HardLabs

Flex

jeffc·nrf52-watch-obsolete·kicad/watch-mk2/flex/flex/flex.kicad_pcb

Flex PCB layout, top view — open source board by jeffc

About the Flex PCB

Flex is an open source PCB design by jeffc, published on GitHub. It is a 2-layer board measuring 33.6 × 41.5 mm, with 8 components from 7 distinct parts.

By type, the board carries 3 resistors, 2 switches, 1 transistor, 1 connector and 1 diode.

It belongs with the wearables, power & battery and displays & leds designs in this gallery.

From the project

obsolete repository - see https://github.com/jeffc/nrf52-watch-firmware

This repo is, at present, a work-in-progress playground for designing and building a smartwatch based on the nrf52840 microcontroller from Nordic.

RayTac MDBT50Q nRF52840 Module Main brains. nRF52840 chipset chosen for BLE capability and low (<1uA) sleep current. This is the module used in the Sparkfun Breakout Sharp LS018B7DH02 1.8" Memory LCD with FLExLight Frontlight Always-on display. Chosen for size and small power consumption. The LS018B7DH02 isn't sold directly by Sharp, and no datasheet is currently available. Unknowns are currently Does the display require 3.3V or 5V power? Does…

Flex bill of materials (BOM)

8 components, 7 distinct parts.

QtyPartRefs
1
Si1308EDL
Q1
1
AXT510124
P1
2
MCSLPT4644B4PHTR
SW1, SW2
1
LED
D1
1
100k
R1
1
3
R2
1
3
R3

Flex design files

The KiCad project lives in the jeffc/nrf52-watch-obsolete repository on GitHub; these links point at the commit this page was built from.

Flex: common questions

How big is the Flex PCB?

The Flex measures 33.6 × 41.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Flex?

8 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the Flex design files?

From the jeffc/nrf52-watch-obsolete repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Flex design in my own project?

The repository has no license, so all rights stay with jeffc. Use it as a reference, and ask the author before reusing the design.

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