Electronic scale (CB7906E)

Using components of the time, this 3 and half digit scale was found in an Electronics Now from the 90s. The circuit is powered by a 9 V battery.

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Audio Injector (CB22316E)
This small blocking oscillator for approximately 1000 Hz was found in an American documentation from the...
10 A NO Relay (CB6013E)
This isolated solid state relay can function as a shield directly controlling 10 A loads. The...
Voltage to Frequency Converter (CB13456E)
This circuit was found in a 1974 publication. It converts the applied voltage into pulses of...