User Manual

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1. INTRODUCTION AND OVERVIEW
RE08A is a rotary encoder kit which comes with a slotted disc (8 slots) and a simple interface
sensor board. No further soldering is required. Rotary encoder is a sensor or transducer used
to convert the data of rotary motion into a series of electrical pulses which is readable by
controller. The slotted disc has a 35mm outside diameter with 8 slots that provides 16
transitions. The optical sensor is used to sense the 16 transitions of the slotted disc. With
these transitions, controller is able to recognize the rotary angle of the disc. With this concept,
a rotary encoder can be employed in a DC motor shaft for the controller to ‘know’ its current
position.
This rotary encoder kit has been design with the features of:
• Industrial grade PCB with high reliability yet professional outlook.
• Every component is soldered properly and every kit is tested before being shipped
to customer.
• Simple 3 pin interface (+5, Gnd and Sig).
• Included On board green LED as indicator.
• Direct connection to microcontroller (internal pull-up to 5V).
• Up to 1 KHz (1000 pulse/sec).
• Disc size: 35mm (outer diameter) x 3mm(inner diameter)
• Sensor board size: 12mm (height) x 35mm (length) x 15mm (width)
This document explains the method to use RE08A.