Keyboard Builders' Digest / Projects
Cheap03xD
The wireless Cheap03xD is an affordable open-source split by Lander03xD.
Published January 5, 2026
Lander03xD shared this small wireless split: the Cheap03xD – with nice!nanos and 14250 batteries.
Cheap03xD is a keyboard I made for the purpose of being very affordable to make. […] This is not my first board I've made and won't be my last. I did not include any rgb to get the most out of the battery. Everything is open source – Lander03xD_.
The PCB is reversible, so both the left and right keyboard halves use the same board. The author kept the dimensions within 10 × 10 cm to minimize manufacturing costs.
Features
- 36 keys (5x3+3)
- MX switches, hotswap
- reversible and sub 10x10 cm PCB
- nice!nano V2 devboard
- replaceable 14250 batteries
- ZMK firmware
Warning! The design does not include a protection circuit for the battery. According to Saixos (and the nicenano documentation?), nice!nano and clones expect the battery to come with a protection circuit against (among others) undervoltage and overcurrent. Using a battery without such a circuit can be dangerous and result in a battery fire if the battery experiences abnormal conditions.
Resources
Published on Mon 5th Jan 2026. Featured in KBD #204 (source).
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