HermEIS IQ
About the HermEIS IQ PCB
HermEIS IQ is an open source PCB design by Adakwaboah, published on GitHub under the MIT license. It is a 4-layer board measuring 170 × 110 mm, with 177 components from 36 distinct parts.
Other key parts include the MCP3008, LTC1983ES6-3-TRMPBF, LTC6082xGN, MCP4017-xxxxLT and MCP4822. By type, the board carries 64 resistors, 49 capacitors, 31 ICs, 22 connectors, 6 diodes and 5 switches.
From the project
This repository contains code and supplementary for HermEIS, a parallel approach to multichannel electrochemical impedance spectroscopy with implications for rapid characterization of high density neural MEAs
Akwaboah, A. and Etienne-Cummings, R., 2024. HermEIS: A Parallel Multichannel Approach to Rapid Spectral Characterization of Neural MEAs. arXiv preprint arXiv:2403.07758.
Main components on the HermEIS IQ
HermEIS IQ bill of materials (BOM)
177 components, 36 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 8 | MCP3008 | SOIC-16_3.9x9.9mm_P1.27mm | U1, U2, U3, U4, U5, U6, U7, U8 |
| 1 | LTC1983ES6-3-TRMPBF | LTC1983ES6-3-TRMPBF | U9 |
| 6 | LTC6082xGN | SSOP-16_3.9x4.9mm_P0.635mm | U10, U13, U16, U18, U21, U25 |
| 8 | MCP4017-xxxxLT | SOT-363_SC-70-6 | U11, U12, U14, U15, U17, U19, U20, U22 |
| 1 | MCP4822 | SOIC-8_3.9x4.9mm_P1.27mm | U23 |
| 1 | AD7606 | LQFP-64_10x10mm_P0.5mm | U24 |
| 1 | ltc1261cs84#pbf LTC1261CS8-4#PBF | SO-8_S | U26 |
| 5 | MCP4652T-104E/UN | MCP4652T-104E&slash_UN | U27, U28, U29, U30, U31 |
| 11 | BNC_connector | CONBNC001 | J1, J2, J3, J4, J5, J6, J7, J8 +3 |
| 5 | 6-534206-6 | 6-534206-6 | J12, J17, J18, J21, J22 |
| 2 | PPTC101LFBN-RC | PPTC101LFBN-RC | J13, J15 |
| 2 | BCS-111-LM-S-TE | BCS-111-LM-S-TE | J14, J16 |
| 2 | BTE-040-02-F-D-A | BTE-040-02-F-D-A | J19, J20 |
| 2 | OS103012MU1QP1 | SW_OS103012MU1QP1 | S1, S2 |
| 1 | 8-1437565-0 | 8-1437565-0 | SW1 |
| 2 | SW_SPDT | JS102011SCQN | SW2, SW3 |
| 3 | BZX84Cxx | SOT-23 | D1, D2, D3 |
| 3 | LED | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D4, D5, D6 |
| 24 | 0.1u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4, C7, C8, C10, C11 +16 |
| 7 | 10u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5, C6, C32, C37, C44, C45, C47 |
Show 16 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 1u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C9, C34, C46 |
| 7 | 1p | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C13, C17, C18, C22, C26, C27, C31 |
| 2 | 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C35, C36 |
| 2 | 130p | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C38, C39 |
| 2 | 75p | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C40, C41 |
| 1 | 100p | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C48 |
| 1 | 3.3u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C49 |
| 8 | 5R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4, R6, R7, R8, R9 |
| 1 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 41 | 100k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10, R14, R15, R16, R17, R18, R19, R20 +33 |
| 1 | 73k2 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11 |
| 1 | 50k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12 |
| 1 | 11k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R13 |
| 4 | 3k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R49, R50, R51, R52 |
| 4 | 4k7 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R58, R59, R64, R65 |
| 3 | 65R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R60, R61, R62 |
HermEIS IQ design files
The KiCad project lives in the Adakwaboah/HermEIS_IQ repository on GitHub; these links point at the commit this page was built from.
- LayoutPCB/HermEIS.kicad_pcb
- SchematicPCB/HermEIS.kicad_sch
- BOMPCB/HermEIS_BOM.csv
HermEIS IQ: common questions
How big is the HermEIS IQ PCB?
The HermEIS IQ measures 170 × 110 mm, has 4 copper layers and is 4.69 mm thick.
How many components are on the HermEIS IQ?
177 components, from 36 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 HermEIS IQ design files?
From the Adakwaboah/HermEIS_IQ 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 HermEIS IQ design in my own project?
Yes, under the terms of its MIT license, which Adakwaboah chose for the repository.