Important Note

This entire repo was AI created - including all of the data within. The intent was to A) help me with my personal electronics inventory; and B) see how I could use AI to make that process a bit easier. DO NOT TRUST!

Circuit Playground TFT Gizmo - Bolt-on Display + Audio Amplifier

Overview

Extend and expand your Circuit Playground projects with a bolt-on TFT Gizmo that lets you add a lovely color display in a sturdy and reliable fashion. This PCB looks just like a round TFT breakout but has permanently affixed M3 standoffs that act as mechanical and electrical connections.

Specifications

• Display: 1.54” 240x240 IPS TFT
• Outer Diameter: 53.3mm x 53.3mm
• Height: 9.4mm / 0.4”
• Weight: 23.0g / 0.8oz
• Standoff Height: 8mm (as of Oct 30, 2019)
• Material: FR4 PCB with pre-soldered standoffs

Key Features

High-Quality Display

• 1.54” IPS TFT: 240x240 pixel resolution
• Full Color: 16-bit color depth (65,536 colors)
• IPS Technology: Wide viewing angles and excellent color reproduction
• Backlight Control: PWM backlight control for brightness adjustment
• Fast SPI: High-speed SPI interface for smooth graphics

Audio Amplifier

• Class D Amplifier: High-efficiency audio amplification
• Speaker Connector: Molex PicoBlade connector for speakers
• 3W Maximum: Up to 3W audio output power
• Low Distortion: Clean audio reproduction
• Volume Control: Software-controlled volume

Expansion Connectors

• 2x STEMMA Connectors: 3-pin JST PH connectors
• NeoPixel Support: Connect NeoPixel strips directly
• Servo Support: Connect servos for motion control
• Sensor Integration: Connect STEMMA-compatible sensors
• Modular Design: Easy expansion and customization

Mechanical Design

• Bolt-On: Secure mechanical connection to Circuit Playground
• M3 Standoffs: Pre-soldered 8mm standoffs for proper spacing
• Battery Clearance: 8mm height provides room for LiPo battery underneath
• Stable Platform: Rigid connection for reliable operation
• Removable: Can be attached and detached multiple times

Circuit Playground Compatibility

Supported Boards

• Circuit Playground Express: Recommended for best performance
• Circuit Playground Bluefruit: Excellent performance with BLE
• Circuit Playground Classic: Works but slow (not recommended)

Performance Notes

• Express/Bluefruit: Fast SPI hardware for smooth graphics
• Classic: Bit-banged SPI results in very slow display updates
• CircuitPython: Limited memory on Express, Bluefruit recommended
• Arduino: Full functionality on all supported boards

Display Specifications

Technical Details

• Resolution: 240 x 240 pixels
• Color Depth: 16-bit (RGB565)
• Viewing Angle: 170° (IPS technology)
• Brightness: Adjustable via PWM backlight control
• Interface: SPI communication
• Driver IC: ST7789 or compatible

Graphics Capabilities

• Text Display: Multiple font sizes and styles
• Graphics: Lines, circles, rectangles, filled shapes
• Images: Display bitmap images and sprites
• Animations: Smooth animations with fast refresh
• Color: Full 16-bit color support

Audio System

Amplifier Specifications

• Type: Class D digital amplifier
• Power Output: Up to 3W into 4-8 ohm speakers
• Efficiency: High efficiency for battery operation
• THD: Low total harmonic distortion
• Frequency Response: Full audio range

Speaker Compatibility

• Connector: Molex PicoBlade 2-pin connector
• Impedance: 4-8 ohm speakers supported
• Power: Up to 3W continuous
• Size: Various speaker sizes compatible
• Mounting: Speakers can be mounted externally

STEMMA Connectivity

Connector Specifications

• Type: JST PH 3-pin connectors
• Voltage: 3.3V logic, 5V power available
• Current: Adequate current for most STEMMA devices
• Pinout: Power, Ground, Signal/Data
• Compatibility: Standard STEMMA ecosystem

Compatible Devices

• NeoPixel Strips: Direct connection for LED strips
• Servos: Standard 3-pin servo connection
• Sensors: STEMMA-compatible sensors
• Actuators: Motors, solenoids, relays
• Custom Devices: Any 3-pin STEMMA device

Programming Support

Arduino IDE

• Full Support: Complete Arduino IDE compatibility
• Graphics Libraries: Adafruit GFX library support
• Display Driver: ST7789 library for display control
• Audio Libraries: Audio playback and generation
• Example Code: Comprehensive example collection

CircuitPython

• Display Support: displayio library for graphics
• Touch Support: Capacitive touch integration
• Audio Support: Built-in audio playback
• File System: Store images and sounds on flash
• Interactive Development: REPL for live coding

MakeCode

• Limited Support: Basic display functionality
• Block Programming: Visual programming interface
• Educational: Good for learning and simple projects
• Graphics: Basic graphics and text display

Applications

Educational Projects

• Interactive Displays: Show sensor data and status
• Learning Tools: Visual programming feedback
• Science Projects: Data visualization and logging
• Art Projects: Digital art and animations

Practical Applications

• Status Displays: System status and monitoring
• User Interfaces: Menu systems and controls
• Data Loggers: Visual data presentation
• Gaming: Simple games and interactive entertainment

Creative Projects

• Digital Art: Animated displays and light shows
• Interactive Installations: Motion-responsive displays
• Wearable Electronics: Costume and fashion integration
• Home Automation: Control panels and status displays

Power Requirements

Power Consumption

• Display: Varies with brightness and content
• Backlight: Major power consumer
• Audio: Additional power when amplifier active
• STEMMA Devices: Additional power for connected devices

Power Management

• Backlight Control: Reduce brightness to save power
• Sleep Modes: Turn off display when not needed
• Audio Control: Disable amplifier when not in use
• Efficient Operation: Optimize for battery life

Assembly and Installation

Package Contents

• 1x Circuit Playground TFT Gizmo PCB
• 12x M3 screws for attachment
• Pre-soldered M3 standoffs (8mm height)
• Documentation and getting started guide

Installation Process

1. Align Boards: Position Gizmo over Circuit Playground
2. Insert Screws: Use provided M3 screws
3. Tighten Evenly: Ensure even pressure and good contact
4. Test Connection: Verify mechanical and electrical connection
5. Program: Upload test code to verify functionality

Best Practices

• Handle Carefully: Avoid excessive force during assembly
• Check Alignment: Ensure proper pin alignment
• Test Incrementally: Verify each function as you build
• Document Setup: Keep notes on configuration and connections

Troubleshooting

Display Issues

• Blank Display: Check power and SPI connections
• Garbled Graphics: Verify SPI timing and connections
• Dim Display: Adjust backlight PWM settings
• Color Problems: Check color depth and driver settings

Audio Issues

• No Sound: Verify speaker connections and amplifier enable
• Distorted Audio: Check speaker impedance and power levels
• Low Volume: Adjust software volume settings
• Noise: Check power supply and grounding

Connection Issues

• Loose Connection: Check screw tightness and standoff alignment
• Intermittent Operation: Verify all electrical connections
• STEMMA Problems: Check connector orientation and power
• Communication Errors: Verify SPI configuration and timing

Package Contents

• 1x Circuit Playground TFT Gizmo (assembled)
• 12x M3 screws for attachment
• Pre-soldered 8mm M3 standoffs
• Documentation and example code access

Important Notes

• Standoff Height: 8mm standoffs allow LiPo battery underneath
• Performance: Express/Bluefruit recommended for best performance
• Memory: CircuitPython works better on Bluefruit due to memory
• Classic Compatibility: Works but very slow, not recommended
• Speaker Required: Audio amplifier requires external speaker

Advantages

• High-Quality Display: Excellent IPS display with great colors
• Audio Integration: Built-in amplifier for sound projects
• Expansion Options: STEMMA connectors for easy expansion
• Secure Mounting: Robust mechanical connection
• Professional Appearance: Clean, finished look

Limitations

• Size Constraints: Limited by Circuit Playground form factor
• Power Consumption: Display and audio can drain battery quickly
• Classic Performance: Very slow on Circuit Playground Classic
• Cost: More expensive than basic displays
• Complexity: More complex than simple displays

Recommended Accessories

• Compatible speakers with Molex PicoBlade connectors
• NeoPixel strips for STEMMA connectors
• Servos for motion control projects
• LiPo battery for portable operation
• STEMMA-compatible sensors and actuators