I attached the 8255 under the data buses in 8052. In addition, I want to control camera, infra-red sensors (one transmitter and one receiver), stepper motor under the interfaced 8255. Can I achieve it? Can anyone tell me which brand of camera can be "on and off", used supply voltage of 12V with composite signal out and can be controlled by 8255? Also, can anyone teach me how to drive a stepper motor as I bought it already without any manual, just have little specifications
(1) Supply voltage = 10.5V
(2) Six Wires
(3) Four phases
How can I step down the voltage of 12V to 10.5V in easy way?

Thank you very much!

Regards,
Decimal Point.