HardLabs

SAX 3 dev

tomcombriat·TES_e-sax·hardware/v3d1/SAX_3_dev.kicad_pcb

SAX 3 dev PCB layout, top view — open source NXP board by tomcombriat

About the SAX 3 dev PCB

SAX 3 dev is an open source NXP PCB design by tomcombriat, published on GitHub under the TAPR-OHL-1.0 license. It is a 2-layer board measuring 142.2 × 90.4 mm, with 44 components from 18 distinct parts.

Its main chip is the Teensy3.2_breadboard_friendly, from the NXP family. Other key parts include the 74HC165. By type, the board carries 29 resistors, 8 connectors, 4 ICs and 3 capacitors.

It belongs with the audio and sensors designs in this gallery.

From the project

This is the program and hardware for the TES e-sax

More infos: https://t-e-s.frama.site/en/tesaxophone

The E-sax is an EWI made out of a real sax. It outputs MIDI signals that can be used to generate sounds using a synthesizer for instance the 10k synth. It is design to provide saxophone players a digital instrument to which they can transition easily. Additionnaly from the "standard" behavior it also have features that are allowed by a digital instrument:

Main components on the SAX 3 dev

74HC165Teensy3.2_breadboard_friendly

SAX 3 dev bill of materials (BOM)

44 components, 18 distinct parts.

QtyPartRefs
3
74HC165
U1, U2, U3
1
Teensy3.2_breadboard_friendly
U4
1
joystick
J1
1
LED strip
J2
1
SSD1306 SPI
J3
1
MIDI OUT Y:M5 - R:M4
J4
1
Batt
J5
1
Neck - Y:O BK:B R:3.3
J6
1
Conn_01x03_Female
J7
1
MXP5010
J8
1
1000u Ch
C1
1
100u
C2
1
0.1 ceram
C3
24
10k
R1, R2, R3, R4, R5, R6, R7, R8 +16
1
220
R25
1
10
R26
1
33
R27
2
22k
R28, R29

SAX 3 dev design files

The KiCad project lives in the tomcombriat/TES_e-sax repository on GitHub; these links point at the commit this page was built from.

SAX 3 dev: common questions

What microcontroller does the SAX 3 dev use?

The SAX 3 dev is built around the Teensy3.2_breadboard_friendly, from the NXP family.

How big is the SAX 3 dev PCB?

The SAX 3 dev measures 142.2 × 90.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SAX 3 dev?

44 components, from 18 distinct parts. The full bill of materials is listed on this page.

Where can I download the SAX 3 dev design files?

From the tomcombriat/TES_e-sax repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the SAX 3 dev design in my own project?

Yes, under the terms of its TAPR-OHL-1.0 license, which tomcombriat chose for the repository.

Can I test firmware for the SAX 3 dev 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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