Here is my problem: Using a homemade Arduino based on a MintDuino: http://makezine.com/projects/build-a-mintronics-mintduino/
The schematic and picture of the board are provided. I also built an Arduino based on this Instructable: http://www.instructables.com/id/YABBAS-Yet-Another-Bare-Bones-Arduino-on-Stripb/?ALLSTEPS
If I can get help with the first board that would be great.
Problem description: 1) Upload Arduino ISP sketch to UNO (as per Arduino site example: http://arduino.cc/en/Tutorial/ArduinoISP - using first diagram on page), 2) Connect Uno to target board. Target board is a Duemilanove with a 168 (smaller homemade board is targeted as an Arduino Pro or Mini, 168, 5 V, 16 MHz), 3) Burn bootloader to target board, 4) Upload Blink sketch with blink rate different than what bootloader has, 5) Upload Blink sketch with a newer blink rate - fails most of time. When it does succeed, the IDE says it failed but the blink rate changes.
Here is the error message when it fails completely: "avrdude: verification error, first mismatch at byte 0x0105 0xe6 != 0xef avrdude: verification error; content mismatch"
By the way, I did put in a chip in that larger board.
Later in the day: same setup as above but using an Arduino Duemilanove with an Atmega168 as the ISP. Error message in IDE after 2nd upload of Blink sketch: “avrdude: verification error, first mismatch at byte 0x0104 0x60 != 0x64 avrdude: verification error; content mismatch”