4 ms·

ice40UL1K is a $1.60 for a single bga unit on digikey. Probably well under a dollar wholesale. Add in a few cents for a crystal, some capacitors, pin headers,

by zombees 11y ago

ice40UL1K is a $1.60 for a single bga unit on digikey. Probably well under a dollar wholesale. Add in a few cents for a crystal, some capacitors, pin headers, a vreg, and the pcb, probably costs $1-2 to produce. I should mention that someone capable of doing hobby level bga work could easily make their own at around $30 through a pcb batching service. In terms of electronic complexity, it looks pretty trivial.

jacquesm 11y ago
Didn't you mean $3?
- zombees 11y ago
  Instead of 30? No, it typically costs a lot to do one-off pcbs. Even through a batching service (where you share a large panel with other people), they'll still usually make you pay for a few of them. Also, all of the components are going to cost way more if you just want to buy one of each. Headers are tenths of a cent per pin but from digikey you'll probably have to buy a strip for a dollar or so. Likewise with crystals, vregs and caps.
  - openchip 11y ago
    its 4 layer PCB with 275 micron via pad and 75 micron mechanical drill. I am not joking our PCB fab confirmed its doable technology for them.
    - tcas 11y ago
      I think many PCB fabs will say they can do it, the question is how much they will charge. 75 micron drill is crazy.
      - openchip 11y ago
        PCB confirmed the "DIPSY easysolder PCB" deliver on 20th july, this is special downgraded version of the PCB, 2 layers, drill 0.15, trace space 50 micron..
  - unwind 11y ago
    OSH Park (probably the most well-known such service) costs $10/square inch for a 4-layer board, for three copies of a board. As a ballpark figure, this board should be no larger than 1/5 square inch, so that's $2, for three boards. Agree on low volumes of the other components, although things like Seeed Studio's Open Parts Library (http://www.seeedstudio.com/depot/OPLopen-parts-library-catalog-c-136_138/?ref=side http://www.seeedstudio.com/depot/OPLopen-parts-library-catal...) is pretty nice for the very basics. Update: Didn't check if this board meets OSH Park's limitations.
    - zombees 11y ago
      In general you can't really do bga with osh park without fudging their specs significantly. Some have been able to do it but you tend to end up with peeling traces. Also, don't forget shipping on all the bits and pieces.

by zombees 11y ago

jacquesm 11y ago

Didn't you mean $3?

zombees 11y ago
Instead of 30? No, it typically costs a lot to do one-off pcbs. Even through a batching service (where you share a large panel with other people), they'll still usually make you pay for a few of them. Also, all of the components are going to cost way more if you just want to buy one of each. Headers are tenths of a cent per pin but from digikey you'll probably have to buy a strip for a dollar or so. Likewise with crystals, vregs and caps.
- openchip 11y ago
  its 4 layer PCB with 275 micron via pad and 75 micron mechanical drill. I am not joking our PCB fab confirmed its doable technology for them.
  - tcas 11y ago
    I think many PCB fabs will say they can do it, the question is how much they will charge. 75 micron drill is crazy.
    - openchip 11y ago
      PCB confirmed the "DIPSY easysolder PCB" deliver on 20th july, this is special downgraded version of the PCB, 2 layers, drill 0.15, trace space 50 micron..
- unwind 11y ago
  OSH Park (probably the most well-known such service) costs $10/square inch for a 4-layer board, for three copies of a board. As a ballpark figure, this board should be no larger than 1/5 square inch, so that's $2, for three boards. Agree on low volumes of the other components, although things like Seeed Studio's Open Parts Library (http://www.seeedstudio.com/depot/OPLopen-parts-library-catalog-c-136_138/?ref=side http://www.seeedstudio.com/depot/OPLopen-parts-library-catal...) is pretty nice for the very basics. Update: Didn't check if this board meets OSH Park's limitations.
  - zombees 11y ago
    In general you can't really do bga with osh park without fudging their specs significantly. Some have been able to do it but you tend to end up with peeling traces. Also, don't forget shipping on all the bits and pieces.