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Bottom

Hanz-Tech·midi-adapter-v3-hardware·pcb/kicad/bottom.kicad_pcb

Bottom PCB layout, top view — open source ESP32 board by Hanz-Tech

About the Bottom PCB

Bottom is an open source ESP32 PCB design by Hanz-Tech, published on GitHub. It is a 2-layer board measuring 75.3 × 71.1 mm, with 21 components from 14 distinct parts.

Its main chip is the ESP32-C3-WROOM-02-N4, from the ESP32 family. Other key parts include the SN74LVC1G07DBVR, H11L1M and AZ1117CR-3.3TRG1. By type, the board carries 7 capacitors, 7 resistors, 4 ICs, 2 diodes and 1 connector.

It belongs with the audio and wearables designs in this gallery.

From the project

Share — copy and redistribute the material in any medium or format

Share — copy and redistribute the material in any medium or format

Adapt — remix, transform, and build upon the material

________________________________________

Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.

Bottom, from the project README
From the project README

Main components on the Bottom

SN74LVC1G07DBVRH11L1MAZ1117CR-3.3TRG1ESP32-C3-WROOM-02-N4

Bottom bill of materials (BOM)

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

QtyPartRefs
1
SN74LVC1G07DBVR
Texas Instruments
U2
1
H11L1M
ON Semiconductor
U3
1
AZ1117CR-3.3TRG1
LM1117-3.3
MSKSEMI
U4
1
ESP32-C3-WROOM-02-N4
ESP32-C3-WROOM-02
ESPRESSIF
U5
1
0022232041
Molex
J99
1
1N4148W
D1
1
150080YS75000
LED
Wurth Elektronik
D2
4
0.1UF
0.1uF
YAGEO
C1, C2, C6, C8
1
1UF
1uF
YAGEO
C4
2
10UF
10uF
YAGEO
C5, C7
3
220
YAGEO
R2, R3, R7
1
470
YAGEO
R8
1
68
YAGEO
R10
2
10K
YAGEO
R12, R14

Bottom design files

The KiCad project lives in the Hanz-Tech/midi-adapter-v3-hardware repository on GitHub; these links point at the commit this page was built from.

Bottom: common questions

What microcontroller does the Bottom use?

The Bottom is built around the ESP32-C3-WROOM-02-N4, from the ESP32 family.

How big is the Bottom PCB?

The Bottom measures 75.3 × 71.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Bottom?

21 components, from 14 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 Bottom design files?

From the Hanz-Tech/midi-adapter-v3-hardware 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 Bottom design in my own project?

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

Can I test firmware for the Bottom 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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