HardLabs

Motherboard

bfrigon·alarm-clock-v3·pcb/motherboard/motherboard.kicad_pcb

Motherboard PCB layout, top view — open source AVR/Arduino board by bfrigon

About the Motherboard PCB

Motherboard is an open source AVR/Arduino PCB design by bfrigon, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 99.1 × 39.4 mm, with 76 components from 34 distinct parts.

Its main chip is the ATMEGA2560-16AU, from the AVR/Arduino family. Other key parts include the DS3231MZ, ATMEGA16U2-AU, ATWINC1500-MR210PB, CD74HC4050PWR and AP2112K-3.3. By type, the board carries 26 capacitors, 24 resistors, 10 connectors, 7 ICs, 2 crystals and 2 diodes.

It belongs with the iot & wireless and displays & leds designs in this gallery.

From the project

Alarm clock (v3)

Main components on the Motherboard

ATMEGA2560-16AUDS3231MZATMEGA16U2-AUATWINC1500-MR210PBCD74HC4050PWRAP2112K-3.3

Motherboard bill of materials (BOM)

76 components, 34 distinct parts.

QtyPartRefs
1
ATMEGA2560-16AU
U1
1
DS3231MZ
U2
1
ATMEGA16U2-AU
U3
1
ATWINC1500-MR210PB
U4
2
CD74HC4050PWR
U5, U7
1
AP2112K-3.3
U6
1
MMST3904
Q1
2
16.00 MHz
Y1, Y2
1
-
J1
1
USB-MINI-B
J2
1
DB-B
J3
2
ICSP
J4, J7
1
Micro_SD
J5
1
PSU-SIG
J6
1
DB-A
J9
1
PSU
J10
1
DB-C
J12
1
CR1220
B1
1
SR05
DA1
1
500mA
F1
Show 14 more
QtyPartRefs
1
RESET
SW1
2
CD1206-S01575
D1, D2
4
20pF
C1, C2, C7, C8
12
100nF
C3, C5, C6, C9, C10, C11, C14, C22 +4
3
1uF
C4, C19, C20
1
22pF
C12
1
1uF
C13
1
10nF
C15
4
10uF
C16, C17, C18, C21
9
10k
R1, R2, R5, R6, R9, R11, R20, R21 +1
2
22
R3, R4
2
1M
R7, R8
8
100k
R10, R12, R13, R14, R15, R16, R17, R18
3
1k
R19, R23, R24

Motherboard design files

The KiCad project lives in the bfrigon/alarm-clock-v3 repository on GitHub; these links point at the commit this page was built from.

Motherboard: common questions

What microcontroller does the Motherboard use?

The Motherboard is built around the ATMEGA2560-16AU, from the AVR/Arduino family.

How big is the Motherboard PCB?

The Motherboard measures 99.1 × 39.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Motherboard?

76 components, from 34 distinct parts. The full bill of materials is listed on this page.

Where can I download the Motherboard design files?

From the bfrigon/alarm-clock-v3 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Motherboard design in my own project?

Yes, under the terms of its CC-BY-SA-4.0 license, which bfrigon chose for the repository.

Can I test firmware for the Motherboard 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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