I don't know what kind of wall-wart you are using, but they usually don't supply very much current. Andy W5VCJ > The voltage at pin 1 and 20 on the IOC (RF-U1) is 6.28V (which I presume is > reasonable) and 4.95V at pin 40 on the MCU (CTRL-U6). I am using 'wall-wart' > power supply for teting at this stage, which is regulated giving out 12.3V. > Inside the kit the voltage is 11.28V (shown on LCD).