I am making a custom bare bones arduino to drive a bank of LEDs. I am having a problem programing using my serial header. Every time try to program, I press the reset button and press upload. The pin 13 led flashes three times and then resumes the previously installed sketch (blink).
My design includes: 4x inputs (a0-a3) 6x PWM output (all pwm pins) 1x Serial programming header 1x pin 13 output 1x 5v power in (external regulator) 1x ceramic resonator 1x reset button input (with pullup) 1x Atmega328
As I said, I cannot program it. I can remove the chip, and program it in another board though. I am trying th use the TTL-232R-3v3 cable to program it. Again, I know the computer and cable work because I can program in another board. I went through all of the solder joints and made them cleaner, but still, no change. I receive the same error everyone else does (that two-line one, sorry I can't copy and paste right now)
I will post pictures when I get home, but does anyone know of a hardware problem that could be causing this error?