Random neon lamps (CB7236E)

This circuit for 6 lamps was found in old American documentation. The supply is of high voltage and the current drawn is very low.

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Constant volume amplifier (CB7095E)
This circuit has an automatic dynamic gain control in a range of 6 dB to 40 dB. We found it in...
Tuned audio oscillator (CB22254E)
This circuit is from a publication from the 50's. Inductive components are critical, and...
20 mA Current Drain with the LM3900 (CB14221E)
The figure shows how to use the LM3900 to drain current from a load of up to 20 mA with the...