The whole system can be powered from any 12VDC power source, for instance from an automobile battery. /* * Arduino Camping Light * Camping Light with a single push button switch to control the light ...

Block Diagram The security system comprises of an Arduino Uno microcontroller and a standard SIM900A based GSM/GPRS modem. The whole system can be powered from any 12VDC/2A power supply ... a ...

[Ed] was tasked with adding push-button degaussing ... to use an SSR to switch the coil, and after making lots of transistor-based designs on paper, grabbed a nearby Arduino.