Teensy 4.1
600 MHz Cortex-M7 with FPU and 1 MB RAM. The board legged-robot hobbyists reach for when the math needs to run at 1 kHz and a 16 MHz AVR is not going to do it.
The role it plays
Every serious robot needs two tiers. A microcontroller owns the control loop at a fixed rate with hard deadlines, because a missed deadline is a visible jolt. A Linux or GPU board owns perception, planning and networking, because those are bursty and best-effort. Nothing balance-critical belongs on the Linux side.
Typical use: Quadruped control loops, high-rate sensor fusion, multi-axis motion.
What the numbers actually mean
The headline figure is Cortex-M7 @ 600 MHz, hardware FPU (cpu), with 1 MB + 8 MB PSRAM (optional) as the next most load-bearing number (ram). At $32 in the compute tier it sits in the mid range: enough money that you should plan the mounting and wiring before ordering, but not so much that one mistake ends the project.
How it compares
Same subsystem, closest alternatives. The primary spec column is usually the one that decides it.
| Part | Price | Primary spec | Second spec |
|---|---|---|---|
| Teensy 4.1High-performance MCU | $32 | Cortex-M7 @ 600 MHz, hardware FPU | 1 MB + 8 MB PSRAM (optional) |
| Raspberry Pi 5 (8 GB)SBC, high-level brain | $80 | 4× Cortex-A76 @ 2.4 GHz | 8 GB LPDDR4X |
| Jetson Orin Nano SuperEdge GPU | $249 | 67 TOPS (INT8, sparse) | 1024-core Ampere |
| Jetson Orin NX 16 GBEdge GPU | $499 | 100 TOPS (INT8, sparse) | 1024-core Ampere |
| ESP32-S3Real-time MCU + Wi-Fi | $5 | 2× Xtensa LX7 @ 240 MHz | 512 KB SRAM + 8 MB PSRAM typical |
Where it shows up
It is a component-level choice rather than a defining part of a named platform — pick it for the subsystem it serves, not to match a reference build.