KillerSplit
Split keyboard designed during #Grounded built during #Blueprint. An ergonomic, wireless, split, low-profile keyboard. This is a fusion between a Corne and a ZMK Voyager. It has a 6-column layout like the Corne, but the thumb buttons are placed like a Voyager. I got the inspiration and motivation after looking at so many cool designs in r/ErgoMechKeyboards so wanted to make one of my own.
Created by
Shaunak Bajaj
Tier 2
1418 views
3 followers
pi.obj
gave kudos to KillerSplit ago
you singel handedly made badly want to make one of my own! thenkss
nagariashivansh
gave kudos to KillerSplit ago
Hooowwwww thats amazing
1Mon ⚡
approved KillerSplit ago
Tickets awarded: 125 tickets
Tier: 2
really nice job on the split and good luck getting used to using it! the tenting is super nice!
CAN ⚡🚀
submitted KillerSplit for review ago
Shaunak Bajaj
submitted KillerSplit for review ago
Shaunak Bajaj
added to the journal ago
Screens Working Now
I was able to get basic screens running by making changes in the firmware. The cool custom ones were not getting compiled because the new version of ZMK doesn't support older LGVL versions.
I accidentally damaged one of the OLEDs while soldering.
Iamalive 🚀
requested changes for KillerSplit ago
As you've already submitted this to another project, you cannot submit this project to blueprint.
Shaunak Bajaj
submitted KillerSplit for review ago
Shaunak Bajaj
added to the journal ago
Completed it
I loaded the firmware on both halves for testing. First, I had to remove the reset buttons since I had soldered them incorrectly. The boards were being continuously reset. Then, I found that the left was running perfectly, but 3 columns on the right weren't working. After following the steps on the ZMK website and changing the pin mapping in the config, I concluded that the pins on the Promicro had stopped working. I begged my parents to allow me to order a new one, and after a few days, they agreed.
When I used the new one, it worked like a charm. I quickly added the keys and put them in the cases, attached the legs, and they were finally complete. The firmware was not compiling for the OLED displays due to version issues in ZMK. I will add them later.
Shaunak Bajaj
added to the journal ago
The beginning of the end
Added the battery under the Promicros, attached the plate and added all the keys. Also fixed the 5mm standoffs to the back of the PCBs. Will load the firmware next and test it.
Shaunak Bajaj
added to the journal ago
Soldered small things
Soldered the On/Off switches, reset switches, battery connectors, sockets on both the PCBs. Also soldered the millmax pins on both the ProMicro microntrollers.
Shaunak Bajaj
added to the journal ago
Diodes done
Diodes are an essential part of a keyboard. I have used standard 1N4148 through hole diodes in this keyboard.
It was very time taking to solder these diodes since after doing a few diodes normally I noticed that I could not solder them from the front since the plate I designed for the keyboard is the maximum 2.2mm allowed for low profile switches. When I soldered from the front the gap between the plate and PCB would be too much and the switches were not even touching the PCB. Then I had to de-solder them and start again. I had to trim all the legs to a very short length and solder them from the back of the PCB.
Shaunak Bajaj
added to the journal ago
Soldered the Hotswap sockets on the left pcb
Finished soldering the hotswap sockets on the left PCB. Still difficult to align and solder them. Finally they are over. Will start soldering diodes next.
Shaunak Bajaj
added to the journal ago
Soldered the Hotswap sockets on the right pcb
Started soldering the hotswap sockets on the right PCB. Since the contacts are small, they are difficult to align and solder them. My solder not being of good quality doesn't help either.
Shaunak Bajaj
added to the journal ago
Finally received all parts
Waited for all the parts to arrive for more than a month. Finally received all of them except the case. Will start assembling them now. Can wait to build and use this keyboard!!!
Charging 0.1 hours since it is not allowing me to publish with zero hours
Shaunak Bajaj
started KillerSplit ago
11/30/2025 - Finally received all parts
Waited for all the parts to arrive for more than a month. Finally received all of them except the case. Will start assembling them now. Can wait to build and use this keyboard!!!
Charging 0.1 hours since it is not allowing me to publish with zero hours
12/1/2025 - Soldered the Hotswap sockets on the right pcb
Started soldering the hotswap sockets on the right PCB. Since the contacts are small, they are difficult to align and solder them. My solder not being of good quality doesn't help either.
12/4/2025 - Soldered the Hotswap sockets on the left pcb
Finished soldering the hotswap sockets on the left PCB. Still difficult to align and solder them. Finally they are over. Will start soldering diodes next.
12/12/2025 - Diodes done
Diodes are an essential part of a keyboard. I have used standard 1N4148 through hole diodes in this keyboard.
It was very time taking to solder these diodes since after doing a few diodes normally I noticed that I could not solder them from the front since the plate I designed for the keyboard is the maximum 2.2mm allowed for low profile switches. When I soldered from the front the gap between the plate and PCB would be too much and the switches were not even touching the PCB. Then I had to de-solder them and start again. I had to trim all the legs to a very short length and solder them from the back of the PCB.
12/13/2025 12 AM - Soldered small things
Soldered the On/Off switches, reset switches, battery connectors, sockets on both the PCBs. Also soldered the millmax pins on both the ProMicro microntrollers.
12/13/2025 12 PM - The beginning of the end
Added the battery under the Promicros, attached the plate and added all the keys. Also fixed the 5mm standoffs to the back of the PCBs. Will load the firmware next and test it.
12/23/2025 - Completed it
I loaded the firmware on both halves for testing. First, I had to remove the reset buttons since I had soldered them incorrectly. The boards were being continuously reset. Then, I found that the left was running perfectly, but 3 columns on the right weren't working. After following the steps on the ZMK website and changing the pin mapping in the config, I concluded that the pins on the Promicro had stopped working. I begged my parents to allow me to order a new one, and after a few days, they agreed.
When I used the new one, it worked like a charm. I quickly added the keys and put them in the cases, attached the legs, and they were finally complete. The firmware was not compiling for the OLED displays due to version issues in ZMK. I will add them later.
12/25/2025 - Screens Working Now
I was able to get basic screens running by making changes in the firmware. The cool custom ones were not getting compiled because the new version of ZMK doesn't support older LGVL versions.
I accidentally damaged one of the OLEDs while soldering.