Hi,
I've been thinking about getting a Arduino Pro Mini 5V (328), but it does not come with a usb-connection. My computer has a 9-pin serial port. Can I use this to communicate with the Arduino board? And if I can, how?
The serial ports show up in the Arduino programming application as COM 3 and COM 4. Please help 
I use one of these to connect my RBBBs (which have a TTL-only interface like the Pro Mini). I consider it an excellent deal from a great supplier.
I've also read good reports about their USB version.
Be sure to check the pinout: I think the Pro Mini might have its serial pins in a different order from the RBBB. The layout of the P4 PCB allows for reconfiguration.
My computer has a 9-pin serial port. Can I use this to communicate with the Arduino board? And if I can, how?
Not directly, it is RS232 and 12V, the arduino requires TLL 5V
Mowcius
Not directly, it is RS232 and 12V, the arduino requires TLL 5V
Can i supply 5V from a USB port?
I also already have a Arduino Duemilanove. Can i use it to communicate with the Mini Pro?
Can i supply 5V from a USB port?
The signals are at 12V so you need level conversion.
I also already have a Arduino Duemilanove. Can i use it to communicate with the Mini Pro?
Yeah. If you remove the ATmega chip then you can connect the reset line, serial pins and power to the Mini pro.
Then it is just acting as a USB to serial converter with the FTDI chip.
Mowcius
Yeah. If you remove the ATmega chip then you can connect the reset line, serial pins and power to the Mini pro.
Then it is just acting as a USB to serial converter with the FTDI chip.
I'm pretty new to this, so can i get som exact instructions on how to connect the Pro Mini correctly?
The ATmega chip should pop right out nicely? Am I correct?