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TransimpedanceAmplifier

philipturner·home-built-stm·Models/TransimpedanceAmplifier/TransimpedanceAmplifier.kicad_pcb

TransimpedanceAmplifier PCB layout, top view — open source board by philipturner

About the TransimpedanceAmplifier PCB

TransimpedanceAmplifier is an open source PCB design by philipturner, published on GitHub. It is a 2-layer board measuring 36.5 × 42 mm, with 13 components from 11 distinct parts.

Other key parts include the LM78L15ACMX, LM79L15ACMX, LM78L05ACMX, LM79L05ACMX and AD8615AUJZ. By type, the board carries 9 ICs and 4 resistors.

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.

TransimpedanceAmplifier, from the project README
From the project README

Main components on the TransimpedanceAmplifier

LM78L15ACMXLM79L15ACMXLM78L05ACMXLM79L05ACMXAD8615AUJZOP37GSZAD8676ARMZ

TransimpedanceAmplifier bill of materials (BOM)

13 components, 11 distinct parts.

QtyPartRefs
1
LM78L15ACMX
U1
1
LM79L15ACMX
U2
2
LM78L05ACMX
U3, U5
2
LM79L05ACMX
U4, U6
1
AD8615AUJZ
U7
1
OP37GSZ
U8
1
AD8676ARMZ
U9
1
357
R1
1
806
R2
1
499
R3
1
330Meg
R4

TransimpedanceAmplifier 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.

TransimpedanceAmplifier: common questions

How big is the TransimpedanceAmplifier PCB?

The TransimpedanceAmplifier measures 36.5 × 42 mm, has 2 copper layers and is 1.6256 mm thick.

How many components are on the TransimpedanceAmplifier?

13 components, from 11 distinct parts. The full bill of materials is listed on this page.

Where can I download the TransimpedanceAmplifier 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 TransimpedanceAmplifier 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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