Teensy 4.1 Lockable USB Development Board (Without Pins)
$54.93
Disclosure: CircuitTrail earns from qualifying purchases as an Amazon Associate. Prices and availability may change.
“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
The Teensy 4.1 Lockable USB Development Board (Without Pins) delivers solid performance for its category. With Processor: ARM Cortex-M4 72MHz, Flash: 32KB, RAM: 64KB, it covers the essentials that most makers and engineers need for their projects.
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.
Overall, the Teensy 4.1 Lockable USB Development Board (Without Pins) fills its role well. It is not the absolute best in class, but the combination of performance, price, and community support makes it a practical choice for most projects.
What We Like
- Multiple I/O options: I2C, SPI, UART, ADC, PWM
- Hardware watchdog timer prevents firmware lockups
- Extensive community support and online tutorials
- Active open-source ecosystem with thousands of libraries
Watch Out For
- Pin labels on the board are tiny and hard to read
- Deep sleep wake sources are restricted on some GPIO pins
- ADC accuracy is limited without external reference or calibration
Specifications
| Processor | ARM Cortex-M4 72MHz |
| Flash | 32KB |
| RAM | 64KB |
| 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.”
Related Microcontrollers & Dev Boards Components
ESP32 WROOM-32 Development Board WiFi Bluetooth
$12.99
Check Price →
Teensy 4.1 Lockable Version USB Development Board Without Ethernet (No Pins)
$51.50
Check Price →
USB Teensy 2.0 AVR Development Board Chip Model ATMEGA32U4 Expandable Learning Experimental Keyboard Experimental
$17.29
Check Price →