Frontend
About the Frontend PCB
Frontend is an open source PCB design by card-io-ecg, published on GitHub. It is a 2-layer board measuring 30.5 × 21.5 mm, with 42 components from 14 distinct parts.
Other key parts include the ADS1291/2 and KC2016Z2. By type, the board carries 17 capacitors, 17 resistors, 6 transistors and 2 ICs.
From the project
Card/IO open source ECG hardware design
Card/IO is an open source, single lead ECG in a business card-like format.
The project contains two PCB designs, created using KiCAD 7:
- main_board: main/carrier board, which is a 4 layer PCB containing the MCU, display, battery and related circuitry - frontend: the ECG frontend, ADC, and touch detection/wakeup generator, implemented as a solder-on daughter board
Main components on the Frontend
Frontend bill of materials (BOM)
42 components, 14 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ADS1291/2 | ADS1291-2 | U1 |
| 1 | KC2016Z2 | KC2016Z | U2 |
| 3 | T2N7002AK,LM | SOT-23 | Q1, Q4, Q6 |
| 3 | NX3008PBK,215 | SOT-23 | Q2, Q3, Q5 |
| 3 | 100n | C_0603_1608Metric | C1, C3, C10 |
| 4 | 1u | C_0603_1608Metric | C2, C4, C7, C8 |
| 2 | 4.7n | C_0603_1608Metric | C5, C6 |
| 1 | 10u | C_0805_2012Metric | C9 |
| 6 | 100p | C_0603_1608Metric | C11, C12, C13, C14, C15, C17 |
| 1 | 1.5n | C_0603_1608Metric | C16 |
| 4 | 2k | R_0603_1608Metric | R1, R2, R5, R6 |
| 10 | 1M | R_0603_1608Metric | R3, R4, R8, R9, R10, R11, R12, R13 +2 |
| 2 | 0R | R_0603_1608Metric | R7, R15 |
| 1 | 100k | R_0603_1608Metric | R14 |
Frontend design files
The KiCad project lives in the card-io-ecg/card-io-hw repository on GitHub; these links point at the commit this page was built from.
- Layoutfrontend/frontend.kicad_pcb
- Schematicfrontend/frontend.kicad_sch
Frontend: common questions
How big is the Frontend PCB?
The Frontend measures 30.5 × 21.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Frontend?
42 components, from 14 distinct parts. The full bill of materials is listed on this page.
Where can I download the Frontend design files?
From the card-io-ecg/card-io-hw repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Frontend design in my own project?
The repository has no license, so all rights stay with card-io-ecg. Use it as a reference, and ask the author before reusing the design.
