- Published in issue 9/2019 on page 99
Motorola MC14500 Industrial Control Unit
Peculiar Parts, the series
The relay logic used to control industrial machinery was eventually replaced with discrete digital logic but it was still difficult to modify and maintain. A programmable solution was needed but late 1970’s computers were expensive and complex so Motorola introduced the MC14500 industrial control unit. It has an interesting 1-bit architecture that is worthy of being a Peculiar Part.