ResistorString
About the ResistorString PCB
ResistorString is an open source PCB design by philipturner, published on GitHub. It is a 2-layer board measuring 8 × 12.5 mm, with 4 components from 4 distinct parts.
By type, the board carries 3 resistors and 1 connector.
It belongs with the sensors designs in this gallery.
From the project
Low-cost custom-built STM, to solve a problem not addressed by commercial STMs
STM with no nonlinearities in the relationship between piezo voltage and position.
Presentation: - Video (YouTube) - Slides (PDF)
This project is officially a NANO 4994 research project for Spring 2025, worth 3 credits. After months of research, I found a potential solution to my main goal of building an STM, solving piezo creep. I discovered a new material that could make better piezoelectric actuators: lithium niobate. I am listing some of the calculations and scripts I have done. Currently, I am speed-running the tutorials for FreeCAD and KiCad. I have gotten through ~50% of them.
ResistorString bill of materials (BOM)
4 components, 4 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Conn_01x04_Pin | PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | 357 | RESC1508X50N | R1 |
| 1 | 806 | RESC1508X50N | R2 |
| 1 | 499 | RESC1508X50N | R3 |
ResistorString design files
The KiCad project lives in the philipturner/home-built-stm repository on GitHub; these links point at the commit this page was built from.
ResistorString: common questions
How big is the ResistorString PCB?
The ResistorString measures 8 × 12.5 mm, has 2 copper layers and is 1.6256 mm thick.
How many components are on the ResistorString?
4 components, from 4 distinct parts. The full bill of materials is listed on this page.
Where can I download the ResistorString design files?
From the philipturner/home-built-stm repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the ResistorString design in my own project?
The repository has no license, so all rights stay with philipturner. Use it as a reference, and ask the author before reusing the design.
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