How to load a sketch to your femtoduino
You will need to use Windows, and hook your Arduino Uno to your Femtoduino using the hookup shown on the Arduino ISP page
*If you are using an Arduino Mega ADK board, see the note at the bottom of this page.
Before uploading the Arduino ISP sketch to your Arduino Uno board, you must change the code that reads “delay(40)” to “delay(25)” and then upload.
Once the modified Arduino ISP sketch is uploaded to your Arduino board, make sure to click “Tools” > “Programmer” > “Arduino as ISP”, then go to the “File” menu and click “Upload Using Programmer”. That should get your Arduino board to load your sketch to your Femtoduino. Congrats! You now have a sketch on your Femtoduino board.
* NOTE: If you have an Arduino Mega ADK board, you can connect Pin 50 (MISO) to D12, Pin 51 (MOSI) to D11, Pin 52 (SCK) to D13, and Pin 53 (SS) to RST. The delay value in the Arduino ISP sketch should still be set to “delay(25)”, but when uploading the sketch, you will need to select “Arduino Mega 2560 or Mega ADK” as your board. Once the sketch is loaded, you will need to set “Arduino Uno” as the board before clicking the “Burn Bootloader” option.