Suggested by a 1968 Motorola power semiconductor manual, this circuit uses a special transformer and transistors from the era. The frequency is 60 Hz.
A modulated (flashing) siren using the four gates of the 4001 integrated is shown in the figure....
May 2017 - Mouser Electronics already has Microchip's new MCP14A0451 and MCP14A0452 integrated...
Mouser Electronics has in stock Texas Instruments Buck controllers LM5145 to operate with voltage...