Screen Tapper & Alert System for Medtronic Percept Devices

This repository contains files for a customizable screen tapping device designed for prolonged local field potential (LFP) recordings using the Medtronic Percept™ devices. The system automates screen tapping at varrying intervals and alerts the user when abnormalities are detected via a photodiode sensor.

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🔧 Required Materials

Medtronic Equipment

• Medtronic Clinician Tablet
• Medtronic Clinician Telemetry Module (CTM)
• Medtronic Device Charger

Microcontroller & Power

• Arduino Uno
• USB Type A to Type B Cable
• 24V Power Adapter
• USB Wall Charger

Custom PCB and Components

• PCB (Designed and purchased via EasyEDA)
• Buzzer
• 6-pin Dual-Row Wire-to-Board Connector
• 2× Micro USB-B Female Ports
• DC Power Receptacle
• Jumper wires

Peripheral Devices

• Commercial Screen Auto Clicker

Tools

• Computer with Arduino IDE installed
• 3D Printer (for custom casing)
• Soldering Iron + Supplies

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⚙️ Device Functionality

The Arduino is programmed using the Arduino IDE and performs the following functions:

• Triggers Tapper 1(Pin 13) every 1 hour, with a 5-second follow-up signal
• Triggers Tapper 2(Pin 11) every 10 minutes
• Monitors a photodiode input and activates a buzzer alert if abnormal activity is detected

Power is supplied via a 24V wall adapter (with USB conversion), with optional battery pack for backup power.

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🖥 PCB Overview

The PCB includes:

• Two Micro USB-B ports for tapper connections
• One 6-pin dual-row wire-to-board connector
• DC barrel jack input
• Buzzer for photodiode signal alerts

6-Pin Connector Mapping:

• Top left pin: Signal to Top USB Port (1-hour interval)
• Second pin: Signal to Bottom USB Port (10-minute interval)
• Bottom right pin: Shared ground for both USB ports, power input, and buzzer

Soldering was completed in-house using the components listed in the Bill of Materials.

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🧰 3D-Printed Casing

The printed case:

• Holds the clinician tablet alongside the Arduino and PCB assembly
• Includes openings for USB and DC power connections
• Allows wire access from Arduino to PCB
• Mounts a flexible photodiode arm at a central screen position for optimal detection

A light shield can slide on the photodiode arm to reduce false alerts from ambient light.

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💻 Programming Notes

• Arduino code is uploaded using the Arduino IDE
• Adjust timing intervals and photodiode threshold values in the .ino script
• Ensure correct board and COM port are selected during upload

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📁 File Contents