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Heartthingv2 ecg

kermitsgonnakermicide·heartthingv2·PCB/ECG Module/heartthingv2_ecg.kicad_pcb

Heartthingv2 ecg PCB layout, top view — open source board by kermitsgonnakermicide
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About the Heartthingv2 ecg PCB

Heartthingv2 ecg is an open source PCB design by kermitsgonnakermicide, published on GitHub. It is a 2-layer board measuring 25.8 × 28.7 mm, with 30 components from 16 distinct parts.

Other key parts include the TXB0108PWR, MAX30003CTI+ and AP2112K-1.8. By type, the board carries 20 capacitors, 4 resistors, 3 ICs and 2 connectors.

It belongs with the wearables and power & battery designs in this gallery.

From the project

wearable heart monitor(v2)!

the ECG and the MCU communicate over SPI(which, in my opinion is far superior to communicating over simple analog) which opens up a whole new realm of possibilities(and complexities).

the device is tiny, just taking up 6x3 cm(can go FAR smaller) and is connected to the body via this awesome electrode belt

in terms of battery - i'm just using the cheapest thing on hand and it should(in theory) last at least a day, thanks to ttf's super optimized firmware

Heartthingv2 ecg, from the project README
From the project README

Main components on the Heartthingv2 ecg

TXB0108PWRMAX30003CTI+AP2112K-1.8

Heartthingv2 ecg bill of materials (BOM)

30 components, 16 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TXB0108PWR
TXB0108PW
Texas Instruments
U1
1
MAX30003CTI+
MAX30003CTI_
Analog Devices Inc./Maxim Integrated
U2
1
AP2112K-1.8
MSKSEMI
U3
1
Conn_01x09_Socket
J1
1
Conn_01x03_Socket
J2
1
SIT1533AC-H5-D93-32.768E
SiTime
G1
2
CC0603KRX7R9BB104
100 nF
YAGEO
C1, C2
1
0402B102K500NT
1 nF
FH (Guangdong Fenghua Advanced Tech)
C3
7
CL10A105KB8NNNC
1 uF
Samsung Electro-Mechanics
C4, C7, C13, C15, C16, C18, C20
1
1000PF
1000 pF
C5
5
GRM21BR61H106KE43L
10 uF
Murata Electronics
C6, C11, C14, C17, C19
1
0.10UF
0.10 uF
C8
2
CL05C100JB5NNNC
10 pF
Samsung Electro-Mechanics
C9, C12
1
CL05B104KO5NNNC
0.10 uF
Samsung Electro-Mechanics
C10
2
0805W8F0000T5E
0 R
UNI-ROYAL(Uniroyal Elec)
R1, R2
2
0805W8F4992T5E
49.9k
UNI-ROYAL(Uniroyal Elec)
R3, R4

Heartthingv2 ecg design files

The KiCad project lives in the kermitsgonnakermicide/heartthingv2 repository on GitHub; these links point at the commit this page was built from.

Heartthingv2 ecg: common questions

How big is the Heartthingv2 ecg PCB?

The Heartthingv2 ecg measures 25.8 × 28.7 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Heartthingv2 ecg?

30 components, from 16 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 Heartthingv2 ecg design files?

From the kermitsgonnakermicide/heartthingv2 repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Heartthingv2 ecg design in my own project?

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

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