i found a driver board from a hospital bed. looks like it had a display/ remote, and control for angle etc of seat(so motors).
it has a the following: Intel 8051 - Microcontroller http://en.wikipedia.org/wiki/Intel_MCS-51
LM2940 - 1a vreg http://www.national.com/mpf/LM/LM2940.html#Overview
ADC0834BCN -Analog-> digital converter http://www.national.com/mpf/DC/ADC0834.html#Overview
LM324AN - Op amp http://www.national.com/mpf/LM/LM324.html#Overview
MC74HC244AN - Octal 3-STATE Buffer, what is this?!?! http://www.fairchildsemi.com/pf/MM/MM74HCT244.html
DS1232 - MicroMonitor Chip, prevents "out-of-control micro" and resets on power failure http://www.alliedelec.com/Images/Products/Datasheets/BM/DALLAS_SEMICONDUCTOR/671-0121.pdf
4N35 - optocoupler, separates a high an low voltage circuit? http://measure.feld.cvut.cz/groups/edu/osv/4N35.pdf
first of all, what is the "MC74HC244AN"? what can it be used for, motor/LED controller? and then, except for the first two items, what are some projects or circuits etc i could built with these ICs? Arduino or not related...