Raspberry bioamplifier
About the Raspberry bioamplifier PCB
Raspberry bioamplifier is an open source PCB design by martijnschouten, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 28.6 × 48.9 mm, with 91 components from 12 distinct parts.
Other key parts include the AD8618, LP5907, ADS131A4 and AD8605. By type, the board carries 58 resistors, 21 capacitors, 6 connectors, 5 ICs and 1 crystal.
From the project
A bioamplifier based on a Raspberry Pi that streams data to matlab
The PCB is designed using Kicad and it's dimensions are such that it can be ordered as a 5x5cm pcb at the big chinese PCB manufacturers.
The PCB contains an 24 bit ADC, a quad opamp for measurements and one aditional single opamp that can be used as a driven right leg. As this was a prototype, each opamp has many resistors placed around it that do not all have to be soldered. By soldering certain resistors the opamp can be configured as for example a FMG sensor or as an EMG sensor.
Main components on the Raspberry bioamplifier
Raspberry bioamplifier bill of materials (BOM)
91 components, 12 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AD8618 | SOIC-14_N | U1 |
| 2 | LP5907 | SOT-23-5_HandSoldering | U2, U3 |
| 1 | ADS131A4 | LQFP-32_5x5mm_Pitch0.5mm | U4 |
| 1 | AD8605 | SOT-23-5_HandSoldering | U5 |
| 1 | Crystal | Crystal_HC49-4H_Vertical | Y1 |
| 5 | U.FL-R-SMT(01) | HRS_U.FL-R-SMT(01) | J1, J2, J3, J4, J6 |
| 1 | CONN_02X19 | Pin_Header_Straight_2x19_Pitch2.54mm | J5 |
| 16 | C | C_0805_HandSoldering | C1, C2, C3, C4, C5, C6, C7, C8 +8 |
| 3 | 1u | C_0805_HandSoldering | C15, C16, C17 |
| 2 | 8p | C_0805_HandSoldering | C20, C21 |
| 57 | R | R_0805_HandSoldering | R1, R2, R3, R4, R5, R6, R7, R8 +49 |
| 1 | 1 | R_0805_HandSoldering | R55 |
Raspberry bioamplifier design files
The KiCad project lives in the martijnschouten/raspberry-bioamplifier repository on GitHub; these links point at the commit this page was built from.
Raspberry bioamplifier: common questions
How big is the Raspberry bioamplifier PCB?
The Raspberry bioamplifier measures 28.6 × 48.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Raspberry bioamplifier?
91 components, from 12 distinct parts. The full bill of materials is listed on this page.
Where can I download the Raspberry bioamplifier design files?
From the martijnschouten/raspberry-bioamplifier repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Raspberry bioamplifier design in my own project?
Yes, under the terms of its GPL-3.0 license, which martijnschouten chose for the repository.