Following the guidelines it should work fine. You might be able to get these adapters cheaper than the one I used. Next I saw this article about converting a camera adapter to work with an Arduino. If anyone has gotten one of these to work, please let me know how. But the other thing is I couldn’t get it to work with an Arduino. Anyway, I don’t have any kind of RS232 device to check it with but don’t see how it could ever work with a true RS232. It apparently had a PL2303 chip in it and I saw no level converters. Nevertheless, I’d already bought it so I took it apart. The Arduino requires TTL levels which are 0 and 5 Vdc. Since I had three weeks to wait for it, I thought about and realized that it probably wouldn’t work as true RS232 has plus and minus 3-15 Vdc signals. So I saw these (see picture) USB to RS232 Serial DB9 Adapter cables on ebay for less than $2 so I bought one. I own one and like it but they’re costly. One of the more common is the USB-BUB by Modern Devices: So these Arduinos require a USB to TTL converter. TTL stands for Transistor-transistor-logic which basically means 0-5Vdc logic. Some Arduino clones come with a USB converter but most do not. Theoretically, they could be programmed with an RS232 port but it is really hard to find a PC with RS232.
Theory: Most Arduino clones are programmed with a PC using a USB port. So many Arduino users have RBBBs(Really Bare Bones Board (Arduino)) or Anarduinos or Boarduinos that could use a USB interface to program and power them but don’t want to spend $15-20 for a USB BUB or FTDI cable. LOG: Made a correction/modification Step 3 and added a picture step 5.
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