TTL Counter (CB21360E)

This counter from 0 to 9999 was found in English documentation. The power source must be 5V with at least 1A.

Divider with the 4046 IC (CB25003E)
The purpose of this PLL circuit that we found in the November 1986 Radio Electronics magazine is...
Ambiguity Circuit (CB21513E)
This circuit is intended for detecting 3 levels power grid voltage, and it can be adapted to...
LM380 Gain 200 Amplifier (CB14171E)
This circuit, which provides a power of up to 3.5 W, can be supplied with voltages from 9 to 14 V....