HardLabs

Count

mschuldt·control_bricks·hw/count/count.kicad_pcb

Count PCB layout, top view — open source AVR/Arduino board by mschuldt

About the Count PCB

Count is an open source AVR/Arduino PCB design by mschuldt, published on GitHub. It is a 2-layer board measuring 34.3 × 77.5 mm, with 21 components from 16 distinct parts.

Its main chip is the ATmega328-AU, from the AVR/Arduino family. Other key parts include the LTC-4724JR. By type, the board carries 5 capacitors, 5 resistors, 4 switches, 3 connectors, 2 ICs and 1 crystal.

From the project

A collection of composable PCBs for building simple automation solutions.

Main components on the Count

ATmega328-AULTC-4724JR

Count bill of materials (BOM)

21 components, 16 distinct parts.

QtyPartRefs
1
ATmega328-AU
U1
1
LTC-4724JR
U2
1
Crystal
Y1
1
bootloader
J1
1
FTDI
J3
1
BUS
J5
1
resetCount
SW2
1
reset
SW3
1
NEXT
SW4
1
ID
SW6
1
DIODE
D2
1
10mf
C1
2
22pf
C2, C3
2
0.1mf
C4, C5
2
10k
R2, R4
3
1k
R5, R6, R7

Count design files

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

Count: common questions

What microcontroller does the Count use?

The Count is built around the ATmega328-AU, from the AVR/Arduino family.

How big is the Count PCB?

The Count measures 34.3 × 77.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Count?

21 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Count design files?

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

Can I use the Count design in my own project?

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

Can I test firmware for the Count 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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