its from a welder, as you can tell it has two 7 seg displays on it. my mom got it from work so i wanted to use it. i figured i could get it to display temps and maybe put it in my case somewhere. i was wondering how much voltage do you think this would take and where to apply the voltage. i can tell you anything you would like to know, such at the names of the microcontrollers and the colors of the bands on the resistors. http://www.atmel.com/dyn/products/p...=607&family_name=AVR+8-Bit+RISC+&part_id=2004 thats a link for the long microcontroller in the middle, 28 pins in all. the other ones are made from texas instruments, they say "65DVECKe4" on top then below that "SN74LS247n". there are 2 texas chips, each near the 7 seg displays. i can take more pictures if you wuold like, or answer questions you may have. also what would vr1 mean on a pcb? thanks.