ET-M08
ATmega328PB Nano-Style Board
Arduino-compatible 16 MHz board with USB-C and 5 V Qwiic
AED 39.00
Out of stockOverview
Arduino-compatible 16 MHz board with USB-C and 5 V Qwiic
The ET-M08 is built around the Microchip ATmega328PB — 8-bit AVR 16MHz, 32KB flash, 2KB SRAM, 1KB EEPROM, 2×UART, 2×I2C, 2×SPI.
Two Qwiic / STEMMA QT connectors let you chain it with other boards without soldering, and the 2.54 mm header fits a breadboard.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Arduino classes and kits
- 5 V sensor and relay projects
- Replacing a Nano with USB-C
Key features
What makes it different
MCU
Microchip ATmega328PB: 8-bit AVR 16MHz, 32KB flash, 2KB SRAM, 1KB EEPROM, 2×UART, 2×I2C, 2×SPI
USB
USB-C via CH340C (driverless on Win10+/macOS/Linux), DTR auto-reset for the Arduino IDE
Logic
5V I/O; 3.3V 600mA aux output
I/O
22 I/O on the header (Nano-like), Qwiic port at 5V
Qwiic / STEMMA QT
Two JST-SH connectors plus a 2.54 mm header — 3.3 V and 5 V hosts.
Open documentation
Schematic, BOM and layout notes published for every board.
Specifications
Technical specifications
| MCU | Microchip ATmega328PB: 8-bit AVR 16MHz, 32KB flash, 2KB SRAM, 1KB EEPROM, 2×UART, 2×I2C, 2×SPI |
|---|---|
| USB | USB-C via CH340C (driverless on Win10+/macOS/Linux), DTR auto-reset for the Arduino IDE |
| Logic | 5V I/O; 3.3V 600mA aux output |
| I/O | 22 I/O on the header (Nano-like), Qwiic port at 5V |
| Size | 45.7 × 17.8 mm |
|---|---|
| Mounting | 2 mounting holes (M2), one at each end |
| Connectors | 2 × Qwiic / STEMMA QT (JST SH 4-pin) · 24-pin 2.54 mm header · USB-C 16P receptacle (USB 2.0) — USB-C |
| Main IC | ATMEGA328PB-AU (LCSC C132230) |
| Revision | Rev A |
| Libraries | Arduino IDE with MiniCore (ATmega328PB) — Optiboot preloaded |
|---|
Performance
Memory
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VBUS | Power | 5V |
| 2 | 3V3 | Power | AP2112K 600mA |
| 3 | GND | Ground | Ground |
| 4 | RESET | Control | Active low |
| 5 | SDA | I²C | A4 / Qwiic SDA (5V) |
| 6 | SCL | I²C | A5 / Qwiic SCL (5V) |
| 7 | D13 | GPIO | SCK + LED |
| 8 | D2 | GPIO | INT0 |
| 9 | D3 | GPIO | INT1, PWM |
| 10 | D4 | GPIO | D4 |
| 11 | D5 | GPIO | PWM |
| 12 | D6 | GPIO | PWM |
| 13 | D7 | GPIO | D7 |
| 14 | D8 | GPIO | D8 |
| 15 | D9 | GPIO | PWM |
| 16 | D10 | GPIO | SS, PWM |
| 17 | D11 | GPIO | MOSI, PWM |
| 18 | D12 | GPIO | MISO |
| 19 | A0 | GPIO | ADC0 |
| 20 | A1 | GPIO | ADC1 |
| 21 | A2 | GPIO | ADC2 |
| 22 | A3 | GPIO | ADC3 |
| 23 | A6 | GPIO | Analog only |
| 24 | A7 | GPIO | Analog only |
Qwiic / STEMMA QT pins: GND, VIN, SDA, SCL (same on both connectors).
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-M08 ATmega328PB Nano-Style Board (assembled)
- 1 × 24-pin 2.54 mm male header, unsoldered
Getting started
- Plug in a Qwiic / STEMMA QT cable, or solder the header and wire VIN, GND, SDA and SCL
- Libraries: Arduino IDE with MiniCore (ATmega328PB) — Optiboot preloaded
Compare
Which USB board?
| ATmega328PB Nano-Style Board (this board)This board | ET-M04 RP2040 Dev Board | ET-M02 ESP32-S3 Dev Board | |
|---|---|---|---|
| What it does | Arduino-compatible 16 MHz board with USB-C and 5 V Qwiic | Dual-core 133 MHz, 2 MB flash, PIO, USB-C and Qwiic | Dual-core 240 MHz, 8 MB flash, USB OTG and Qwiic |
| Interface | — | — | — |
| Best for | Arduino classes and kits | PIO tricks: WS2812, VGA, extra UARTs | USB keyboards and MIDI devices (TinyUSB) |
| Price | 39 AED | 29 AED | 49 AED |
Downloads
Documents and design files
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.