Rotary Indexer Kit with Arduino Uno – Build a Precise 8-Position Turntable for Pick-and-Place Automation

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Position a turntable at eight precisely indexed angular positions with the push of a button, and you’ve built the rotational heart of a pick-and-place machine. This kit walks you through mounting the NEMA17 stepper, wiring the A4988 driver, and writing Arduino code that listens for button presses to advance the index. A crisp 0.96‑inch OLED displays the current station and status, so you always know exactly where the turntable stops. By the end, you’ll have a repeatable 8‑position feeder mechanism — the same core motion used to load components in automatic assembly cells.

What You'll Build

A motorized turntable that moves to one of eight predefined positions each time a tactile button is pressed. The OLED shows the active index number and a short state message (e.g., “Idle”, “Moving”, “Done”). You’ll configure the A4988’s microstepping for smooth, vibration‑free motion, and write the firmware to store the last position in EEPROM so the index survives a power cycle. The result is a reliable station selector ready to sit beneath a pick‑and‑place head, a tool changer, or a sorting conveyor.

What You'll Learn

• Interface a NEMA17 bipolar stepper with an Arduino Uno using an A4988 driver and set microstepping to 1/16 for 0.1125° per step resolution.
• Write interrupt‑driven button handling so the indexer responds in under 1 ms, avoiding missed presses during long stepper pulses.
• Drive a 0.96‑inch I2C OLED to display real‑time index number, direction, and error conditions without blocking the control loop.
• Design a finite state machine that sequences through Move, Wait, and Confirm states, guaranteeing the turntable never overshoots a position.

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for CBSE Class 11‑12 students building mechatronics models, B.Tech ECE/Mechanical undergraduates prototyping pick‑and‑place or tool‑turret concepts for Smart India Hackathon, and ATL Tinkering Lab mentors demonstrating precision motion. If you’re constructing a DIY SMD parts placer, a 3D‑printer filament changer, or an automated inspection jig, this kit gives you the indexing core in a single, well‑documented package.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.