2 layers65 × 74.5 mm
2 layers24.1 × 17.3 mm
Ring Watch V1
juansala/ring-watchA watch that fits on your finger. Features an ATtiny85 and the PCF8523 real-time clock IC to change the color of an RGB LED based on the time of day.
- Size
- 24.1 × 17.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 15
- Nets
- 15
- Pads
- 50
- Tracks, vias
- 143, 16
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 22 Nov 2020
- Updated
- 14 Feb 2021
Overview
Ring Watch V1 is an open-source printed circuit board by juansala, from the juansala/ring-watch repository on GitHub. It is a 2-layer board of 24.1 × 17.3 mm with 15 parts on 15 nets, routed with 143 tracks and 16 vias.
It is built around the ATTINY85-20SU and PCF8523T. Its parts include 5 resistors, 3 capacitors, 2 ICs, 2 connectors and 1 diode. It belongs with the wearables boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
2README
README.mdring-watch
A watch that fits on your finger. Features an ATtiny85 and the PCF8523 real-time clock IC to change the color of an RGB LED based on the time of day.
Libraries:
TinyBMP280 SoftwareSerial TinyWireM RTCLib
Parts
15| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 2.2uf | Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1, C2, C3 |
| 3 | 30 ohm | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, R2, R3 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R4, R5 |
| 1 | 32.768 | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | ATtiny85-20SU | Package_SO:SOIJ-8_5.3x5.3mm_P1.27mm | U1 |
| 1 | Battery Mechanical Switch Pad | TestPoint:TestPoint_Keystone_5019_Minature | H1 |
| 1 | CR2023 Socket | Battery:BatteryHolder_Keystone_3034_1x20mm | J2 |
| 1 | LED_RGB | LED_SMD:LED_RGB_5050-6 | D1 |
| 1 | PCF8523T | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | Programming Header | Connector_PinHeader_1.00mm:PinHeader_2x03_P1.00mm_Vertical | J1 |
Questions
How big is the Ring Watch V1 PCB?
It measures 24.1 × 17.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Ring Watch V1 use?
15 parts, built around the ATTINY85-20SU and PCF8523T. 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 Ring Watch V1 KiCad files?
From the juansala/ring-watch repository on GitHub, at the commit this page was made from: the board is Ring Watch V1/Ring Watch V1.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ring Watch V1 design in my own project?
Its repository states no licence, so its author keeps all rights: ask juansala before reusing the design.
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