Transistorized Bragraph (CB7009E)

This circuit was found in 80's Popular Electronics. The components used are common and the number of indication channels (LEDs) can be changed.

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Simulated by transistor SCR (CB4731E)
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14-Stage Divide-by 16,384 Counter with Oscillator - 4060 (CB184E)
This counter performs the same function as the 4020, but includes an internal oscillator. The...
tape player amplifier (CB7301E)
Found in a 1968 Electronics World, this circuit uses operational amplifiers from that time. |...