HardLabs

Business card

roepkefeller·business-card-pcb·hardware/pcb/business-card-pcb/business-card-pcb.kicad_pcb

Business card PCB layout, top view — open source AVR/Arduino board by roepkefeller
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About the Business card PCB

Business card is an open source AVR/Arduino PCB design by roepkefeller, published on GitHub. It is a 2-layer board measuring 85.6 × 54 mm, with 50 components from 23 distinct parts.

Its main chip is the ATTINY1616, from the AVR/Arduino family. Other key parts include the MAX30102, TPS61221, XC6206P18 and NT3H2111. By type, the board carries 15 resistors, 12 capacitors, 11 diodes, 5 ICs, 2 connectors and 2 inductors.

It belongs with the sensors and test & measurement designs in this gallery.

From the project

A PCB business card that shows you your own pulse. Optical PPG sensor drives a ten-LED heart; NFC tag serves the vCard with the card switched off. ATtiny1616, MAX30102, CR2032. KiCad sources, firmware and power measurements.

This is my business card. You put a finger on it and it shows you your own pulse.

I do biomedical instrumentation — near-infrared light through tissue, mostly fNIRS. Handing someone a piece of paper felt like a missed opportunity to just show them what that means. So the card has an optical pulse sensor on the front. It lights your fingertip up red at 660 nm, measures at 880 nm in the infrared where you can't see it, and beats a ten-LED heart in time with your own.

Business card, from the project README
From the project README

Main components on the Business card

ATTINY1616MAX30102TPS61221XC6206P18NT3H2111

Business card bill of materials (BOM)

50 components, 23 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ATTINY1616
ATtiny1616
U1
1
MAX30102
U2
1
TPS61221
U3
1
XC6206P18
U4
1
NT3H2111
U5
1
UPDI Port
J1
1
U.FL Connector
J2
1
Antenna_Loop
AE1
1
BAT-HLD-001
BT1
1
PCM12
SW1
10
LED 0603 red
D1, D2, D3, D4, D5, D6, D7, D8 +2
1
LED 0603 green
D11
1
1k@100MHz
FB1
1
4.7µ/1.4A
L1
4
10µ/10V
C1, C2, C8, C9
2
1µ/10V
C3, C4
1
4.7µ/10V
C5
3
100N/10V
100n/10V
C6, C7, C10
1
100N/10V
100n/10V
C11
1
100µ/10V
C13
Show 3 more
QtyPartRefs
11
1k/1%
R1, R2, R3, R4, R5, R6, R7, R8 +3
3
4.7k/1%
R12, R13, R14
1
10k/1%
R15

Business card design files

The KiCad project lives in the roepkefeller/business-card-pcb repository on GitHub; these links point at the commit this page was built from.

Business card: common questions

What microcontroller does the Business card use?

The Business card is built around the ATTINY1616, from the AVR/Arduino family.

How big is the Business card PCB?

The Business card measures 85.6 × 54 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Business card?

50 components, from 23 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 Business card design files?

From the roepkefeller/business-card-pcb 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 Business card design in my own project?

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

Can I test firmware for the Business card 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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