This circuit, with printed circuit board, is from an article in Radio Electronics magazine from May 1971. The circuit uses the C106 which was already a common component at the time.
Found in documentation from the 1980s, this amplifier uses an integrated circuit from the time....
This circuit is from a Radio Electronics from November 1957. The circuit uses a relay depending on the...
It is a simple blinker that simulates the action of an alarm when installed on the dashboard of a...