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LouiseLeciak·Module-elec-LilyPad·hardware/pcbs/main_pcb/main_pcb.kicad_pcb

Main PCB layout, top view — open source AVR/Arduino board by LouiseLeciak

About the Main PCB

Main is an open source AVR/Arduino PCB design by LouiseLeciak, published on GitHub. It is a 2-layer board measuring 130 × 100 mm, with 57 components from 27 distinct parts.

Its main chip is the ATmega2560-16A, from the AVR/Arduino family. Other key parts include the TXB0104D, AMS1117-3.3 and CH340C. By type, the board carries 21 capacitors, 9 resistors, 7 ICs, 7 test points, 6 connectors and 5 diodes.

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

From the project

Lily's Pad is a simple interactive and educational object primarily intended for children (5+), teachers/educational teams, and families It allows users to familiarize themselves with the alphabet and numbers in French Sign Language (FSL) or British Sign Language (BSL), as chosen.

Plug and switch the Lily's Pad on, have fun !

Lily's Pad is a simple interactive and educational object primarily intended for children, teachers/educational teams, and families

It allows users to familiarize themselves with the alphabet and numbers in French Sign Language (FSL) or British Sign Language (BSL), as chosen.

Lily's Pad is also accessible for hearing users who are curious or who have hearing-impaired loved ones they would like to communicate with.

Main, from the project README
From the project README

Main components on the Main

TXB0104DAMS1117-3.3ATmega2560-16ACH340C

Main bill of materials (BOM)

57 components, 27 distinct parts.

QtyPartRefs
3
TXB0104D
U1, U2, U3
1
AMS1117-3.3
U4
1
ATmega2560-16A
U5
1
CH340C
U6
1
~
U7
1
Crystal_GND24
Y1
2
Conn_01x07
J2, J3
1
Conn_01x13
J4
1
Conn_01x06
J5
1
Conn_01x02
J6
1
USB_C_Receptacle_USB2.0_14P
J7
1
SW_Push
SW1
1
Test Left Eye CS
TP1
1
Test Right Eye CS
TP2
1
Test DC
TP3
1
Test SD CS
TP4
1
Test Main Screen CS
TP5
2
TestPoint
TP6, TP7
5
LED
D1, D2, D3, D4, D5
16
100nF
C1, C2, C3, C4, C5, C6, C7, C8 +8
Show 7 more
QtyPartRefs
2
22uF
C10, C12
2
12pF
C13, C15
1
10uF
C19
1
100kΩ
R1
5
1kΩ
R2, R3, R5, R6, R7
1
10kΩ
R4
2
5.1kΩ
R8, R9

Main design files

The KiCad project lives in the LouiseLeciak/Module-elec-LilyPad 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 ATmega2560-16A, from the AVR/Arduino family.

How big is the Main PCB?

The Main measures 130 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Main?

57 components, from 27 distinct parts. The full bill of materials is listed on this page.

Where can I download the Main design files?

From the LouiseLeciak/Module-elec-LilyPad repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Main design in my own project?

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

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 AVR/Arduino firmware against it before you order a PCB.

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