4 layers40 × 40 mm
2 layers50.5 × 47.5 mm
TinyWatch
Peer202/TinyWatchMinimalist Watch using a Attiny416 MCU
- Size
- 50.5 × 47.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 18
- Nets
- 35
- Pads
- 76
- Tracks, vias
- 100, 15
- Pours
- 25
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 17 Nov 2024
- Updated
- 16 Apr 2025
Overview
TinyWatch is an open-source printed circuit board by Peer202, from the Peer202/TinyWatch repository on GitHub. It is a 2-layer board of 50.5 × 47.5 mm with 18 parts on 35 nets, routed with 100 tracks and 15 vias.
It is built around the ATTINY416-SN, MPU-6050 and CR2032. Its parts include 4 capacitors, 4 connectors, 2 resistors, 2 ICs and 1 diode. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATTINY416-SN
SOIC-20-300mil-40℃~+105℃ 1.8V~5.5V 128Byte 18 20MHz 256Byte 4KB 8 Bit AVR Built-in FLASH SOIC-20-300mil Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
MPU-6050
QFN-24-EP(4x4)-40℃~+85℃ 16bit 1KB 2.375V~3.46V 5uA Accelerometer Gyroscope I2C X,Y,Z X,Y,Z ±16g ±2000dps QFN-24-EP(4x4) Accelerometers ROHSTDK InvenSenseAccelerometers
CR2032
-- Unclassified goods ROHSMaxellUncategorised
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 0.1pf | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C3 |
| 2 | 1.8k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 1 | +3.3V | TestPoint:TestPoint_Pad_D2.0mm | TP3 |
| 1 | 10nf | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | 2.2nf | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1 |
| 1 | ATtiny416-S | Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm | U1 |
| 1 | BT_1 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3 |
| 1 | BT_2 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J4 |
| 1 | CR2032 | Battery:BatteryHolder_Multicomp_BC-2001_1x2032 | BT1 |
| 1 | Display | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J2 |
| 1 | GND | TestPoint:TestPoint_Pad_D2.0mm | TP4 |
| 1 | MPU-6050 | Sensor_Motion:InvenSense_QFN-24_4x4mm_P0.5mm | U2 |
| 1 | SCL | TestPoint:TestPoint_Pad_D2.0mm | TP1 |
| 1 | SDA | TestPoint:TestPoint_Pad_D2.0mm | TP2 |
| 1 | STAT_LED | LED_SMD:LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | UPDI | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1 |
Questions
How big is the TinyWatch PCB?
It measures 50.5 × 47.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the TinyWatch use?
18 parts, built around the ATTINY416-SN, MPU-6050 and CR2032. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the TinyWatch KiCad files?
From the Peer202/TinyWatch repository on GitHub, at the commit this page was made from: the board is TinyWatch/pre-display-removal/TinyWatch.kicad_pcb and its schematic TinyWatch/TinyWatch.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the TinyWatch design in my own project?
Its repository states no licence, so its author keeps all rights: ask Peer202 before reusing the design.
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