Author: joe.farr@gmail.com

  • Javelin – A home built computer – Part 3

    I’d assumed that when I retired, I would have loads of time on my hands. Ohhh how wrong I was. I seem to have a part-time job (unpaid unfortunately) helping a friend finish the refurbishment works on her studio. It’s fun though and we have a laugh, and as people seem to think it’s important,…

  • Javelin – A home built computer – Part 2

    So I’ve been working tirelessly, day and night (well, I’ve given it a few hours anyway) to move the project forward. Below is the latest version of my documentation. I’m having to document decisions and ideas because I just forget them, so my terrible memory is your good fortune. This isn’t the best way of…

  • Javelin – A home built computer – Part 1

    Yes, I’ve been here before… many, many times. I’m not sure how much time I’ve spent over the years designing and building computers. I’ve got, for example, a 6502 CPU based system modelled on the Acorn System 1. I’ve got several single board computers based on 6502’s Z80’s. 6809’s etc, multi-board computers, but the one…

  • Heat-Shrink cutters

    I landed a piece of assembly work consisting of soldering some thru-hole components onto some PCBs and create a bunch of simple wire harnesses. There is a join on the harness that needs a piece of heat-shrink to insulate it, and I was getting really tired of trying to cut hundreds of pieces all the…