Ye Ol Spectrum Part Two..
Ye Olde Spectrum
Unravelling the RS-232 standard.
The new specification defines a symmetrical hardware handshaking method by just changing RTS.
Fan Control Circuit (LM317)
This is an illustrated tutorial on building a variable voltage control for fans and other units, ba
Stupid Simple Temperature Controlled PC box fan driver.
Hello and welcome. Feel free to skip any sections you don't want to read. To make this circuit work
Computer Voltage Monitor
This is an illustrated tutorial on building a voltage monitor for fan control circuits - rheostats,
RS232 keypad with autorepeat and 2 key rollover.
This project uses a 12F508 (or 12F509) to read a keypad and send the results over RS232. It is most