3v3
About the 3v3 PCB
3v3 is an open source PCB design by TZeng0698, published on GitHub. It is a 2-layer board measuring 34 × 17.9 mm, with 10 components from 8 distinct parts.
Other key parts include the OPA2237 and TLV70233_SOT23-5. By type, the board carries 3 capacitors, 2 ICs, 2 connectors, 1 fuse, 1 diode and 1 inductor.
From the project
A Low-cost EEG BCI implementation with modular filtering card and ADS1298. The repo contains the PCB files and a guide to design your own(in progress).
Main components on the 3v3
3v3 bill of materials (BOM)
10 components, 8 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | OPA2237 TLV70233_SOT23-5 | SOT-23-5 | U2 |
| 1 | TLV70233_SOT23-5 | SOT-23-5 | U3 |
| 2 | Conn_01x02_Pin | JST_EH_B2B-EH-A_1x02_P2.50mm_Vertical | J4, J5 |
| 1 | Fuse | Fuse_1206_3216Metric_Pad1.42x1.75mm_HandSolder | F2 |
| 1 | LED | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 1 | 22u | L_0805_2012Metric | L3 |
| 1 | 0.1U 4.7u | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C10 |
| 2 | 0.1U 10u | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C11, C12 |
3v3 design files
The KiCad project lives in the TZeng0698/Portable-EEG-with-Modular-Pre-Filtering-for-BCI-Applications repository on GitHub; these links point at the commit this page was built from.
3v3: common questions
How big is the 3v3 PCB?
The 3v3 measures 34 × 17.9 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 3v3?
10 components, from 8 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 3v3 design files?
From the TZeng0698/Portable-EEG-with-Modular-Pre-Filtering-for-BCI-Applications repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the 3v3 design in my own project?
The repository has no license, so all rights stay with TZeng0698. Use it as a reference, and ask the author before reusing the design.
