Overvoltage Indicator (CB22007E)

Using a CA3130 operational amplifier, this circuit drives an LED when the voltage exceeds the value set in VR1.

10mm Optocoupler (CB14665E)
The recommended distance between the emitter and the phototransistor is 10 mm for this...
NE602 Frequency Converter (CB26008E)
The input and output frequencies of this circuit depend on the coils and capacitors of the tuned...
Inverter with the CA3140 and Reinforced Output (CB12308E)
This circuit was obtained in a 1991 publication. What it does is to amplify a signal with unit...