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Principal V3

PCBrs·CDR-Electronique·PCB_Principal_V4/_Principal_V3.kicad_pcb

Principal V3 PCB layout, top view — open source NXP board by PCBrs

About the Principal V3 PCB

Principal V3 is an open source NXP PCB design by PCBrs, published on GitHub. It is a 2-layer board measuring 70.8 × 87.9 mm, with 74 components from 30 distinct parts.

Its main chip is the TEENSY 4.1, from the NXP family. Other key parts include the 4504, SN65HVD232 and Pololu_Breakout_DRV8825. By type, the board carries 32 resistors, 12 connectors, 10 capacitors, 8 transistors, 6 diodes and 3 ICs.

It belongs with the robotics & motion designs in this gallery.

From the project

Carte électronique pour la Coupe de France de robotique

La carte principale est basée sur une Teensy 4.1, la communication est faite par Wi-Fi via un ESP32 et la communication interne du robot via un bus CAN. Les cartes sont modulaires et spécifiques, on peut ajouter plusieurs fois le meme types de cartes il faut juste changer l'ID CAN de la carte en soft. Le microcontroleur des cartes périphériques est un STM32F302C8T6.

Main components on the Principal V3

4504SN65HVD232TEENSY 4.1Pololu_Breakout_DRV8825

Principal V3 bill of materials (BOM)

74 components, 30 distinct parts.

QtyPartRefs
1
4504
U1
1
SN65HVD232
U2
1
TEENSY 4.1
U3
2
Pololu_Breakout_DRV8825
A1, A2
6
SI2302S
Q1, Q2, Q3, Q4, Q5, Q6
2
Q_NPN_BEC
Q7, Q8
2
CAN
J1, J4
1
ENCODEUR_G
J2
1
ENCODEUR_D
J3
1
MOTOR_D
J5
1
BATT
J6
1
MOTOR_G
J7
2
FAN
J8, J9
1
UART
J10
1
I2C
J11
1
NEXTION
J12
1
120
JP1
3
LED
D1, D2, D3
1
TVS
D4
2
1N4148W
D5, D6
Show 10 more
QtyPartRefs
1
10u
C1
6
100n
C2, C3, C4, C6, C9, C11
2
47u
C5, C7
1
10u
C12
3
4.7k
R1, R17, R18
1
560
R2
1
220
R3
12
0
R4, R5, R6, R7, R8, R9, R10, R11 +4
1
120
R16
14
10k
R19, R20, R21, R22, R23, R24, R25, R26 +6

Principal V3 design files

The KiCad project lives in the PCBrs/CDR-Electronique repository on GitHub; these links point at the commit this page was built from.

Principal V3: common questions

What microcontroller does the Principal V3 use?

The Principal V3 is built around the TEENSY 4.1, from the NXP family.

How big is the Principal V3 PCB?

The Principal V3 measures 70.8 × 87.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Principal V3?

74 components, from 30 distinct parts. The full bill of materials is listed on this page.

Where can I download the Principal V3 design files?

From the PCBrs/CDR-Electronique repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Principal V3 design in my own project?

The repository has no license, so all rights stay with PCBrs. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Principal V3 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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