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Capstone 1

colektamu·ECEN404-2026SP-TIAmplifier·Microcontroller - Jonathan Roman/PCB iterations/capstone_1/capstone_1.kicad_pcb

Capstone 1 PCB layout, top view — open source ESP32 board by colektamu
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About the Capstone 1 PCB

Capstone 1 is an open source ESP32 PCB design by colektamu, published on GitHub. It is a 2-layer board measuring 49 × 44.5 mm, with 14 components from 10 distinct parts.

Its main chip is the OPA1656ID, from the ESP32 family. By type, the board carries 5 capacitors, 4 connectors, 2 switches, 2 resistors and 1 IC.

It belongs with the audio designs in this gallery.

From the project

Files from 403 and 404

The 2025-2026 TI Amplifier Capstone Project was a senior year capstone project under Texas A&M University and sponsored by Texas Instruments. The project was completed by Haotian Guan, Cole Keating, Braeden Murdock, and Jonathan Roman under the mentorship and supervision of Alex Anderson as a contact with Texas Instruments. The files included in this GitHub repository reflect the progress updates and final version of the project.

Main components on the Capstone 1

OPA1656ID

Capstone 1 bill of materials (BOM)

14 components, 10 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
OPA1656ID
ESP32-H2-MINI-1-H2
U1
2
691137710002
J1, J2
2
691137710008
J3, J4
2
TS02-66-43-BK-100-LCR-D
S1, S2
1
1uF
C1
1
100NF
10uF
C2
1
2.2NF
0.1uF
C3
1
22PF
0.1uF
C4
1
0.1uF
C5
2
100K
10kΩ
R1, R2

Capstone 1 design files

The KiCad project lives in the colektamu/ECEN404-2026SP-TIAmplifier repository on GitHub; these links point at the commit this page was built from.

Capstone 1: common questions

What microcontroller does the Capstone 1 use?

The Capstone 1 is built around the OPA1656ID, from the ESP32 family.

How big is the Capstone 1 PCB?

The Capstone 1 measures 49 × 44.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Capstone 1?

14 components, from 10 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 Capstone 1 design files?

From the colektamu/ECEN404-2026SP-TIAmplifier repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Capstone 1 design in my own project?

The repository has no license, so all rights stay with colektamu. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Capstone 1 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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