Hi, I would like to run the board at 3V3 instead 5V. For that I did the modification which are discussed in the following thread aurduino.boards.net/thread/121/rebuild-tc275-5v-3-3v. After the rebuild the voltage is at 3,3V and the LED on the board are on, when I measure the voltage at the pins I get instead of 5V 3,3V, so the modification of the voltage supply seems to work. But the board itself do not work the red led next to the reset pin is constantly on I do not get any connection to the board via usb with the arduino development environment, it throws the message that no board is connected The program which is flashed to the controller do not execute
Do I have to change some settings to get the connection? I do need quick response, otherwise I have to build an adapter board to convert the 5V level to 3.3V level on the pins
I've changed the OR resistors from R320 and R323 to R319 and R324 as it is pictured in the schematics. But the problem endures. The red light next to the reset button is still contineously on. What should i check next?
The communication with the board now is ok, but there is still the problem with the red LED. It seems like there is a permanent reset Signal. Our assumption is, that there is something wrong with the reset button, because of the cnanged voltage supply.
I have removed the u502 3-pin part next to the IOREF output pin. Now the board works without any failure. Can you give me any information what this u502 part is about, or if there are any constraint in the circuit without this part?
Hi, The PCB I have is marked S/N: 4269.03.0626 but the picture over the board layout, for the hitex Shieldbuddy PCB as I have found do not comply. Can you help me and present a picture over the board layout as will comply to the PCB with S/N: 4269.03. \Moss