HardLabs

Bulma2.2

eesakiii·SilverbackPCBs·Goku _ Vegeta/2.2/Bulma2.2 - GV2/Bulma2.2.kicad_pcb

Bulma2.2 PCB layout, top view — open source ESP32 board by eesakiii

About the Bulma2.2 PCB

Bulma2.2 is an open source ESP32 PCB design by eesakiii, published on GitHub. It is a 2-layer board measuring 85 × 118.3 mm, with 32 components from 28 distinct parts.

Its main chip is the ESP32-DEVKITC, from the ESP32 family. Other key parts include the DC-DC_Buck_Converter_7-24V_to_5V_4A. By type, the board carries 19 connectors, 6 test points, 3 ICs, 2 capacitors and 2 resistors.

Main components on the Bulma2.2

DC-DC_Buck_Converter_7-24V_to_5V_4AESP32-DEVKITC

Bulma2.2 bill of materials (BOM)

32 components, 28 distinct parts.

QtyPartRefs
1
DC-DC_Buck_Converter_7-24V_to_5V_4A
U1
1
MPM3610_3.3V_Buck_Converter_Breakout_-_21V_In_3.3V_Out_at_1.2A
U2
1
ESP32-DEVKITC
U5
2
B3B-XH-A(LF)(SN)
B3B-XH-A_LF__SN_
JST Sales America Inc.
J1, J2
1
Drive Motor 1
J3
1
Drive Motor 2
J4
1
Drive Motor 3
J5
1
Drive Motor 4
J6
2
XT60-M
J7, J8
1
Lipo Buzzer 1
J9
1
Lipo Buzzer 2
J10
1
Voltmeter 1
J11
1
2 x Motor Driver
J13
2
Conn_01x19_Male
J14, J17
1
IMU Breakout - BNO055
J15
1
Line PCB
J16
1
H7
J18
1
Power Switch
J19
1
Logic Switch
J20
1
TestPoint - 5V
TP1
Show 8 more
QtyPartRefs
1
TestPoint - SCL
TP2
1
TestPoint - SDA
TP3
1
TestPoint - TX
TP4
1
TestPoint - RX
TP5
1
TestPoint - GND
TP6
2
10UF
C1, C2
1
100K
R1
1
10K
R2

Bulma2.2 design files

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

Bulma2.2: common questions

What microcontroller does the Bulma2.2 use?

The Bulma2.2 is built around the ESP32-DEVKITC, from the ESP32 family.

How big is the Bulma2.2 PCB?

The Bulma2.2 measures 85 × 118.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Bulma2.2?

32 components, from 28 distinct parts. The full bill of materials is listed on this page.

Where can I download the Bulma2.2 design files?

From the eesakiii/SilverbackPCBs repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Bulma2.2 design in my own project?

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

Can I test firmware for the Bulma2.2 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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