Jaycar Leonardo Tiny ATmega32U4 Main Board – Compact Arduino-Compatible Dev Board, 16MHz, 10 Pins

Your project's too small for a full-size Leonardo. You need a board that fits in the palm of your hand without sacrificing the ATmega32U4 you already know. This 23 × 20mm dev board gives you 16MHz clock speed, 32kB flash (4kB bootloader), and 1kB EEPROM in a footprint that disappears into a robotics chassis or a sewn e-textile sleeve. Three analogue pins, three digital pins, and four power pins all route to large gold-plated tabs. Clip on alligator leads for a quick bench test, or stitch conductive thread straight through the pads for wearable builds. 500mA output on VCC means you can drive small peripherals without a separate regulator. Runs on 5VDC in, 5VDC out. No mystery wiring. No breakout board needed. Just plug in, code, and ship your prototype before the weekend's gone

• ATmega32U4 processor at 16MHz with 32kB flash (4kB bootloader) and 1kB EEPROM
• 10 pins total: 4 power, 3 analogue I/O, 3 digital I/O – all on gold-plated tabs for clip or thread connections
• 500mA output on VCC pins; 5VDC in and out
• 23 × 20mm footprint – fits where a standard Leonardo won't
• Arduino-compatible pinout, so your existing sketches port over without rewriting