HardLabs

Laserharp

Leonrts·Laserharp·hardware/laser_harp.kicad_pcb

This repository ships a schematic but no board layout.
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About the Laserharp PCB

Laserharp is an open source ESP32 PCB design by Leonrts, published on GitHub. It is a 2-layer board, with 4 components from 4 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the MCP4922-E/SL.

It belongs with the iot & wireless designs in this gallery.

From the project

Creating a Module that can be connected to any RGB Laser Show Projector via the ILDA Standard to use it as a laserharp. Configuration works via a Webinterface that is hosted locally on the esp32 and can be accessed via the esp32s access point and captive Portal.

This project implements a frameless Laser Harp controller using the ESP32-S3. It drives an ILDA-compliant laser projector and detects hand interruptions using a photodiode, generating MIDI notes over Bluetooth LE.

Navigate to Laser Harp Configuration** to enable Simulation Mode or change WiFi settings. 3. Build:

1. Open hardware/laserharp.kicadpro in KiCad 7.0+. 2. Open the PCB Editor (.kicadpcb). 3. Route the Board: You must manually draw the copper tracks connecting the components. Follow the "Ratsnest" (thin lines indicating connections). Analog Path: Keep lines from DACs to OpAmps…

Main components on the Laserharp

MCP4922-E/SLESP32-S3-WROOM-1

Laserharp bill of materials (BOM)

4 components, 4 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
MCP4922-E/SL
DAC_XY
U1
1
MCP4922-E/SL
DAC_RG
U2
1
MCP4922-E/SL
DAC_BI
U3
1
ESP32-S3-WROOM-1
ESP32-S3
U4

Laserharp design files

The KiCad project lives in the Leonrts/Laserharp repository on GitHub; these links point at the commit this page was built from.

Laserharp: common questions

What microcontroller does the Laserharp use?

The Laserharp is built around the ESP32-S3-WROOM-1, from the ESP32 family.

How big is the Laserharp PCB?

The Laserharp has 2 copper layers and is 1.6 mm thick.

How many components are on the Laserharp?

4 components, from 4 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 Laserharp design files?

From the Leonrts/Laserharp 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 Laserharp design in my own project?

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

Can I test firmware for the Laserharp 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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