HardLabs

4-layer panel

bfrigon·alarm-clock-v3·fab-files/pcb-panels/4-layer-panel/panel.kicad_pcb

4-layer panel PCB layout, top view — open source AVR/Arduino board by bfrigon

About the 4-layer panel PCB

4-layer panel 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 × 91.4 mm, with 90 components from 37 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 34 capacitors, 24 resistors, 10 connectors, 7 ICs, 6 inductors and 2 crystals.

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

From the project

Alarm clock (v3)

- Arduino based design using the ATMEGA2560 MCU. - Plays MP3/WAV files from a SD card. - WiFi connectivity (802.11 b/g/n) - Automatic clock synchronization using NTP - Send alarm state to Home Assistant via MQTT - Large RGB seven segment display - 16x2 character LCD display - Night lamp - Touch keypad - 24h battery backup

Home Assistant -------------- The clock can send the alarm switch state and next alarm timestamp to Home Assistant via MQTT. This allows to run home automations based on the alarm time. It also sends other data such as WiFi signal strength, power state, battery voltage and…

4-layer panel, from the project README
From the project README

Main components on the 4-layer panel

ATMEGA2560-16AUDS3231MZATMEGA16U2-AUATWINC1500-MR210PBCD74HC4050PWRAP2112K-3.3

4-layer panel bill of materials (BOM)

90 components, 37 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 17 more
QtyPartRefs
1
RESET
SW1
2
CD1206-S01575
D1, D2
2
2508053007Y0
L1, L2
4
MPZ1608S221A
L3, L4, L5, L6
4
20pF
C1, C2, C7, C8
15
100nF
C3, C5, C6, C9, C10, C11, C14, C22 +7
3
1uF
C4, C19, C20
1
22pF
C12
1
1uF
C13
1
10nF
C15
5
10uF
C16, C17, C18, C21, C28
4
1nF
C31, C32, C33, C34
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

4-layer panel 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.

4-layer panel: common questions

What microcontroller does the 4-layer panel use?

The 4-layer panel is built around the ATMEGA2560-16AU, from the AVR/Arduino family.

How big is the 4-layer panel PCB?

The 4-layer panel measures 99.1 × 91.4 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 4-layer panel?

90 components, from 37 distinct parts. The full bill of materials is listed on this page.

Where can I download the 4-layer panel 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 4-layer panel 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 4-layer panel 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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