2005 Linear Technology application manual. The circuit monitors the High...