Hi board,
as a demo / illustration for my DIY CPC 464 breadboard coupler / adapter, I would like to share a little CPC 464 hardware extension on a prototyping breadboard with you - a 7segment display for the CPC 464. It shows address decoding using 2 Atmel G16V8B PLD's, latching a nibble from the databus, IORQ* and RD* chip select, and features a CD4543BE 7segment driver for the 7segment display:
https://youtu.be/Lyb3IRQwyl4 (https://youtu.be/Lyb3IRQwyl4)
The idea behind the breadboard adapter was to facilitate CPC 464 hardware tinkering by making the expansion port more accessible - similar to these GPIO Breakout Board / Cobbler for the Raspberry PI. Why always use the Raspberry PI, if the CPC can also do it? Moreover, CPC is "instant on", no boot process :)
If you would like to purchase one of these expansion port breadboard adapter, please check my Ebay page.
http://www.ebay.com/usr/wesse5161.qolzl (http://www.ebay.com/usr/wesse5161.qolzl)
I believe it is mostly for educational & recreational purposes, but I also believe that it makes CPC 464 hardware prototyping much easier. I admit that address decoding makes it more difficult than using GPIO on the Raspberry PI, but it is definitely fun as well :)
Cheers,
Michael
Nice idea. Btw, you shouldn't put a single current limiting resistor on the common cathode. Use a seperate resistor for each segment on the anode, otherwise the LEDs brightness depends on how many segments are turned on.
Bryce.
Thanks Bryce!
That's a typical rookie mistake I suppose (besides not having enough resistors...) ;)
Just starting with hardware tinkering - will be fixed.
Cheers,
Michael
No probs. Always good to see new people getting involved in electronics.
Bryce.