Gain 10 Amplifier (CB25636E)

Using a general-purpose transistor this AC amplifier was found in the November 1993 issue of Electronics Now.

Capacitive Discharge Ignition (CB12639E)
The critical component of this circuit is the transformer. T1 and T2 can be BD135 and T3 / T4 can...
RS Bistable LM3900 (CB19127E)
The figure shows how to implement an R-S flip-flop or bistable reset-Set with an LM3900...
Car Timed Alarm f (CB16431E)
This circuit was found in a 1987 documentation but uses components quite common in the current...