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Kbd bt adapter

GuyOnWifi·kbd-bt-adapter·CAD/KBD_BT.kicad_pcb

Kbd bt adapter PCB layout, top view — open source ESP32 board by GuyOnWifi
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About the Kbd bt adapter PCB

Kbd bt adapter is an open source ESP32 PCB design by GuyOnWifi, published on GitHub. It is a 4-layer board measuring 130 × 24.4 mm, with 37 components from 21 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the TPS63001, TPS63002 and BQ24075RGT. By type, the board carries 14 resistors, 11 capacitors, 4 ICs, 3 connectors, 2 diodes and 2 inductors.

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

From the project

Turning my wired mess into a wireless mess

A project to convert a wired keyboard into Bluetooth with the ESP32-S3

My wiring is a mess. I've loved wireless peripherals because it removes the need to wire things at all! I've also been terribly annoyed with having to haul a long wire just to plug my keyboard in at hackathons. Worse, my laptop only has USB-C ports so I always have to carry an adapter.

Build the project and add an 18650 battery into the battery holder. Connect an FTDI or ESP-Prog to the 4 header pins. Pins are mapped RX, TX, EN, BOOT. Plug it in to a keyboard. Search in the Bluetooth menu for 'ESP32 Keyboard' and pair…

Kbd bt adapter, from the project README
From the project README

Main components on the Kbd bt adapter

ESP32-S3-WROOM-1TPS63001TPS63002BQ24075RGT

Kbd bt adapter bill of materials (BOM)

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

QtyPartRefs
1
ESP32-S3-WROOM-1
U1
1
TPS63001
U2
1
TPS63002
U3
1
BQ24075RGT
U4
1
ESP32_Conn
J1
1
USB_C_Receptacle_PowerOnly_6P
J2
1
USB_C_Plug_USB2.0
P1
1
18650
BT1
1
Orange
D1
1
Blue
D2
2
2.2uH
L1, L2
2
4.7uF
C1, C5
7
10uF
C2, C4, C7, C8, C9, C10, C11
2
0.1uF
C3, C6
2
100R
R1, R2
1
56K
R3
2
5.1k
R4, R14
5
10K
R5, R6, R7, R8, R13
1
1.13k
R9
1
1.18k
R10
Show 1 more
QtyPartRefs
2
2k
R11, R12

Kbd bt adapter design files

The KiCad project lives in the GuyOnWifi/kbd-bt-adapter repository on GitHub; these links point at the commit this page was built from.

Kbd bt adapter: common questions

What microcontroller does the Kbd bt adapter use?

The Kbd bt adapter is built around the ESP32-S3-WROOM-1, from the ESP32 family.

How big is the Kbd bt adapter PCB?

The Kbd bt adapter measures 130 × 24.4 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Kbd bt adapter?

37 components, from 21 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 Kbd bt adapter design files?

From the GuyOnWifi/kbd-bt-adapter 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 Kbd bt adapter design in my own project?

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

Can I test firmware for the Kbd bt adapter 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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