HardLabs

NO2C

MIsfitMatty·SpeedyBoards·NO2C/vD1/NO2C.kicad_pcb

NO2C PCB layout, top view — open source AVR/Arduino board by MIsfitMatty

About the NO2C PCB

NO2C is an open source AVR/Arduino PCB design by MIsfitMatty, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 99.4 × 53.7 mm, with 78 components from 40 distinct parts.

Its main chip is the ARDUINO_MEGA_SHIELD, from the AVR/Arduino family. Other key parts include the TC4424EPA, SP721, Dual VR C, LM2940T-5.0 and ERZ. By type, the board carries 21 capacitors, 21 resistors, 8 ICs, 7 transistors, 6 jumpers and 6 diodes.

It belongs with the usb & debug tools designs in this gallery.

From the project

The reset button was added as the only reset connection made to the microcontroller to prevent unwanted resets from USB connected devices. There is a caveat to this arrangement though. While the first time a firmware is loaded it will go on without intervention, subsequent times

The reset button was added as the only reset connection made to the microcontroller to prevent unwanted resets from USB connected devices. There is a caveat to this arrangement though. While the first time a firmware is loaded it will go on without intervention, subsequent times will require the user to hold the reset button down then release the button when the program starts the upload process. If the upload does not start right away go back and try again.

Main components on the NO2C

TC4424EPASP721Dual VR CLM2940T-5.0ERZMPX4250ADIL8

NO2C bill of materials (BOM)

78 components, 40 distinct parts.

QtyPartRefs
1
TC4424EPA
IC1
1
SP721
IC2
1
Dual VR C
IC3
1
CONN_02X08
IC4
1
LM2940T-5.0
U1
1
ERZ
U2
1
MPX4250A
U3
1
DIL8
U4
6
STP62NS04Z
Q1, Q2, Q3, Q4, Q5, Q6
1
2n6517
Q7
1
CONN_02X12
P1
1
CONN_01X04
P2
2
CONN_01X04
P3, P4
1
ING-VLT
JP1
2
NA
JP2, JP3
3
NA
JP4, JP5, JP6
1
ARDUINO_MEGA_SHIELD
SHIELD1
4
RED
LED1, LED2, LED3, LED4
2
1N4004
D1, D2
3
1N5818
D3, D5, D6
Show 20 more
QtyPartRefs
1
1N5919BG
D4
2
1u
C1, C18
7
u1
C2, C5, C6, C8, C12, C15, C19
6
u22
C3, C9, C13, C14, C16, C20
1
10u
C4
1
47u
C7
2
u01
C11, C17
1
u33
C21
1
47p
C22
4
2k
R1, R2, R4, R6
2
47 2w
R3, R5
2
2k49
R7, R9
1
56
R8
1
3k9
R10
3
1k
R11, R13, R15
1
10k
R12
1
51k
R14
3
1k
RN1, RN4, RN6
2
470
RN2, RN5
1
100k
RN3

NO2C design files

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

NO2C: common questions

What microcontroller does the NO2C use?

The NO2C is built around the ARDUINO_MEGA_SHIELD, from the AVR/Arduino family.

How big is the NO2C PCB?

The NO2C measures 99.4 × 53.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the NO2C?

78 components, from 40 distinct parts. The full bill of materials is listed on this page.

Where can I download the NO2C design files?

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

Can I use the NO2C design in my own project?

Yes, under the terms of its GPL-2.0 license, which MIsfitMatty chose for the repository.

Can I test firmware for the NO2C without the hardware?

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

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