# KillerBoard
Welcome to KillerBoard, a 65% wireless hot-swappable mechanical keyboard which is made in a sandwich mounted style. It has a 3d printed case, custom PCB and a ProMicro controller for it brains.

I got the motivation to make this when I saw other cool keyboards the people have built for ``#Highway``. Also, I loved making my [Hackpad](https://github.com/MrKillerShaunBa/BajajPad) and wanted to try making something which was bigger, better and wireless of-course.

## Featues

- 65% compact layout
- Wireless, uses Promicro Controller
- ZMK firmware
- Hotswappable
- Brown tactile switches
- 6 deg typing angle
- 3D Printed case and plate
- Sandwich mount

![full](./assets/full.png)

## CAD

![case](./assets/case.png)
![parts](./assets/Case_parts.png)
![3dF](./assets/3d_pcb_f.png)
![3dB](./assets/3d_pcb_b.png)

## PCB

![schematic](./assets/schematic.png)
![PCB](./assets/PCB.png)
![front](./assets/pcb_front.png)
![back](./assets/pcb_back.png)

## ZMK Keymap 

![layer0](./assets/firm_1.png)
![layer1](./assets/firm_2.png)

### BOM

| Product | Quantity | Source | Price(INR) | Price($) | Link |
| :-----: | :-----: | :-----: | :-----: | :-----: | :-----: |
| Keycaps | 1 | StacksKB | 1299 | 15.10 | [here](https://stackskb.com/store/veekos-gradient-keycaps-cherry-profile-135-keys/) |
| MX Style Switches | 25*3 | Genesispc | 2400 | 27.91 | [here](https://www.genesispc.in/products/c-equalz-x-tkc-kiwi-switches?variant=43389284286517) |
| Stabilizers | 1 | StacksKB | 1595 | 18.55 | [here](https://stackskb.com/store/durock-smokey-screw-in-stabilizers-v2/) |
| PCB | 5 | JLCPCB | | 11.05 | Includes Shipping (Used Coupon) |
| Case | 1 | Printing Legion | - | ~5 | Only shipping |
| Hotswap Sockets | 10*7 | Meckeys | 536 | 6.23 | [here](https://meckeys.com/shop/accessories/keyboard-accessories/key-switches/kailh-hot-swap-socket/) |
| 1N4148 Diodes | 10*7 | StacksKB | 105 | 1.22 | [here](https://stackskb.com/store/1n4148-through-hole-diode/) |
| ProMicro nRF52840 | 1 | Robu.in | 715 | 8.33| [here](https://robu.in/product/promicro-nrf52840-development-board/) |
| Slide Switch | 1 | Robu.in | 3 | 0.035 | [here](https://robu.in/product/ss-12f21g5-slide-1p2t-angled-switchheight5mm/) |
| Battery | 1 | Robu.in | 256 | 2.97 | [here](https://robu.in/product/wly602540-600mah-3-7v-single-cell-rechargeable-lipo-battery/) |
| PCB receptacle female | 1 | Amazon | 135 | 1.57 | [here](https://amzn.in/d/0Ydhh59) |
| PCB receptacle male | 2 | Robu.in | 68 | 0.79 | [here](https://robu.in/product/361019115sg107601-jiln-2-54x1-9machined-pin-header-1x15p-180-l7-65-upper-pinpoint0-46-bottom-pinpoint0-46-au1u-pps/) |
| Non-slip feet | 100 | Amazon | 130 | 1.51 | [here](https://amzn.in/d/hfOWean) |
| M3x25mm bolts | 12 | Robu | 167 | 1.93 | [here](https://robu.in/product/easymech-set-m3-x-25mm-socket-head-cap-allen-bolt-nut-12-pcs/) |
| M3x15mm bolts | 10 | EDS | 139  | 1.61 | [here](https://store.edsystems.in/thunderbolt-set-of-m3-x-15mm-socket-head-cap-black-(allen)-bolt-and-nut-(10-pcs)) | M3x4mm heatset insert | 25 | Robu | 82 | 0.95 | [here](https://robu.in/product/m3-x-4-mm-brass-heat-set-knurl-threaded-round-insert-nut-25-pcs/) |
| M3x4mm heatset inserts | 25 | Robu | 82 | 0.95 | [here](https://robu.in/product/m3-x-4-mm-brass-heat-set-knurl-threaded-round-insert-nut-25-pcs/) |

Total Cost: About $108-110