Pulse generator with delay 555 (CB8922E)

We found this circuit in a Hands On Electronics from the 90s. The delay is given by the formulas next to the diagram.

Bistable with MOSFET (CB6813E)
The circuit shown was obtained in American documentation from 1968. MOSFETs can be replaced by...
Precision Current Monitor (CB3995E)
This circuit is from the 1990 Motorola Linear Databook. The integrated circuit used is the LF355,...
Ion generator (CB7837E)
This negative ion generator was found in a 90s Popular Electronics. The autotransformer can be an...