Opentdcs
About the Opentdcs PCB
Opentdcs is an open source PCB design by nathanfu88, published on GitHub under the Custom license license. It is a board, with 24 components from 16 distinct parts.
Other key parts include the LM334M, LM7805_TO220 and ADS1115IDGS. By type, the board carries 11 resistors, 3 ICs, 2 transistors, 2 capacitors and 1 connector.
From the project
Hardware and software for low-intensity transcranial direct current stimulation (tDCS)
KiCad schematic file for the opentDCS hardware. PCB file is not confirmed nor validated yet.
- opentDCS.kicadsch: Current control circuit schematic file. The ESP32 block is not shown in the schematic. Named pins in the schematic connect to the designated ESP32 pins. - power.kicadsch: Power circuit schematic file. 2BMS charger circuit is not shown in the schematic, nor is the DC boost unit (MT3608). Connect the named pins in the schematic to the respective circuit.
Main components on the Opentdcs
Opentdcs bill of materials (BOM)
24 components, 16 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM334M | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | LM7805_TO220 | TO-220-3_Vertical | U2 |
| 1 | ADS1115IDGS | TSSOP-10_3x3mm_P0.5mm | U3 |
| 1 | 2N3904 | TO-92_Inline | Q5 |
| 1 | FQP27P06 | TO-220-3_Vertical | Q7 |
| 1 | Jack-DC | J1 | |
| 1 | 1k | Rdac1 | |
| 1 | 27 | Rset1 | |
| 1 | 327 | Rshunt1 | |
| 2 | 3.7 | V5, V6 | |
| 1 | 1u | C1 | |
| 1 | 10u | C2 | |
| 3 | 39k | R1, R3, R12 | |
| 4 | 10k | R2, R4, R14, R19 | |
| 3 | 100k | R13, R15, R17 | |
| 1 | 4.7k | R20 |
Opentdcs design files
The KiCad project lives in the nathanfu88/opentdcs repository on GitHub; these links point at the commit this page was built from.
- Schematickicad/opentDCS.kicad_sch
Opentdcs: common questions
How many components are on the Opentdcs?
24 components, from 16 distinct parts. The full bill of materials is listed on this page.
Where can I download the Opentdcs design files?
From the nathanfu88/opentdcs repository on GitHub, which has the schematic; the links under Design files point to each one.
Can I use the Opentdcs design in my own project?
It is published under Custom license, which limits how it may be reused; read the license before building on it.