Monday, 16 February 2009

Motivation for myself. Bit bashing a serial interface to a MC14499

I've had this bit of retro junk lying around for a while.

That broken PCB was once part of the display of an Amstrad SDR4000 (IIRC) analogue satellite receiver (Don't ask how I remember model numbers - I don't know either) and sports a Motorola MC14499 7–segment LED decoder/driver with a serial interface.

As such, I figured it would be a great bit of kit to interface with a simple PIC, using one of the built in timers for clock generation. The eventual aim being to make a logging thermometer or somesuch, using a DS1820 or similar digital temperature sensor.