2 layers

H bridge

Rpo for pcb layouts, gerber and gcode files

Copper layers: 2
Thickness: 1.6 mm
Parts: 20
Nets: 14
Pads: 40
Tracks, vias: 118, 0
Routed: Yes
KiCad: KiCad 5 (file 20171130)
Created: 18 Jun 2018
Updated: 30 Aug 2022

Overview

H bridge is an open-source printed circuit board by androiders, from the androiders/pcbs repository on GitHub. It is a 2-layer board with 20 parts on 14 nets, routed with 118 tracks and 0 vias.

It is built around the BC547, BD139 and BD140. Its parts include 6 transistors, 6 connectors, 4 resistors and 4 diodes. It belongs with the interfaces and adapters boards of this library.

Main components

README

README.md

View this project on CADLAB.io.

pcbs

Repo for pcb layouts, gerber and gcode files

Ki-Cad

PCB layout:

Use as wide traces as possible. 1mm preffered.
Dont use "filled areas" if possible. It does not make good geometry in flatcam
Don't forget to set origin marker
Export gerber: use auxiliary axis

FlatCam

geometry generation:

If you are using thru-hole components or using bottom layer, mirror around y axis for both geometry and Drilling
Edit drill files if necessary for fewer drill sizes
TODO: test double sided layout by mirroring around center axis!

Isolation generation:

Current isolation mill depth to test: 0.04 mm (0.05 was tested and seems to work fine!) (Common copper depth is about 0.03 mm)
Current feedrate on isolation milling to test: 60 mm/s
spindle speed 12000 rpm
use 0.2 mm tool width on cnc generation
2 passes with 0.1 overlap

Cutout generation:

Current cutout mill depth: 1.6 mm
Current feedrate on cutout milling: 40 mm/s
spindle speed 12000 rpm

FlatCam defaults:

put a link in ~/.FlatCAM/defaults.json

bCNC

Probe:

Fastfeed: 120
Probefeed: 25
Probe points: 4/cm (in each direction)

Drilling:

Current drill plunge rate to test 20 mm/s
spindle speed: 12000 rpm
Drill depth: 1.6

Parts

Qty	Value	Footprint	References
6	Conn_01x01_Male	Connector_PinHeader_1.27mm:PinHeader_1x01_P1.27mm_Vertical	J1, J2, J3, J4, J5, J6
4	1N4001	Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal	D1, D2, D3, D4
4	R	Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal	R1, R2, R3, R4
2	BC547	Package_TO_SOT_THT:TO-92_Inline	Q1, Q6
2	BD139	Package_TO_SOT_THT:TO-126-3_Vertical	Q3, Q5
2	BD140	Package_TO_SOT_THT:TO-126-3_Vertical	Q2, Q4

Questions

What parts does the H bridge use?

20 parts, built around the BC547, BD139 and BD140. 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 H bridge KiCad files?

From the androiders/pcbs repository on GitHub, at the commit this page was made from: the board is h-bridge/h-bridge/h-bridge.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the H bridge design in my own project?

Its repository states no licence, so its author keeps all rights: ask androiders before reusing the design.

Category and platform

Interfaces and adapters

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/androiders-pcbs-h-bridge" title="H bridge in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/androiders-pcbs-h-bridge.jpg" alt="H bridge" width="1200" height="900">

A picture that opens the board, for a README

[![H bridge](https://pcbkit.io/embed/boards/androiders-pcbs-h-bridge.jpg?size=s)](https://pcbkit.io/boards/androiders-pcbs-h-bridge)

Source

Repository: androiders/pcbs
Board file: h-bridge/h-bridge/h-bridge.kicad_pcb
Commit: 6aef352
Licence: Not stated
Copies: 2 copies in 1 repository

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