Hello. I just build a working project on an Arduino, built it on breadboard and I'm tyring to power the project for the first time using AC.
I have prebuilt 5V/1A switching power supply:http://dx.com/p/switching-power-supply-board-module-green-5v-1a-151582
There's a problem that the Atmega8 doesn't start with this power supply.
I tried the same breadboard circuit using Arduino 5V output, and [AC-DC 9V/1A adapter] > [L7805 regulator] solution, and both worked.
Why is not that 5V power supply able to boot the Atmega chip? It should have well enough power avalable(my project only draws about 20-50mA, depending how many LEDs are lit).
Powering on(about 10 seconds) draws about 30-31mA with all power supplies.
What can I do to correct the input so that Atmega would boot? Do I need to regulate or filter input somehow, although the power supply is included with filter caps and all that? Output voltage is good 4.98V.
I hope there's some way to get this 5V PSU to work, instead of getting 5V regulated 9V supply and waste power.
Update: I was able to get the same circuit working with that 5V PSU and Attiny2313.
I'd still like to know why is Atmega8 so nitpicky about the input, and how can I avoid the issue using that chip.