2 layers30.7 × 43.2 mm Bob, the printed circuit board in 3D

Bob

Orbtrace & supporting hardware circuit diagrams etc.

Size: 30.7 × 43.2 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 55
Nets: 53
Pads: 196
Tracks, vias: 555, 84
Pours: 3
Routed: Yes
KiCad: KiCad 5 (file 20171130)
Created: 29 May 2021
Updated: 11 Oct 2023

Overview

Bob is an open-source printed circuit board by orbcode, from the orbcode/orbtrace_hw repository on GitHub. It is a 2-layer board of 30.7 × 43.2 mm with 55 parts on 53 nets, routed with 555 tracks and 84 vias.

It is built around the SN74LVC2T45DCURE4, 74LVCH8T245BQ and CBG160808U301T, with the SI2301CDS and DMG1012UW among its other parts. Its parts include 21 resistors, 12 capacitors, 6 connectors, 5 inductors and 3 ICs.

Main components

README

README.md

ORBTrace Hardware

This is the repository for various hardware for the ORBTrace project. There are various bits and pieces here but the most important ones are;

ORBTrace Mini V1.0
ORBMule demo board
Breakout board for PMOD

You can also find the openSCAD source materials, and vinyl graphics, for the ORBTrace Mini V1 case.

These materials are provided in open form to learn from and improve on. We have deliberately chosen to not provide Gerbers for ORBTrace mini or STLs for the caseworks since your manufacturing processes are likely different to ours. Drop a note if you need those.

Parts

Qty	Value	Footprint	References
15	100R	Resistor_SMD:R_0603_1608Metric	R3, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R18, R20
6	100nF	Capacitor_SMD:C_0603_1608Metric	C5, C6, C7, C8, C9, C10
5	CBG160808U301T	Inductor_SMD:L_0603_1608Metric	L1, L2, L3, L4, L5
4	10uF	Capacitor_SMD:C_0603_1608Metric	C1, C3, C11, C12
3	10K	Resistor_SMD:R_0603_1608Metric	R2, R17, R19
2	10nF	Capacitor_SMD:C_0603_1608Metric	C2, C4
2	1K	Resistor_SMD:R_0603_1608Metric	R1, R4
2	Fiducial	Fiducial:Fiducial_0.75mm_Mask1.5mm	FID1, FID2
2	LED	LED_SMD:LED_0603_1608Metric	D1, D2
2	SN74LVC2T45DCUR	Package_SO:VSSOP-8_2.4x2.1mm_P0.5mm	U2, U3
2	Si2301CDS	Package_TO_SOT_SMD:SOT-23	Q1, Q2
1	100K	Resistor_SMD:R_0603_1608Metric	R21
1	74LVCH8T245	Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm	U1
1	DEBUG HEADER	Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical_SMD	J2
1	DEBUG+TRACE HEADER	Connector_PinHeader_1.27mm:PinHeader_2x10_P1.27mm_Vertical_SMD	J1
1	DISCO HEADER	Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical	J4
1	DMG1012UW	Package_TO_SOT_SMD:SOT-323_SC-70	Q3
1	PMOD1	bob:pmod_pin_array_6x2	J5
1	PMOD2	bob:pmod_pin_array_6x2	J6
1	SERIAL HEADER	Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical	J3

The 54 most common of 55 parts.

Questions

How big is the Bob PCB?

It measures 30.7 × 43.2 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Bob use?

55 parts, built around the SN74LVC2T45DCURE4, 74LVCH8T245BQ, CBG160808U301T and SI2301CDS. 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 Bob KiCad files?

From the orbcode/orbtrace_hw repository on GitHub, at the commit this page was made from: the board is hw/bob/bob.kicad_pcb and its schematic hw/bob2/bob.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Bob design in my own project?

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

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/orbcode-orbtrace-hw-bob" title="Bob 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/orbcode-orbtrace-hw-bob.jpg" alt="Bob" width="1200" height="900">

A picture that opens the board, for a README

[![Bob](https://pcbkit.io/embed/boards/orbcode-orbtrace-hw-bob.jpg?size=s)](https://pcbkit.io/boards/orbcode-orbtrace-hw-bob)

Source

Repository: orbcode/orbtrace_hw
Board file: hw/bob/bob.kicad_pcb
Commit: aa6b16f
Licence: Not stated

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