This sensitive passage alarm was found in the August 1971 Radio Electronics magazine. The light beam can be obtained from LEDs or a laser in a modern version.
Found in a Maxim documentation from the 90s, this circuit produces a voltage of 5 V from an input...
August 2017 - The PIC32MM microcontrollers of the Microchip 32-Bit Family can be obtained from...
This very low consumption circuit can be powered by a solar cell. The time indication is given by a...