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Main

root670·dance-pad·Main PCB/Main PCB.kicad_pcb

Main PCB layout, top view — open source NXP board by root670

About the Main PCB

Main is an open source NXP PCB design by root670, published on GitHub under the MIT license. It is a 2-layer board measuring 97 × 94 mm, with 15 components from 7 distinct parts.

Its main chip is the Teensy4.1, from the NXP family. Other key parts include the SN74AHCT125PW. By type, the board carries 10 connectors, 3 ICs, 1 jumper and 1 capacitor.

From the project

Dance pad using FSRs and RGB LEDs in an extruded aluminum frame.

Breakout board for a Teensy 4.1 with 4 RJ45 connectors to connect the sensors from each arrow and 5 3-pin screw terminals to connect the lights. An additional 3-pin screw terminal is available for an auxilary lighting strip.

* At least a 6A 5V DC power supply is needed to support displaying all LEDs at maximum brightness.

The LED pins for the four arrows don't allow for "parallel output" with FastLED or WS2812Serial because I didn't realize only a subset of pins support that feature. The AuxLED pin however should work with parallel output. Silkscreen labels are missing for most connectors.

Main components on the Main

Teensy4.1SN74AHCT125PW

Main bill of materials (BOM)

15 components, 7 distinct parts.

QtyPartRefs
1
Teensy4.1
U1
2
SN74AHCT125PW
U2, U3
4
RJHSE-5080
J1, J2, J3, J4
1
Conn_01x02
J5
5
Conn_01x03
J6, J7, J8, J9, J10
1
Jumper
JP1
1
1000u
C1

Main design files

The KiCad project lives in the root670/dance-pad repository on GitHub; these links point at the commit this page was built from.

Main: common questions

What microcontroller does the Main use?

The Main is built around the Teensy4.1, from the NXP family.

How big is the Main PCB?

The Main measures 97 × 94 mm, has 2 copper layers and is 1.6002 mm thick.

How many components are on the Main?

15 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the Main design files?

From the root670/dance-pad repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Main design in my own project?

Yes, under the terms of its MIT license, which root670 chose for the repository.

Can I test firmware for the Main 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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