Category Archives: Vintage Microcontrollers

An easy to build MCS-48 programmer, and something to use it for

Recently I’ve been working on a new shield for my HVEPROM project to program internal ROM UV erasable versions of Intel’s first microcontroller, released in 1976. I built it because I was trying to repair something with one of these in it, and being able to disassemble and modify the code was a key part of that repair. My universal programmer (quite an expensive one) didn’t support these. Others do, but I wasn’t keen to go splashing out again.

Read more about it here.

Why stop there? Having gone to all that trouble, I thought it’d be interesting to build an entirely new project based on one of these, and see what they’re all about.

Pictured above is the result of that effort. An MCS-48 based dual temperature sensor. It uses one or more DS18B20 one-wire bus temperature sensors.

Read more about it here.