cyber60

A DIY-friendly 60% using nRF52840 and ZMK: the cyber.

Verified compatibility list: Link

Note:

ALPS and SMK version of revision E are still untested and set as a pre-release. These should work, but I recommend using revision D until the design is fully verified and tested.

Availability:

As an option to DIY, I’ll try and keep these available for purchase here: https://4pplet.com/ For DIY, the production files are avaliable in releases.

Software:

• Link to zmk-fork: https://github.com/4pplet/zmk
• Link to zmk-config (uf2-files in actions): https://github.com/4pplet/zmk-config-4pplet

Instructions:

• How to flash/update bootloader (this is needed to be able to flash firmware via USB): Link
• How to flash/update firmware using ZMK-config: Link
• How to flash/update firmware using ZMK-repo (most difficult): Link
• How to edit the ZMK-config repo using keymap-editor (easiest): Link

Specs cyber60:

• Module: Holyiot YJ-18010 for rev A-D, E73-2G4M08S1C for rev E
• Standard Tray Mount support (need battery cutout for internal battery)
• “rubber worm”-mount support (both bakeneko v1 and bakeneko v3). Case still need battery cutout or space for an internal battery.
• Lipo charger for single cell 3.7V li-po/li-ion batteries (recommended JST SH battery: https://www.upgradekeyboards.com/product/filament-power-batteries-ultra-thin-lipo/, if soldering JST PH, adafruit batteries work well, but make sure they are not too thick)
• RGB-led under Capslock for multi function indicator, not supported on SMK-version. (compatible led for rev A-D: https://www.aliexpress.com/item/1005003719602946.html)
• Four versions running the same FW-implementation. One MX, one MXHS, one ALPS, one SMK
• USB horizontal placement is classic GH60, same as GH60, plain60, voyager60 etc.
• (rev B and newer) Underglow for cozy glow
• (rev B and newer) Buzzer for indicator or sweet tunes
• (rev B and newer) Rotary encoder at right most posision in split backspace or off board (compatible encoder: https://www.aliexpress.com/item/1005001265188249.html)
• (rev B and newer) Reverse polarity protection for battery
• (rev E and newer) Arbitrary battery polarity

Todo:

• Test and verify ALPS and SMK E1 release.
• Improve flash/update ZMK instruction and documentation.
• Improve ZMK Studio implementation.

Layout support (non hotswap):

MX-version:

MX Revisions:

• A1 - initial revision/prototype
• A2 (prerelease) - flipped PMOS-transistor error in Rev A1. Added pulldown on enable to battery voltage measurement circuit, so it does not have to be disabled in code, only enabled. Minor silkscreen changes.
• B1 (prerelease) - Adding underglow, buzzer and rotary support. Simplifying voltage measurement circuit (tiny bit more leak current). Changing matrix to duplex.
• B2: Fixing underglow issue, adding n mos to fully turn off the p mos that powers the underglow. Adding reverse polarity protection for the battery.
• C1: Changing layout support for better solderability of module. Adding transistor cutoff for battery voltage measurement for no leak current. Switching to ws2812c in 2020-package. Rotating ANSI-enter stabilizer 180 degrees.
• C2: Minor adjustments to pads and soldermask
• D1: Removed 3U split space support, added 6.5u split into 2.75u + 1u + 2.75u.
• E1: Changed power curcuit (now high voltage mode), changed module, minor QOL changes

ALPS-version

ALPS Revisions:

• A1 - initial revision/prototype, builds on MX rev A2
• B1 (prerelease) - Adding underglow, buzzer and rotary support. Simplifying voltage measurement circuit (tiny bit more leak current). Changing matrix to duplex.
• B2: Fixing underglow issue, adding n mos to fully turn off the p mos that powers the underglow. Adding reverse polarity protection for the battery.
• C1: Changing layout support for better solderability of module. Adding transistor cutoff for battery voltage measurement for no leak current. Switching to ws2812c in 2020-package. Rotating ANSI-enter stabilizer 180 degrees.
• C2: Minor adjustments to pads and soldermask
• D1: Removed 3U split space support
• E1: Changed power curcuit (now high voltage mode), changed module, minor QOL changes

SMK-version

SMK Revisions:

• A1: Initial revision/prototype, builds on ALPS rev A1
• B1: (prerelease) - Adding underglow, buzzer and rotary support. Simplifying voltage measurement circuit (tiny bit more leak current). Changing matrix to duplex.
• B2: Fixing underglow issue, adding n mos to fully turn off the p mos that powers the underglow. Adding reverse polarity protection for the battery.
• C1: Changing layout support for better solderability of module. Adding transistor cutoff for battery voltage measurement for no leak current. Switching to ws2812c in 2020-package. Rotating ANSI-enter stabilizer 180 degrees.
• C2: Minor adjustments to pads and soldermask
• D1: Removed 3U split space support
• D2: Fixed error in footprint for backspace keys.
• E1: Changed power curcuit (now high voltage mode), changed module, minor QOL changes

MX Hot swap-version

Layout support:

Default ZMK firmware:

MXHS Revisions:

• C1: Initial revision, based on MX C1.
• C2: Minor adjustments to pads and soldermask
• D1: Removed 3U split space support
• D2: Changed to anti-shear footprints
• E1: Changed power curcuit (now high voltage mode), changed module, minor QOL changes