Fermion: 8421 Absolute Position Encoder (Breakout, Horizontal)

The Fermion 8421 Absolute Position Encoder is a compact breakout board designed for deterministic position sensing in microcontroller and control projects. Featuring a horizontal layout and direct 4-bit digital output, it delivers 16 distinct position states without requiring complex decoding routines. It suits makers, students, and engineers building embedded or industrial hardware.

Deterministic 16-position sensing

The encoder provides 16 discrete absolute positions, allowing your system to determine exact orientation immediately at power-on. This absolute reading eliminates the need for homing cycles or continuous pulse tracking.

Direct 4-bit digital output

Using standard 8421 encoding, the board delivers direct 4-bit digital signals straight to your microcontroller inputs. This provides straightforward interfacing with minimal software overhead.

Compact horizontal breakout design

The breakout board uses a low-profile horizontal orientation to fit comfortably into tight spaces. Its compact form factor makes it easy to mount within custom enclosures and mechanical assemblies.

Embedded and industrial readiness

Engineered for reliable position detection, the module is well suited for industrial controls, rotary selection interfaces, and embedded monitoring systems. The dedicated digital output ensures stable and repeatable readings.

Downloads & documentation

• Product wiki (DFRobot)