Watch old
About the Watch old PCB
Watch old is an open source AVR/Arduino PCB design by sulkith, published on GitHub under the MIT license. It is a 2-layer board measuring 37.8 × 37.8 mm, with 33 components from 7 distinct parts.
Its main chip is the ATMEGA328-MU, from the AVR/Arduino family. By type, the board carries 16 diodes, 6 connectors, 4 switches, 4 resistors, 1 IC and 1 crystal.
It belongs with the wearables designs in this gallery.
From the project
WristWatch
Main components on the Watch old
Watch old bill of materials (BOM)
33 components, 7 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATMEGA328-MU | QFN-32-1EP_7x7mm_Pitch0.65mm | U1 |
| 1 | Crystal | Crystal_SMD_2012-2pin_2.0x1.2mm_HandSoldering | Y1 |
| 6 | Conn_01x01 | TestPoint | J1, J2, J3, J4, J5, J6 |
| 1 | Battery_Cell | BatteryHolderCR2032 | BT1 |
| 4 | SW_Push | Panasonic_EVQPUJ_EVQPUA | SW1, SW2, SW3, SW4 |
| 16 | LED | LED_0603_HandSoldering | D1, D2, D3, D4, D5, D6, D7, D8 +8 |
| 4 | R | R_0603 | R1, R2, R3, R4 |
Watch old design files
The KiCad project lives in the sulkith/BCDWristWatch repository on GitHub; these links point at the commit this page was built from.
Watch old: common questions
What microcontroller does the Watch old use?
The Watch old is built around the ATMEGA328-MU, from the AVR/Arduino family.
How big is the Watch old PCB?
The Watch old measures 37.8 × 37.8 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Watch old?
33 components, from 7 distinct parts. The full bill of materials is listed on this page.
Where can I download the Watch old design files?
From the sulkith/BCDWristWatch repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Watch old design in my own project?
Yes, under the terms of its MIT license, which sulkith chose for the repository.
Can I test firmware for the Watch old without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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