mentholboy
- Feb 7, 2011
- 3
- Joined
- Feb 7, 2011
- Messages
- 3
I've built a perspex box with 5 red leds for the footwells in my car. I've wired them in parallel, the forward voltage is 1.9v and the forward current is 20ma and there running off of 2AA batteries. I put the numbers into a resistance calculator which told me to get a 12ohm resister. All wired up and turning on fine, but the batteries are getting hot and i can't work out why. Also occasionally when i flip the switch, the leds are veryyyy dim and gradually get brighter. What am i doing wrong?