HardLabs

July23

biofoundry·lampdiagnosticspcb

July23 PCB layout, top view — open source NXP board by biofoundry

About the July23 PCB

July23 is an open source NXP PCB design by biofoundry, published on GitHub under the MIT license. It is a 2-layer board measuring 109.5 × 74 mm, with 57 components from 24 distinct parts.

Its main chip is the Teensy_3.1, from the NXP family. Other key parts include the LM358, CD74HC4067, MC78M05CDT and NCR405U. By type, the board carries 17 transistors, 12 capacitors, 11 resistors, 7 connectors, 5 ICs and 3 diodes.

From the project

PCB Design for the LAMP Diagnostics device

My frist KiCAD project, sorry for any errors!

Based on a device built by Frank B. Myers, Richard H. Henrikson,Jennifer Bone and Luke P. Lee

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0070266 https://github.com/fbmyers/MicroBAR

This is a collaborative effort from bioHack Sydney and BioFoundry.

Teensy's ADC / Voltage Reference ----------------

Main components on the July23

Teensy_3.1LM358CD74HC4067MC78M05CDTNCR405U

July23 bill of materials (BOM)

57 components, 24 distinct parts.

QtyPartRefs
1
Teensy_3.1
U1
1
LM358
U2
1
CD74HC4067
U3
1
MC78M05CDT
U4
1
NCR405U
U5
15
SFH3710
Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 +7
2
Q_NMOS_GSD
Q16, Q17
1
12v In
P1
1
HeatOut
P2
1
LED
P3
1
Temp1
P4
1
Temp2
P5
1
Temp3
P6
1
ExtPwr
P7
2
10k
RV1, RV2
3
LED
D1, D2, D3
6
100nF
C1, C2, C3, C5, C8, C9
1
22nF
C4
2
22uF
C6, C7
3
C
C10, C11, C12
Show 4 more
QtyPartRefs
3
1K
R1, R6, R10
3
6.8K
R2, R8, R9
3
R330
R3, R4, R5
2
100K
R7, R11

July23 design files

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

July23: common questions

What microcontroller does the July23 use?

The July23 is built around the Teensy_3.1, from the NXP family.

How big is the July23 PCB?

The July23 measures 109.5 × 74 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the July23?

57 components, from 24 distinct parts. The full bill of materials is listed on this page.

Where can I download the July23 design files?

From the biofoundry/lampdiagnosticspcb repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the July23 design in my own project?

Yes, under the terms of its MIT license, which biofoundry chose for the repository.

Can I test firmware for the July23 without the hardware?

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

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