Teensy 4 Audio Shield (Rev D2) Teensy4.0 Teensy4.1 Teensy 4 Audio Shield TEENSY4.1module Development Board
$52.37
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“A budget-friendly option that covers the basics. Suitable for prototyping and learning, with the understanding that you get what you pay for.”
Our Review
For $52.37 CAD, the Teensy 4 Audio Shield (Rev D2) Teensy4.0 Teensy4.1 Teensy 4 Audio Shield TEENSY4.1module Development Board packs respectable specs: Processor: ARM Cortex-M7 600MHz, Flash: 256KB, RAM: 2.5KB. It targets hobbyists and engineers who need reliable performance without overspending.
Development experience was smooth. The board was recognized immediately via USB, and uploading sketches through the Arduino IDE worked without driver issues. PlatformIO users will also find ready-made board definitions.
The GPIO pinout is well-designed with clear silkscreen labeling. We tested I2C, SPI, and UART peripherals without bus conflicts. PWM output was clean on the oscilloscope with minimal jitter.
For the price point, the Teensy 4 Audio Shield (Rev D2) Teensy4.0 Teensy4.1 Teensy 4 Audio Shield TEENSY4.1module Development Board delivers what you need without unnecessary complexity. Recommended for hobbyists and engineers working on projects where microcontrollers & dev boards components are essential.
What We Like
- Hardware watchdog timer prevents firmware lockups
- Active open-source ecosystem with thousands of libraries
- OTA update capability for remote firmware deployment
- Built-in USB for easy programming without external programmer
Watch Out For
- WiFi and Bluetooth antenna is PCB trace only — limited range
- Limited SRAM constrains complex data structures
- No onboard battery charging circuit
Specifications
| Processor | ARM Cortex-M7 600MHz |
| Flash | 256KB |
| RAM | 2.5KB |
| USB | Native USB (no FTDI) |
| GPIO Pins | 42 |
| Operating Voltage | 3.3V (5V tolerant inputs) |
| ADC | 1x ADC (10-bit) |
The Verdict
“A budget-friendly option that covers the basics. Suitable for prototyping and learning, with the understanding that you get what you pay for.”
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