This circuit has a frequency range of 30 Hz to 100 kHz with an output signal of 1 Vrms. We found it in 70s American documentation. The integrated circuits are CA3140.
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,...