Hi, i'm new to all this, but i'm trying to learn something with Arduino! First i've started with my Parallax RFID reader and a RGB LED to indicate status of the reader and when a valid tag is read, etc... Now i want to combine this with an electric door strike (i've already bought). This are the specifications of the door strike: Voltage: 12VDC Current: 450mA (max) ; 200mA (min) FailSafe
i want to be able to controll it through arduino (currently Duemilanove, but i want to make this work with a Standalone arduino) let's say, i have a 12V 2A wall power supply (i dont know if it's regulated or not?! ), so first question, how do i know if it is regulated ? Second, i want to power the arduino and the door strike with that power supply, so i have to split that source to arduino and to strike, how do i do this? Third, i have a TIP120 transistor, how do i connect it to arduino/door strike ?
if possible, can anyone make a schematic ? Cause i'm beginning with electronics and cant understand very much