I purchased a Rainbowduino recently in order to control several pieces of RGB LEDs . I connected 8 LEDs, which were verified in work order, to the rainbowduino. I believe the connection is right–the common anode to VCC and RGB to RGB, respectively. According to the description of the manual, an 8x8 LED matrix shoud be plugged and shine. I don’t have a LED matrix. But I expected these 8 LEDs should be turned on, at least some of them. Unfortunately, after I loaded a 9V power, nothing happened except the power light was up. In additin, I also tried to upload a sample sketch to test it. But I don’t have an UartSB either. So I used a normal arduino, connecting RX to RX, TX to TX, DTR to RTS, and also VCC and GND. The result is the same, all LEDs kept silent. Now I am totally confused. The power light of the rainbowduino is OK. It also blinked when I was uploading the sample sketch from an arduino. But no any RGB LED was lighted up. The most weird thing is that if I connected the VCC of the rainbowduino to 5V, arduino IDE reported information below while connecting to 3.3V was uploaded successfully.
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51
I can confirm the connection is no problem because both the reset led and power led in the rainbow blinked when uploading. I also set a blank sketch to the main arduino in advance . Anyway, I have tried everything I can find but not even one led was on. Anyone know what’s wrong with my rainbowdino? Thanks a lot!