This circuit was found in the February 1985 issue of Radio Electronics magazine. It is based on an AY-3-1350 melody generator that was common at the time. It is suitable for analog lines only.
This version of a mixer with a transistor appears elsewhere in this section and on this website. The...
We found this timer circuit in an American documentation from the 1980s. The circuit uses the 6 V...
This strobe light circuit for car spot adjustment dates to 1987, when there were no electronic resources...