HardLabs

LCD7th

danfei·LCD7th·hardware/LCD7th.kicad_pcb

LCD7th PCB layout, top view — open source AVR/Arduino board by danfei

About the LCD7th PCB

LCD7th is an open source AVR/Arduino PCB design by danfei, published on GitHub under the LGPL-3.0 license. It is a 2-layer board measuring 48 × 100 mm, with 58 components from 36 distinct parts.

Its main chip is the ATmega32U4-AU, from the AVR/Arduino family. Other key parts include the MCP73831 and MIC5219. By type, the board carries 21 capacitors, 10 resistors, 8 connectors, 7 switches, 4 diodes and 3 ICs.

From the project

LCD7th ============ It is an Arduino compatible board.

LCD7th ============ It is an Arduino compatible board.

[schem]:https://github.com/danfei/LCD7th/blob/master/hardware/LCD7th.pdf [bom]:https://github.com/danfei/LCD7th/blob/master/hardware/manufature/LCD7th.csv

LCD7th, from the project README
From the project README

Main components on the LCD7th

MCP73831MIC5219ATmega32U4-AU

LCD7th bill of materials (BOM)

58 components, 36 distinct parts.

QtyPartRefs
1
MCP73831
U1
1
MIC5219
U2
1
ATmega32U4-AU
U3
1
16MHz
X1
1
USB_B
P1
1
BATT
P2
1
ICSP
P3
1
UART
P4
1
I2C
P5
1
5VCONN
P6
1
BATT
P7
1
BATT
P8
1
JYG-12864K8G(R)-VC
LCD1
1
SPEAKER
SP1
1
SW1
SW1
1
SW2
SW2
1
SW3
SW3
1
SW4
SW4
1
SW_POWER
SW5
1
SW_RESET
SW6
Show 16 more
QtyPartRefs
1
BG_POWER
SW7
1
RED
LED1
1
GREEN
LED2
1
M7
D1
2
LED
D2, D3
1
LED
D4
3
0.1uF
C1, C2, C3
3
4.7uF
C4, C5, C6
2
22P
C7, C8
11
1uF
C9, C11, C12, C13, C14, C15, C16, C17 +3
1
470PF
C10
1
100nF
C21
3
1K
R1, R10, R12
2
22R
R2, R3
2
10K
R4, R5
3
330R
R6, R7, R9

LCD7th design files

The KiCad project lives in the danfei/LCD7th repository on GitHub; these links point at the commit this page was built from.

LCD7th: common questions

What microcontroller does the LCD7th use?

The LCD7th is built around the ATmega32U4-AU, from the AVR/Arduino family.

How big is the LCD7th PCB?

The LCD7th measures 48 × 100 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the LCD7th?

58 components, from 36 distinct parts. The full bill of materials is listed on this page.

Where can I download the LCD7th design files?

From the danfei/LCD7th repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the LCD7th design in my own project?

Yes, under the terms of its LGPL-3.0 license, which danfei chose for the repository.

Can I test firmware for the LCD7th 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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