I have two problems with my two arduino mega 2560:
problem 1: one of the arduino mega 2560 works fine in terms of operation but, as it keeps on working for 4-5 min the controller ic(atmega 2560) starts heating up and becomes so hot that further operation may harm the ic.
problem 2: another arduino mega 2560 also works fine but here in 4-5 min duration the voltage regulator ic becomes so hot that further operation may damage it
Voltage regulators have limits!
hey i know they have limits the input voltage that i am giving on the vin pin is 14V....i think it can handle that much according to datasheet right
divatesagar:
hey i know they have limits the input voltage that i am giving on the vin pin is 14V....i think it can handle that much according to datasheet right
Sure, but "volts" is only one of the parameters. There's another one called "amps".
Volts together with amps gives "watts". Watts tells how much heat is produced. There's a maximum value for that on the datasheet, too.
(HInt: If the thing is overheating then you've exceeded it...)
Supplying 14V means the regulator has to chew up 9V, which turns into heat.
hey got the problem here......really thanks for comments it just clicked in my mind that the arduino was taking 14 volts in parallel with my other load in the circuit(i.e. motors and relay)....so as the current drawn was more it caused the heating problem. I am using a 7812 now to isolate the arduino supply from other loads.......its working fine.......no heating problem as such for last 20min