Hello friends
I have got a problem.I have designed a system using 8051 in which p0 port is pulled high via 4.7k resistor network.p0 port reads data from diffrenet chips and process the data.I have utilised 12-0-12 centre tapped transformer and produced 5V using 7805 metal pack.This circuit used approx. 500 ma dc cureent from 7805 and transformer can deliver current upto 1A but still it gets heated very soon and so does 7805, though i have utilised heat sink for it!!!!
To reduce power consumption, i reduced the frequency but problem continues.System is wroking but i want to avoid heating.If anyone has suggestion please let me know.