We offer multiple ways to convert RS232. We have 3-5V TTL converter cables, RS232 to USB, Ethernet converters, and USB to TTL converters. TTL converters allow you to communicate directly with your micro-controller or other TTL device. The RS232 to Ethernet devices allow you to bring serial RS232 equipment onto an Ethernet LAN/WAN.
We have a bunch of power supplies laying around. This is a bag of 3 randomly selected 12VDC power supplies (wall warts). 110VAC input. About 6 inches of wire with no ends. If you need a power supply (wall wart), you can't beat this deal.