TTL to CMOS Converter (CB6097E)

This circuit, suggested by Signetics can be used as a shield. Modern operational can be employed as the circuit is from a 1980s documentation.

MAX17290 and MAX17292 Boost PWM Controllers
July 1017 - Maxim MAX17290 and MAX17292 PWM boost controllers can now be purchased from Mouser...
12 to 3 V x 1 A Reducer (CB4844E)
In the figure we show how to use common diodes to get a reference near 3 V in a car gearbox. The...
SIDAC surge tester (CB4246E)
This surge test circuit was found in a 1980s ON Semiconductor documentation. The circuit makes use...