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A long time ago in city not far from here I was a kid in a shop called microbyte, looking for games for my amiga a500, I had just got the 1 meg upgrade that I had saved up for when the sales assistant put jesus on e's (https://youtu.be/x37gIahAtXQ) on the shop amiga and cranked the speakers up, after my jaw dropped in amazement, i asked what is was and where to get, the assistant replied "its p.d so buy 2 disks and I'll copy you it". As I rushed home I was more excited about the P.d demo discs that I had just gotten rather than the game which i had bought. As soon as i arrived home i put my amiga on put disk 1 of jesus on e's in my amiga, it was at this point i found out to play the demo you needed a secondary floppy drive (which I never had) so I started saving again, but for whatever reasons I never got the ext floppy drive fast forward a few decades i get my old amiga out of the loft, I dust it off, sort it out so its in running order. As soon as i discovered the disks I had to have an external floppy drive, I just wanted that demo to work on my amiga. After seeing how much external amiga drives cost on ebay (which is just as much as an amiga itself costs to buy practically), I thought about building my own and with a bit of help from the amiga guru book and my 11 year old daughter with some investigating on the internet, we (myself and my daughter) built a prototype drive interface which did not work! but the drive light lit up, the drive made the right noises just something was not quite right. After about 8 different revisions, we arrived at a working prototype (shown in pictures) and the attached gerbers are the designs that we come up with from that, we hope to eventually use these in our home made External Drive. I finally got to see the demo run on my amiga, which is still as impressive and amazing as it was in 199, but more importantly I had a great time working with my daughter.


(**** 23 pin male D connectors are getting rare and harder to get, you can recycle an old serial 25 Pin D plug by sawing/rotary tooling off the end 2 pins at the angle they form, trim off the knub left over and with a little sanding and tweaking you can make the plug fit your amiga and use as normal, same thing applies for a video cables with a old printer cable.)


Bill of materials used in this project

74hc74
1
1k resistor
1
10k resistor
1
BC548
1
34 Pin 2.54MM floppy drive header (optional you can recycle an old floppy cable by soldering the wires of the non twisted end direct to the board)
1
24 pin 2.54 MM inline header (optional to save on resources it is possible to solder 23 core wire direct to board forgoing the header etc)
1
4 pin berg connector for floppy power connector (optional you can either A. order above with 28 pins & cut 4 off the end to use. B. or you could solder a recycled power cable from an old PC PSU)
1
you will also need a stright through floppy ribbon
1
23 pin D male plug (please see descript_____ion)
1
Aug 20,2020
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