ET-M07
ATtiny1616 Qwiic MCU
20 MHz tinyAVR with UPDI, 3.3–5 V, Qwiic
AED 15.00
Out of stockOverview
20 MHz tinyAVR with UPDI, 3.3–5 V, Qwiic
The ET-M07 is built around the Microchip ATtiny1616 (tinyAVR 1-series) — 20MHz, 16KB flash, 2KB SRAM, 10-bit ADC, DAC, peripheral touch controller. It runs from Directly from Qwiic/VIN 3.3V or 5V (1.8–5.5V).
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-programmable I²C helpers
- Capacitive touch buttons
- Low-power sensor nodes
Key features
What makes it different
MCU
Microchip ATtiny1616 (tinyAVR 1-series): 20MHz, 16KB flash, 2KB SRAM, 10-bit ADC, DAC, peripheral touch controller
Supply
Directly from Qwiic/VIN 3.3V or 5V (1.8–5.5V)
Programming
UPDI on J4 (SerialUPDI with any USB-UART + 4.7k, or jtag2updi)
I/O
10 GPIO + I2C on the header
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 ATtiny1616 (tinyAVR 1-series): 20MHz, 16KB flash, 2KB SRAM, 10-bit ADC, DAC, peripheral touch controller |
|---|---|
| Supply | Directly from Qwiic/VIN 3.3V or 5V (1.8–5.5V) |
| Programming | UPDI on J4 (SerialUPDI with any USB-UART + 4.7k, or jtag2updi) |
| I/O | 10 GPIO + I2C on the header |
| Size | 25.4 × 25.4 mm |
|---|---|
| Mounting | 4 × M2.5 holes, 2.54 mm from each corner |
| Connectors | 2 × Qwiic / STEMMA QT (JST SH 4-pin) · 14-pin 2.54 mm header |
| Main IC | ATTINY1616-MNR (LCSC C507118) |
| Revision | Rev A |
| Libraries | megaTinyCore (Arduino), Microchip MPLAB / AVR-GCC |
|---|
| JP1 (default Closed) | Cut to turn off the LED |
|---|---|
| JP2 (default Closed) | Cut to remove the host-side I2C pull-ups |
Performance
Memory
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VIN | Power | Sensor supply = host logic level |
| 2 | GND | Ground | Ground |
| 3 | SCL | I²C | I²C clock |
| 4 | SDA | I²C | I²C data |
| 5 | PA1 | GPIO | ADC, touch |
| 6 | PA2 | GPIO | ADC |
| 7 | PA3 | GPIO | ADC |
| 8 | PA4 | GPIO | ADC |
| 9 | PA5 | GPIO | ADC, PWM |
| 10 | PA6 | GPIO | ADC, DAC |
| 11 | PA7 | GPIO | ADC |
| 12 | PB2 | GPIO | UART TX |
| 13 | PB3 | GPIO | UART RX |
| 14 | PC0 | GPIO | GPIO |
Qwiic / STEMMA QT pins: GND, VIN, SDA, SCL (same on both connectors). I²C pull-ups (10 kΩ) are on the board; cut JP2 to remove them.
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-M07 ATtiny1616 Qwiic MCU (assembled)
- 1 × 14-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: megaTinyCore (Arduino), Microchip MPLAB / AVR-GCC
Compare
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|---|---|---|---|---|
| What it does | 20 MHz tinyAVR with UPDI, 3.3–5 V, Qwiic | Tiny 48 MHz RISC-V MCU that runs from 3.3 or 5 V Qwiic | Cortex-M0+ 64 MHz with SWD and level-shifted Qwiic | Dual-core 133 MHz, 2 MB flash, PIO, USB-C and Qwiic |
| Interface | — | — | — | — |
| Best for | Arduino-programmable I²C helpers | Custom I²C peripherals | Learning STM32 HAL and Rust embassy | PIO tricks: WS2812, VGA, extra UARTs |
| Price | 15 AED | 9 AED | 39 AED | 29 AED |
Downloads
Documents and design files
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.