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Isc motorbeep

ISC-HEI·isc-motorbeep·hardware/isc-motorbeep/isc-motorbeep.kicad_pcb

Isc motorbeep PCB layout, top view — open source ESP32 board by ISC-HEI
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About the Isc motorbeep PCB

Isc motorbeep is an open source ESP32 PCB design by ISC-HEI, published on GitHub. It is a 4-layer board measuring 70 × 50 mm, with 69 components from 37 distinct parts.

Its main chip is the ESP32-WROOM-32E, from the ESP32 family. Other key parts include the USBLC6-2SC6, TPS63001, CP2102N, STSPIN220 and MAX98357A. By type, the board carries 28 resistors, 18 capacitors, 7 ICs, 5 connectors, 3 transistors and 3 switches.

It belongs with the audio, robotics & motion and power & battery designs in this gallery.

From the project

ESP32 board driving two bipolar stepper motors and a speaker from 3x AA cells — a complete KiCad 9 schematic authored headlessly via MCP. ERC-clean, netlist-asserted, priced BOM.

A complete KiCad 9 schematic for an ESP32 board driving two bipolar stepper motors and a small speaker, powered from 3× AA cells. It is an improved derivative of the ESP32 DevKit DOIT v1: the AMS1117 LDO, the thin bulk capacitance, the micro-USB connector and the absent battery sensing are all addressed.

Take the ESP32 DevKit DOIT v1 as the reference design and produce an improved version of it that drives two stepper motors and a small speaker, running off AA cells — originally two, changed to three during the work. Deliver the complete schematic in KiCad (installing it as needed), authored…

Isc motorbeep, from the project README
From the project README

Main components on the Isc motorbeep

USBLC6-2SC6TPS63001ESP32-WROOM-32ECP2102NSTSPIN220MAX98357A

Isc motorbeep bill of materials (BOM)

69 components, 37 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
USBLC6-2SC6
U1
1
TPS63001
U2
1
ESP32-WROOM-32E
U3
1
CP2102N
U4
2
STSPIN220
U5, U6
1
MAX98357A
U7
1
BSS138
Q1
2
MMBT3904
Q2, Q3
1
USB-C
J1
1
GPIO header
J2
1
Stepper 1
J3
1
Stepper 2
J4
1
Speaker 4-8R
J5
1
3x AA
BT1
1
BOOT
SW1
1
RESET
SW2
1
USER
SW3
2
MBR0520
D1, D2
1
green
D3
1
2.2UH
2.2uH
L1
Show 17 more
QtyPartRefs
3
10uF
C1, C2, C3
7
100NF
100nF
C4, C10, C13, C14, C20, C22, C30
2
100UF
100uF
C5, C32
2
10UF
10uF
C11, C31
1
22UF
22uF
C12
1
4.7UF
4.7uF
C15
2
47UF
47uF
C21, C23
2
5.1K
5.1k
R1, R2
5
100K
100k
R3, R22, R31, R41, R50
1
68K
68k
R4
1
10R
R5
7
10K
10k
R10, R11, R21, R23, R24, R30, R40
1
1k
R12
4
10k
R13, R14, R15, R16
1
39K
39k
R20
2
20K
20k
R32, R42
4
0.33
R33, R34, R43, R44

Isc motorbeep design files

The KiCad project lives in the ISC-HEI/isc-motorbeep repository on GitHub; these links point at the commit this page was built from.

Isc motorbeep: common questions

What microcontroller does the Isc motorbeep use?

The Isc motorbeep is built around the ESP32-WROOM-32E, from the ESP32 family.

How big is the Isc motorbeep PCB?

The Isc motorbeep measures 70 × 50 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Isc motorbeep?

69 components, from 37 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 Isc motorbeep design files?

From the ISC-HEI/isc-motorbeep 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 Isc motorbeep design in my own project?

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

Can I test firmware for the Isc motorbeep 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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