We found this circuit in an old magazine. This is an assisted ignition, where the contact breaker is kept. The circuit uses transistors that are uncommon today. Equivalents can be tested.
This circuit suggested by Intersil, provides a Kelvin scale of 3 and a half digits in a 7106, with...
This circuit suggested by Motorola can be used as LED high frequency modulator. One possible...
This LED diode test is suggested by the Texas Instruments optoelectronics manual. The transformer current...