HardLabs

Bellwether

floren·bellwether·board/depraz_board.kicad_pcb

Bellwether PCB layout, top view — open source PIC board by floren
Simulate this board

About the Bellwether PCB

Bellwether is an open source PIC PCB design by floren, published on GitHub under the CC-BY-NC-4.0 license. It is a 2-layer board measuring 60 × 40 mm, with 14 components from 11 distinct parts.

Its main chip is the PIC16F1454-IP, from the PIC family. Other key parts include the TXB0104D, S-817B20AY-B2-U and PMW3389DM. By type, the board carries 5 ICs, 4 resistors, 3 connectors and 2 capacitors.

From the project

The Bellwether mouse

This repo should contain everything you need to make a Bellwether mouse.

Note that I've made several of these myself, but it's possible that I've forgotten a step or component somewhere.

I'm willing to answer questions to the best of my ability. I'll also consider assembling some portions of the mouse and mailing it out; send me an email if you want this.

The 3d models and the circuit are CC BY-NC-SA licensed. I believe this means that "group buys" (where 1 person coordinates ordering a bunch of PCBs and parts) are ok under this model.

Main components on the Bellwether

PIC16F1454-IPTXB0104DS-817B20AY-B2-UPMW3389DM

Bellwether bill of materials (BOM)

14 components, 11 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
PIC16F1454-IP
U1
2
TXB0104D
U2, U3
1
S-817B20AY-B2-U
U4
1
PMW3389DM
U5
1
Switches
J1
1
PIC Programmer
J2
1
USB
J3
1
0.1UF
0.1uF
C1
1
4.7UF
4.7uF
C2
3
1M
R1, R2, R3
1
13
R4

Bellwether design files

The KiCad project lives in the floren/bellwether repository on GitHub; these links point at the commit this page was built from.

Bellwether: common questions

What microcontroller does the Bellwether use?

The Bellwether is built around the PIC16F1454-IP, from the PIC family.

How big is the Bellwether PCB?

The Bellwether measures 60 × 40 mm, has 2 copper layers and is 1.6002 mm thick.

How many components are on the Bellwether?

14 components, from 11 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Bellwether design files?

From the floren/bellwether repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Bellwether design in my own project?

It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Bellwether without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug PIC firmware against it before you order a PCB.

Similar boards