Triple 5 V Numitron power supply (CB8673E)

This 1969 Electronics World power supply has 5 V to power digital circuits and a 170 V output for Numitron indicator valves used at the time.

| Clique na imagem para ampliar |

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...