
ST Discovery Boards are a far cry from the $40 this supplier is asking. You can purchase it directly from ST or one of their approved vendors for around $20. The board itself and the free development environments are very good in their own right and a great way to get into 32-bit ARM programming once you've outgrown the Arduino. (But it's easier to start with a low-power STM32F1-based Blue Pill board.)

LAFVIN Super Starter Kit for Arduino R3 Mega2560 Mega328 Nano with Detailed Tutorial - Compatible with Arduino IDE
11 Review

Gikfun Screw Shield Expansion Board: Enhance Arduino UNO R3 with the EK7007 Add-On
11 Review

🎁 Ultimate BBC Micro bit Sensor Starter Kit: Keyestudio 37-in-1 Box with Tutorial, Compatible with V1.5 & V2, Gift for Kids and Adults (Microbit Board Not Included)
11 Review

🌐 MCIGICM 2 Channel DC 5V Relay Module: Optocoupler Low Level Trigger Expansion Board for Arduino UNO R3, DSP, ARM, PIC, AVR, STM32, Raspberry Pi
11 Review

M.2 Screw Kit: Easy Mounting for NVMe SSDs on ASUS Motherboards
19 Review

🔩 Enhance Repairs and Upgrades with 400pcs Laptop Screws w/Blue Nylok – Premium Titanium Nitride Screwdriver & Notebook Computer Screw Kit Set
3 Review

💾 M.2 NVMe SSD Screws for Asus, Gigabyte, and MSI Motherboards - Laptop M.2 Screws
8 Review

🔧 TWYZONE Set: 10pcs Repair Replacement Screws + 1pcs Philips Head Screwdriver for Unibody MacBook Pro - A1278 A1286 A1297 - Bottom Case Compatibility (Not for Retina Display)
6 Review