Anyway, my problem is that the Atmega from my Uno will not work in my PCB. What I've done:
Pin 9 and 10 are connected to a 16 MHz crystal.
Pin 7 and 20 are connected to 5V.
Pin 8 and 22 are connected to GND.
Pin 1 is connected to a button, if it's not pressed then it's connected to GND with 10kOhm resistor.
I powered my PCB with the 5V and GND from a Uno, maybe this isn't enough? I don't have the equipment at home to measure this. I do have it at college.
I did digitalWrite on pin 25,26 and 27. These are connected to LEDs and they work. They do output a signal to turn on a LED in the Uno, just not in my PCB. When I switch back the Atmega to my Uno it'll work perfectly. I'm just clueless on what's wrong with this.
kprims:
Pin 1 should have 5volts through a 10K resistor. Continuous Gnd keeps the chip in reset.
Damnit, well I guess I figured out my problem.
EDIT: This was the problem. I connected it to a breadboard to test it and it worked. I'll cut off a leg of the button and resolder it to GND instead of 5V and resolder the resistor to 5V. Luckily there are points within a few mm so I can simply solder a short wire.
You appear to have a diode on the output of the regulator into the Atmel processor ?
I can understand why there would be a diode on the input of the regulator, it stops the magic smoke escaping from the regulator when you reverse the battery connection.
Where is the fuse ?
The power tracks, ground and VCC could be a lot thicker.
Because of the way you have shown the PCB layout in the picture, no-one can see the ground connections, so they may be missing or not.
What is the battery and what is connected to the charge input ?
With the addition of a 5 pin header, a capacitor and a diode (there is pleanty of space) you would have the option of programming the Atmel processor in-situ over the normal serial bootloader.
