Rebound is an ortholinear keyboard with an ergonomically-friendly 7° typing angle. Inspired by the 4x6 design of a Let's Split, its halves have rebounded back together to fit widely-available 60% cases. There's also room down the middle for for three more switches — or two switches + rotary encoder! It also supports 2U thumb keys and RGB breakout strips.
The bare version of the PCB comes with ~55 through-hole diodes. The soldered version has SMD diodes, reset switch and 5.1k resistors already installed.
You'll also need:
A controller such as Mainframe (Pro Micro and Elite-C supported with available adapter)
48-51 MX or Choc switches
- A 60% keyboard case or available sandwich-style plates
- Key caps
Rotary encoder + knob for controlling volume (and so much more)
Reset switch, accessible from the bottom of most 60% cases
- Through-Hole USB-C Port for rerouting USB to the standard 60%/Tofu position (Mainframe or Elite-C v4 required)
- JST Connector for using a USB daughter board required for more premium 60% cases (Mainframe or Elite-C v4 required)
Mainframe is a microcontroller designed exclusively for Rebound. It does NOT have a USB port and instead routes signal to the Rebound PCB for use with the add-on through-hole USB-C port or JST SH 4-pin connector. The controller is ATmega32u4-based, uses DFU bootloader, features ESD protection, an on-board reset switch and a WS2812B LED that syncs up with the rest of Rebound's RGB underglow. It is completely hotswappale and does not require an adapter, so it has a lower profile than other MCUs, increasing case compatibility.
Already have microcontrollers laying around? Rebound's Pro Micro Adapter is connected with included header pins from either above the switchplate or below the PCB, allowing Rebound to be powered by any MCU with a Pro Micro footprint. Elite-C V4s can be placed under the PCB for enabling Rebound's add-on through-hole USB-C port or JST SH 4-pin connector. Unlike with Montsinger Mainframe, wires to D+, D- and VBUS would need to be hand-soldered.