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> One that seems to match what you are talking about is this one: [..] - $138 for the fully assembled version. I think [0] is closer to what I had in mind, tho

> One that seems to match what you are talking about is this one: [..] - $138 for the fully assembled version. I think [0] is closer to what I had in mind, though with SMD components to keep assembly cost low. > So I'm not sure where you get your $3.60 from... Here are some very rough calculations: PCB + PCB assembly + S&H to CA is $1117 for 1,000 units [1]. Perhaps a bit more for a 233mmx144mm board. This includes UV printing. Component cost for Q1,000 is $2784 [2]. This covers the major components for an RP2040 system. Can you imagine making something like this and selling it for $25? Every Speccy lover in the UK would get one just for kicks. You'd have your creation in the hands of 1000+ people and you'd probably make more overall that you'll make from the 70 units you're about to sell. > If you are interested in hardware manufacturing then I really would recommend giving it go. It's very educational. Oh definitely, I can see why you feel that way. It was quite exciting the first few times that I did it. [0] https://www.tindie.com/products/bobricius/picozx-motherboard-for-zx-spectrum-original-case/ https://www.tindie.com/products/bobricius/picozx-motherboard... [1] https://www.reddit.com/user/utopcell/comments/1esjxyu/dc32_pcb_draft_cost/ https://www.reddit.com/user/utopcell/comments/1esjxyu/dc32_p... [2] https://www.reddit.com/user/utopcell/comments/1esjz9n/dc32_components_draft_cost/ https://www.reddit.com/user/utopcell/comments/1esjz9n/dc32_c...

iamflimflam1 2y ago
> Oh definitely, I can see why you feel that way. It was quite exciting the first few times that I did it. Would you like to share some of the projects that you have sold?
- utopcell 2y ago
  Certainly. The most recent hardware run I was involved in was a group buy for a custom keyboard that a few of us got together and ordered from JLCPCB [1]. This was a lot of fun and trivially easy to do: We didn't have to provide any parts. We just uploaded the design and had JLCPCB ship the partially assembled boards. It cost us next to nothing. A project that I myself built end-to-end, from designing the schematics and manually laying out the 6-layer PCB on EaglePCB, to manually assembling the first couple prototypes, designing and 3D printing its enclosure, and doing a production run of 100 units was this one [2]. It was a tiny Linux box, only 18mm in width, built around an iMX233 (a 454MHz ARM9 CPU), with 64MiB of DRAM, Bluetooth / WiFi connectivity, a microSD slot, a microUSB port, and integrated battery charging. This was a ton of fun. I could SSH into it over WiFi! The first pic was after applying paste with a stencil and placing all the components but before "baking" it; the second pic shows a working prototype; the third shows the board and battery in the enclosure; and the fourth shows some Shapeways 3D prints in various materials for it. I even had an aluminum version CNCed at Protolabs! Again: I am a big fan of your Speccy project and I hope it gets funded. The 48K Speccy was the first "real" computer I was given as a kid and a have fond memories of it. That UV printed board looks awesome and I enjoyed reading your updates while you were working through getting the 40 keys to work independently. [1] https://github.com/yanghu/unicorne https://github.com/yanghu/unicorne [2] https://www.reddit.com/gallery/1gw1cbw https://www.reddit.com/gallery/1gw1cbw
  - iamflimflam1 2y ago
    Great projects - where are you selling them?

iamflimflam1 2y ago

> Oh definitely, I can see why you feel that way. It was quite exciting the first few times that I did it. Would you like to share some of the projects that you have sold?

utopcell 2y ago
Certainly. The most recent hardware run I was involved in was a group buy for a custom keyboard that a few of us got together and ordered from JLCPCB [1]. This was a lot of fun and trivially easy to do: We didn't have to provide any parts. We just uploaded the design and had JLCPCB ship the partially assembled boards. It cost us next to nothing. A project that I myself built end-to-end, from designing the schematics and manually laying out the 6-layer PCB on EaglePCB, to manually assembling the first couple prototypes, designing and 3D printing its enclosure, and doing a production run of 100 units was this one [2]. It was a tiny Linux box, only 18mm in width, built around an iMX233 (a 454MHz ARM9 CPU), with 64MiB of DRAM, Bluetooth / WiFi connectivity, a microSD slot, a microUSB port, and integrated battery charging. This was a ton of fun. I could SSH into it over WiFi! The first pic was after applying paste with a stencil and placing all the components but before "baking" it; the second pic shows a working prototype; the third shows the board and battery in the enclosure; and the fourth shows some Shapeways 3D prints in various materials for it. I even had an aluminum version CNCed at Protolabs! Again: I am a big fan of your Speccy project and I hope it gets funded. The 48K Speccy was the first "real" computer I was given as a kid and a have fond memories of it. That UV printed board looks awesome and I enjoyed reading your updates while you were working through getting the 40 keys to work independently. [1] https://github.com/yanghu/unicorne https://github.com/yanghu/unicorne [2] https://www.reddit.com/gallery/1gw1cbw https://www.reddit.com/gallery/1gw1cbw
- iamflimflam1 2y ago
  Great projects - where are you selling them?