Negative Ion Generator (CB25366E)

We found this voltage multiplier circuit in a Radio Electronics magazine from December 1991. The high voltage transformer is an adapted flyback

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Instrumentation Amplifier (CB4939E)
This high input impedance circuit makes use of two operational ones that are still common. The...
Source for LASER (CB7843E)
This power supply for gas laser (HeNe) was found in a 90’s Popular Electronics. It generates from 1300...
Darlington Amplifier (CB6291E)
Found in an Electronics World of 1968 this circuit has a 40 to 12 000 Hz bandwidth providing a 1.9 Vpp...