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Unified C4 Daughterboard and Molex Pico-EZmate Cable

Unified C4 Daughterboard and Molex Pico-EZmate Cable

Regular price €9,95 EUR
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The Unified Daughterboard Project is an open source project designed to standardize the USB daughterboards used in custom keyboards, spearheaded by many community contributors such as ai03. The newest releases by the project team are the S1 and C4 daughterboards. Extra cables can be purchased here.

This new C4 revision has the same formfactor as the previous C3 version, but uses the new Molex Pico-EZmate connector. We include two cables- one with a JST termination and one with molex to help ensure backwards compatibility. 

  • Square formfactor, allowing for backwards compatibility
  • ESD protection, overcurrent protection, overvoltage protection, shielding noise decoupling, and single-path grounding to the keyboard case
  • New durable Molex Pico-EZmate Connector that clips in vertically
  • 1:1 connector pinout, allowing for backwards compatibility
  • Backwards compatible with keyboards that used the C3 Unified Daughterboard
  • Molex and JST terminated cables included


  • Overall size: 18 x 16.5 mm
  • Screw holes: 14 x 12.5 mm apart
  • Hardware: 4x M2 screws
  • Connector: Molex Pico-EZmate (781710004)
  • PCB layers: 4 (7628 stackup)
  • Cable length: 170mm
  • Further specs and implementation details here


1 x Unified C4 Daughterboard

1 x 150mm Molex Pico-EZmate Cable

1 x 150mm Molex Pico-EZmate to JST Cable

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