I've had great success with this forum and I need your help once again please...!!!
I am trying to create a project that uses an Arduino, a motion sensor (PIR) and a pressure sensor (FSR) which all need DC current at 5V.
I need the motion sensor to kick on 2 - 7 tiny lights (12v AC 65mA each), and the pressure sensor to kick on two small computer fans (12v DC .5mA each) and a small heating pad (12v AC 800mA).
I currectly have the lights and fans switched on/off via a relay for each and it works great...The lights and fans currently work on DC but I've been told that the heating pad will only correctly work with AC current and wanted to get some advise before i began adding it to the project.
I need to only use one main power supply because I can't have more than one plug to plug in.
SO... what should i do and how do i do it...??? Should i use an adapter (wall wart) to bring in power to my project and then somehow output some AC current to power the heating pad or should i bring in AC currect and somehow convert it to DC to power the arduino and sensors...???
Looking forward to some replies and thanks for the help...!!!