Digital-Stethoscope
About the Digital-Stethoscope PCB
Digital-Stethoscope is an open source PCB design by darknight2163, published on GitHub. It is a 2-layer board measuring 113.1 × 41.3 mm, with 30 components from 21 distinct parts.
Other key parts include the LM741 and TL082. By type, the board carries 15 resistors, 5 ICs, 5 capacitors, 3 connectors and 1 diode.
It belongs with the iot & wireless and audio designs in this gallery.
From the project
Digital stethoscope built from scratch: custom PCB amplifies and filters heart sound signals, streams audio over Bluetooth to a companion app for real-time auscultation.
Main components on the Digital-Stethoscope
Digital-Stethoscope bill of materials (BOM)
30 components, 21 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | LM741 | DIP-8_W10.16mm | U1, U3, U4, U5 |
| 1 | TL082 | DIP-8_W10.16mm | U2 |
| 2 | Conn_01x02_Male | PinHeader_1x02_P2.54mm_Vertical | J1, J3 |
| 1 | Screw_Terminal_01x03 | TerminalBlock_Phoenix_MKDS-1,5-3_1x03_P5.00mm_Horizontal | J2 |
| 1 | 10K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | RL1 |
| 1 | LED_Dual_Bidirectional | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | 470uF | CP_Elec_8x11.9 | C1 |
| 1 | 47nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2 |
| 2 | 10nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C4 |
| 1 | 100nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | 10K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 3 | 2.2K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R3, R9 |
| 1 | 47K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | 33K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 152K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 3 | 300K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7, R8, R15 |
| 1 | 4.7K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10 |
| 1 | 5K | Potentiometer_Bourns_3386P_Vertical | R11 |
| 1 | 330K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12 |
| 1 | 1K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R13 |
Show 1 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 3.9Ohm | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R14 |
Digital-Stethoscope design files
The KiCad project lives in the darknight2163/Digital-Stethoscope repository on GitHub; these links point at the commit this page was built from.
- LayoutPCB design/EDL.kicad_pcb
- SchematicPCB design/EDL.kicad_sch
- BOMEDL_BOM.xlsx
Digital-Stethoscope: common questions
How big is the Digital-Stethoscope PCB?
The Digital-Stethoscope measures 113.1 × 41.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Digital-Stethoscope?
30 components, from 21 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 darknight2163/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 darknight2163. Use it as a reference, and ask the author before reusing the design.
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