HardLabs

Hmw01

hwreverse·PCBDesignLectures·3_21_22/Homework01_corrected/hmw01/hmw01.kicad_pcb

Hmw01 PCB layout, top view — open source AVR/Arduino board by hwreverse

About the Hmw01 PCB

Hmw01 is an open source AVR/Arduino PCB design by hwreverse, published on GitHub under the BSD-3-Clause license. It is a 2-layer board measuring 50 × 68 mm, with 43 components from 35 distinct parts.

Its main chip is the ATMEGA328P-AU, from the AVR/Arduino family. Other key parts include the CH340C, 74HC14 and 74HC00. By type, the board carries 13 capacitors, 11 resistors, 6 connectors, 5 ICs, 3 diodes and 2 switches.

From the project

PCB Design course projects

Main components on the Hmw01

ATMEGA328P-AUCH340C74HC1474HC00

Hmw01 bill of materials (BOM)

43 components, 35 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATMEGA328P-AU
uPD25608
U1
1
CH340C
PIC18F4550-IPT
U2
1
74HC14
U3
1
74HC00
U4
1
74HC14
U5
1
SS8050
Q1
1
16MHZ
4MHz
Y1
1
USB_C_RECEPTACLE_USB2.0
I2C Connector
J1
1
USB_B_Micro
J2
1
CONN_02X06_ODD_EVEN
Address Connector
J3
1
CONN_02X06_ODD_EVEN
Vibration Motor Connect
J4
1
UART Connector
J5
1
CS Connector
J6
1
Resetbutton
SW1
1
SW1
Userbutton
SW2
1
FM4004-M (flyback)
D1
1
FM4004-M
D2
1
BZ-C0805-G3-E1
D3
1
Ferrite bead
FB1
2
100NF
2.2nF
C1, C2
Show 15 more
QtyPartRefs
2
10UF
100nF
C3, C12
1
100NF
10uF
C4
1
15PF
220nF
C5
1
15PF
100nF
C6
4
100NF
100nF
C7, C9, C10, C11
1
10UF
10uF
C8
1
1UF
1uF
C13
2
4.7K
4.7k
R1, R2
1
5.1K
x
R3
1
5.1K
20k
R4
1
2.2K
5.1k
R5
3
10K
10k
R6, R7, R8
1
10K
2.4K
R9
1
100R
10k
R10
1
10K
1M
R11

Hmw01 design files

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

Hmw01: common questions

What microcontroller does the Hmw01 use?

The Hmw01 is built around the ATMEGA328P-AU, from the AVR/Arduino family.

How big is the Hmw01 PCB?

The Hmw01 measures 50 × 68 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Hmw01?

43 components, from 35 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Hmw01 design files?

From the hwreverse/PCBDesignLectures repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Hmw01 design in my own project?

Yes, under the terms of its BSD-3-Clause license, which hwreverse chose for the repository.

Can I test firmware for the Hmw01 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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