SMD protoboard: Difference between revisions
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We had a stack of [https://twitter.com/sha2017badge/status/1169681130418843648 eth0 badge.team DIY badges] at the space, but we're running out. | We had a stack of [https://twitter.com/sha2017badge/status/1169681130418843648 eth0 badge.team DIY badges] at the space, but we're running out. | ||
Feb 18: f0x hacked up a design, going to try ordering HASL from JLCPCB. | |||
== Which? == | == Which? == | ||
Revision as of 11:19, 19 February 2020
| Project SMD protoboard | |
|---|---|
| |
| 1.27mm pitch SMD protoboard | |
| Status | Initializing |
| Contact | noopwafel, f0x |
| Last Update | 2020-02-19 |
electroniceel's advanced protoboard has 1.27mm pitch pads for SMD components, mixed with standard 2.54mm through-holes.
We had a stack of eth0 badge.team DIY badges at the space, but we're running out.
Feb 18: f0x hacked up a design, going to try ordering HASL from JLCPCB.
Which?
Most convenient size is probably 5x3cm protoboard - the repo has gerbers already panelized and these fit 6 protoboards per 100mm*100mm panel. There are two alternative designs:
- protoboard on both sides
- protoboard on one side, ground plane on the other side
1.2mm thickness is a good compromise for weight.
Pricing
Best idea may be 200 1.2mm protoboards of 50mm*30mm: if they're willing to use HASL, JLCPCB would do this for 44eur (because we're under the 22eur VAT limit), which makes it 22c/boards. Worth a try!
Assuming 50 panels (300 protoboards):
- JLCPCB: HASL/1.2mm: approx 85eur, ENIG/1.2mm: approx 105eur including shipping/VAT. Supposedly JLCPCB don't want to manufacture these unless you choose ENIG.
- Elecrow: HASL/1.2mm: approx 105eur including shipping/VAT. Supposedly Elecrow will do these with HASL.
This basically means the raw cost is at least 35c/board (or 30c/board if we get JLCPCB to do them in HASL). Plan would be to put them in revbank: either individually, or panels (of 6).
Misc
We could spin our own custom panels with revspace logo/name (on the breakoff tabs?).