Selling USB conversion kits for IBM 3277 Microswitch boards

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lilwebsite

25 Sep 2025, 05:39

This is a conversion kit for the microswitch variant of the 3277 keyboards. This is kit is only compatible with switches branded "1SW12", which are current sourcing switches. This also includes a solenoid controller, which is capable of 150mA @ 12V continuous using a USB 2.0 voltage source. These kits have been quality control tested and include a document for each board showing that the solenoid controller and the switch board itself have all been properly tested and work. This kit comes with QMK pre-installed and with vial compatibility out of the box.

Included in the kit:

- 1 Switch board replacement
- 1 Controller board for USB
- 1 Solenoid controller, with the option to disable it with software
- A typed document detailing the installation process, with pictures
- Replacement screws for the mounting the backplate to the new board
- A reverse engineered schematic for the solenoid that is in the 3277 keyboards
- A USB flash drive copy of the documents and the firmware source code
- 4 Switch pullers for the SW series switches, to aid disassembly

I only have 4 of these kits, and they're the only ones I'm making. I sold all of my electronics equipment, so there will be no more of them.
I'm asking for $400, not including shipping, and I will ship anywhere internationally. If you are interested, add/message me on discord, my username is the same as my forum username.
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