Logic level converter (CB7250E)

Found in an Electronic Design of 1965, this circuit consists of NOR gates and can be used in astable and monostable multivibrators.

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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...