Radar detector (CB8628E)

Found in a 90s Electronics Engineering, this circuit makes use of components of the time. The critical component is the microwave sensor diode.

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555 Linear Ramp Generator (CB6357E)
This circuit appears elsewhere in this section and on this site. The circuit generates a linear...
LEDs in 110 V and 220 V (CB12804E)
The circuit shown has the advantage over the reductions with resistors to have a much higher...
Solid state relay (CB8518E)
This circuit was found in a 90s Popular Electronics. Both the coupler and the MOSFET can be of any...