PhotoMVP-1 Rev B, back from the factory.
Our guitar-pedal main board, still bare.
Boards
switchbridge, four switch inputs for about $2.44 of parts.
A small USB box for people who can't use a touchscreen.
RenderWhat it does
It lets someone drive a phone or a computer with big switches, a sip-and-puff tube or a head switch, and a light shows each switch firing.
Who it’s for
People who use switch access, and the teachers, therapists and families who set it up.
Why we built it
Phones and computers already support switch control; the hardware to use it costs far too much.
What we’re proud of
About $2.44 of parts per board (15 lines of parts, 62 by 40 mm), and it is a plain USB keyboard: nothing to pair or charge. The behaviour is proved on a real phone; no board has been built yet.
Technologies used
What it’s built with.
- KiCadOpen-source circuit board design software. We design every board in code, check it in KiCad and send it to the factory.
- STM32 and C firmwareSmall, dependable microcontrollers programmed in plain C. switchbridge runs on one.
- USB HIDThe standard way a USB device says it is a keyboard. It is why switchbridge needs no driver, no pairing and no battery.
- Switch accessThe built-in way phones and computers can be driven with one or a few big switches. switchbridge is the hardware half.
Get in touch
Want something like this? Say hello.
A person reads every message.
Email [email protected]
Text us
Text us: +1 888-344-3607. You text first; we reply only in that conversation, about your question. No marketing. Msg & data rates may apply. Reply STOP to opt out, HELP for help. SMS program
Our goods: shop.squatch.ccThe studio: squatch.cc