26 Feb '15, 9pm

Building an Industrial Control Unit With an Industrial Control Unit

Building an Industrial Control Unit With an Industrial Control Unit

Back in the 70s, industrial control was done with either relays and ladder logic or new programmable logic controllers. These devices turned switches on and off, moved stuff around a factory, and kept the entire operation running smoothly. In the late 70s, Motorola came out with an Industrial Control Unit stuffed into a tiny chip. The chip – the MC14500 – fascinated [Nicola]. He finally got around to building an ICU out of this chip , and although this was the standard way of doing things 30 years ago, it’s still an interesting build. [Nicola]’s ICU is extremely simple, just eight relays, eight inputs, the MC14500, a clock, and some ROM. After wiring up the circuit, [Nicola] wrote a compiler, although this chip is so simple manually writing opcodes to a ROM wouldn’t be out of the question. To demonstrate his ICU, [Nicola] connected up an on/off switch, a start button, and ...

Full article: http://hackaday.com/2015/02/26/building-an-industrial-con...

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