This circuit was found in a 1965 Electronic Design. Transistor Q2 must be load dependent. The circuit can be adjusted for currents from 1 to 10 A. The voltage drop is 3 V and the maximum voltage is 35 V.
Counting up to numbers lower than 10 [between two and nine] can be done by connecting the n+1...
This circuit was found in a 1967 General Electric manual. It shows a SCR control with unijunction...
August 2017 - This Maxim component, available from Mouser Electronics, is ideal for wearables,...