Ion generator (CB7837E)

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

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Circuit with On-Off Sensor (CB11563E)
In the figure we have the way to use an on-off sensor to control a load up to 100 mA. The circuit has...
1kHz Low Pass Filter (CB11553E)
This filter is suggested by the Texas Instruments Linear Circuits Applications, 1986 edition. The...
Sinusoidal VCO (CB8747E)
Found in a 90’s Popular Electronics, this circuit generates sinusoidal signals with frequency...