I hooked up this:
http://www.radioshack.com/product/i...pg=2&sr=1&origkw=LED&kw=led&parentPage=search
To a 9V and used a 270 resister on a switch. I followed the diagram from this:
http://ledcalc.com/#calc
But my 9V is becoming extremely hot!! Do I need to upgrade to 4 AA?
Thanks!
http://www.radioshack.com/product/i...pg=2&sr=1&origkw=LED&kw=led&parentPage=search
To a 9V and used a 270 resister on a switch. I followed the diagram from this:
http://ledcalc.com/#calc
But my 9V is becoming extremely hot!! Do I need to upgrade to 4 AA?
Thanks!