HardLabs

Digital-Stethoscope

Ashley-Ann-Benoy·Digital-Stethoscope·Kicad/Esdp.kicad_pcb

Digital-Stethoscope PCB layout, top view — open source AVR/Arduino board by Ashley-Ann-Benoy

About the Digital-Stethoscope PCB

Digital-Stethoscope is an open source AVR/Arduino PCB design by Ashley-Ann-Benoy, published on GitHub. It is a 2-layer board measuring 63 × 39 mm, with 33 components from 18 distinct parts.

Its main chip is the ATMEGA328-P, from the AVR/Arduino family. Other key parts include the W25Q80DVSSIG, TL082 and LP2951-3.3_DIP. By type, the board carries 18 resistors, 6 capacitors, 4 ICs, 3 connectors and 2 diodes.

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

From the project

A digital stethoscope that amplifies, filters, and digitally processes heart sounds for enhanced diagnostics and remote monitoring.

https://people.ece.cornell.edu/land/courses/ece4760/FinalProjects/s2012/myw9gdd9/myw9gdd9/

https://circuitdigest.com/fullimage?i=circuitdiagram_mic/Wireless-Stethoscope-Circuit.png

https://www.youtube.com/watch?v=w6MbMf7Uo

https://www.youtube.com/watch?v=QSXJG3opua8&t=3s

Digital-Stethoscope, from the project README
From the project README

Main components on the Digital-Stethoscope

W25Q80DVSSIGATMEGA328-PTL082LP2951-3.3_DIP

Digital-Stethoscope bill of materials (BOM)

33 components, 18 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
W25Q80DVSSIG
IC1
1
ATMEGA328-P
ATmega328-P
U1
1
TL082
U2
1
LP2951-3.3_DIP
U3
1
CONN_01X02_PIN
Conn_01x02_Pin
J1
1
SCREW_TERMINAL_01X02
Conn_01x02_Pin
J2
1
CONN_01X09_PIN
Conn_01x09_Pin
J3
2
1N4148
D1, D2
2
100NF
100nF
C1, C3
3
10UF
10uF
C2, C5, C6
1
500PF
500pF
C4
2
3.3K
3.3k
R1, R8
1
1M
R2
2
20K
20k
R4, R5
2
1k
R6, R7
5
10K
10k
R9, R10, R11, R12, R13
3
200
R14, R16, R18
3
100
R15, R17, R19

Digital-Stethoscope design files

The KiCad project lives in the Ashley-Ann-Benoy/Digital-Stethoscope repository on GitHub; these links point at the commit this page was built from.

Digital-Stethoscope: common questions

What microcontroller does the Digital-Stethoscope use?

The Digital-Stethoscope is built around the ATMEGA328-P, from the AVR/Arduino family.

How big is the Digital-Stethoscope PCB?

The Digital-Stethoscope measures 63 × 39 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Digital-Stethoscope?

33 components, from 18 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 Digital-Stethoscope design files?

From the Ashley-Ann-Benoy/Digital-Stethoscope 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 Digital-Stethoscope design in my own project?

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

Can I test firmware for the Digital-Stethoscope 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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