An article on modifying MSR-206 magnetic card reader to replace RS232 port with USB by crimier:
This was of high urgency, so I’ve had to suspend my usual work activities and concentrate on this project yesterday. MSR-206 is a pretty impressive piece of technology, incomparable to those cheap eBay magnetic card readers. It even includes 24V 2.2A DC power supply, which is quite heavy and makes you question those cheap USB 2.5W card readers – like, are they really OK for most applications when somebody released such a powerful thing just to accomplish the same task? It’s also kind of state-of-art inside… Well, maybe it’s just me being used to see a lot of disassembled Chinese stuff =)