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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Ramp and Hold Circuit (CB14217E)
The circuit whose characteristics are given in the graph uses two transconductance operational amplifiers...
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This circuit was found in the Radio Electronics magazine in an article about emitter-coupled...
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This circuit was obtained from an 80s factory manual. The integrated circuits used are uncommon...