HardLabs

Heartbeat-Logger

Utstumo·Heartbeat-Logger·Heartbeat_Logger_Hardware/Heartbeat_Logger.kicad_pcb

Heartbeat-Logger PCB layout, top view — open source Microchip SAM board by Utstumo

About the Heartbeat-Logger PCB

Heartbeat-Logger is an open source Microchip SAM PCB design by Utstumo, published on GitHub under the Custom license license. It is a 2-layer board measuring 53 × 39 mm, with 74 components from 35 distinct parts.

Its main chip is the SAMD21E17A, from the Microchip SAM family. Other key parts include the IC_MCP73831, NCP551SN33T1G, HC-06, TSV635 and INA321. By type, the board carries 30 resistors, 20 capacitors, 6 ICs, 4 transistors, 4 connectors and 2 diodes.

From the project

A small, portable device that will continuously log your ECG - the "waveform" of your heart - onto a memory card for analysis.

Main components on the Heartbeat-Logger

IC_MCP73831NCP551SN33T1GSAMD21E17AHC-06TSV635INA321

Heartbeat-Logger bill of materials (BOM)

74 components, 35 distinct parts.

QtyPartRefs
1
IC_MCP73831
IC1
1
NCP551SN33T1G
U1
1
SAMD21E17A
U2
1
HC-06
U3
1
TSV635
U4
1
INA321
U5
1
Q_NPN_BEC
Q1
1
NX3008PBKW
Q2
2
TSM2306
Q3, Q4
1
XTAL-32.768kHz-Cilindrical-SMD
X1
1
CON_HEADER_2X03-PTH
J2
1
Hirose Electric DM3AT-SF-PEJM5
J3
1
Stereo_audio_jack
P1
1
MULTICOMP MC001009
P3
1
SW_PUSH
SW1
4
TEST_1P
W1, W2, W6, W7
2
LED
D1, D2
2
BLM18PG471SN1
L1, L2
5
C
C1, C2, C11, C12, C13
1
0.1uF
C3
Show 15 more
QtyPartRefs
1
1uF
C4
2
10uF/16V
C5, C19
2
100n
C6, C20
2
6.8pF
C7, C8
5
100nF
C9, C10, C15, C16, C18
1
100pF
C14
1
3.3nF
C17
11
10k
R1, R3, R4, R5, R6, R7, R16, R17 +3
1
R
R2
6
1M
R8, R10, R12, R14, R26, R30
2
200
R9, R11
2
330
R13, R15
5
100k
R18, R19, R23, R24, R29
2
2M
R20, R21
1
390k
R25

Heartbeat-Logger design files

The KiCad project lives in the Utstumo/Heartbeat-Logger repository on GitHub; these links point at the commit this page was built from.

Heartbeat-Logger: common questions

What microcontroller does the Heartbeat-Logger use?

The Heartbeat-Logger is built around the SAMD21E17A, from the Microchip SAM family.

How big is the Heartbeat-Logger PCB?

The Heartbeat-Logger measures 53 × 39 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Heartbeat-Logger?

74 components, from 35 distinct parts. The full bill of materials is listed on this page.

Where can I download the Heartbeat-Logger design files?

From the Utstumo/Heartbeat-Logger repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Heartbeat-Logger design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Heartbeat-Logger without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Microchip SAM firmware against it before you order a PCB.

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