Hub 04 · Micro Bench
Small chips, real machines.
For the developer who wants code with consequences: boards worth owning, projects that finish in a weekend, and the bench truths.
Match the board to the project
| Board | Price | Silicon | Why it earns the slot |
|---|---|---|---|
| Raspberry Pi Pico 2 | $5 | Dual Cortex-M33 or dual RISC-V cores, 520 KB SRAM | Choose one CPU architecture; the ARM and RISC-V pairs do not run simultaneously. Programmable I/O supports custom hardware interfaces. |
| ESP32-S3 | Check board seller | Dual LX7, Wi-Fi + BLE, vector inst. | ESP32-S3 provides Wi-Fi and Bluetooth LE; choose a development board with the required memory, pins and certifications. |
| Arduino Uno R4 WiFi | Check Arduino store | Renesas RA4M1 + ESP32-S3 copro | A 32-bit Renesas microcontroller with an ESP32-S3 connectivity coprocessor and official Arduino documentation. |
| Teensy 4.1 | Check PJRC store | 600 MHz Cortex-M7, 1 MB RAM | A 600 MHz Cortex-M7 board with libraries for audio and embedded projects. Check power and I/O limits before wiring. |
Three weekends to hooked
Weekend one: a macro pad
A Pico 2, ten switches and CircuitPython's HID library. You will type on something you built by Sunday night.
Weekend two: a sensor that texts you
ESP32 + a soil moisture probe + a webhook. The plant lives, and you have shipped an IoT product with one dependency.
Weekend three: a synth voice
Teensy audio library, two potentiometers, one speaker. Real-time DSP with zero RTOS reading required.
Soldering truths
Temperature is not bravery
Follow the solder, flux, component and tool manufacturers’ temperature guidance. Use the appropriate tip and avoid prolonged heating; one setting is not suitable for every alloy or board.
Flux is not optional
Use flux appropriate to the solder and electronics being assembled. Follow its safety data sheet and cleaning instructions.
Buy the fume extractor
Rosin-based solder flux fumes can cause asthma. Use suitable local exhaust ventilation and follow the flux safety guidance; a small fan or carbon filter is not a universal assurance of protection.
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