Arduino on a breadboard and SD card reading
After a few evenings working on the PIC (slave) end of things, I decided to return to the Arduino (master) development. Having learned lots about PIC circuits and development I decided to learn some more about Arduino, I did this by building one on a breadboard.
The instructions for the converter showed that I had to solder a DTR connection onto the card to enable programming of AVR chips (auto-reset), so this was easily done.
I was able to test the basic serial connectivity, but failed to upload a program to the ATMEGA chip. After an email to the seller I realised that, despite normal convention, the connections for this stick are RX->RX and the TX->TX ? very strange. I saw several postings on forums slating people for even suggesting that this is the case on some cards ! Well I can confirm that if you encounter a stick labelled "BAITE" (www.betemcu.cn) you need to wire RX->RX and TX->TX otherwise you won't be programming anything ;)