Ok, first post ever on this forum. Please be nice.
I am using one of these cheap rf modules: http://www.ebay.com/itm/1pcs-RF-transmitter-and-receiver-kit-for-Arduino-project-433Mhz-/370687915310?pt=LH_DefaultDomain_0&hash=item564eb8b52e
i have everything working just fine and dandy on my uno. But I want to use the receiver with an atmega8 on a breadboard. I uploaded the sketch and it works fine. Then I tried unplugging it from the usb and using a 6v power supply (4 AA battery pack). Now it doesn't work. Then I tried 2 2032 coin cell batteries. Then it worked again! I assume it has something to do with the voltage or current, but frankly, i have a really bad grasp of all of that. The specs for the receiver say it uses 5v, but then why do the coin cells work? I tried different resistors between the battery and the VCC pin on the receiver, but no luck. (and yes, the AA batteries were fresh and working).