Ion generator (CB7837E)

This negative ion generator was found in a 90s Popular Electronics. The autotransformer can be an automobile ignition coil.

| Clique na imagem para ampliar |

1 kHz Tuned Filter 741 (CB19118E)
The gain of this circuit at 1 kHz [and 40 dB falling rapidly when the frequency deviates from this...
a Humidity Sensor (CB25721E)
When the probes of this circuit meet water, the relay closes its contacts. The circuit is from a May...
Q Multiplier (CB10064E)
This circuit is suitable for use with 1400 kHz range FI receivers. Changes can be made to other IF...