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Bulma

eesakiii·SilverbackPCBs·Goku _ Vegeta/2.0/Bulma - GV2/Bulma.kicad_pcb

Bulma PCB layout, top view — open source ESP32 board by eesakiii

About the Bulma PCB

Bulma is an open source ESP32 PCB design by eesakiii, published on GitHub. It is a 2-layer board measuring 100 × 85 mm, with 77 components from 36 distinct parts.

Its main chip is the ESP32-DEVKITC, from the ESP32 family. Other key parts include the DRV8870DDAR, GY-521, PCA9685PW and LM1084-5.0. By type, the board carries 29 resistors, 18 connectors, 9 ICs, 9 diodes, 9 capacitors and 2 transistors.

Main components on the Bulma

DRV8870DDARESP32-DEVKITCGY-521PCA9685PWLM1084-5.0

Bulma bill of materials (BOM)

77 components, 36 distinct parts.

QtyPartRefs
5
DRV8870DDAR
U1, U2, U3, U4, U7
1
ESP32-DEVKITC
U5
1
GY-521
U6
1
PCA9685PW
U8
1
LM1084-5.0
U10
2
IRLZ44N
Q3, Q4
1
BOOST CONVERTER IN
J1
1
BOOST CONVERTER OUT
J2
1
Drive Motor 1
J3
1
Drive Motor 2
J4
1
Drive Motor 3
J5
1
Drive Motor 4
J6
1
Chi Chi Conn
J7
1
Solenoid
J8
1
2S Li-Po
J9
1
4S Li-Po
J10
1
Voltmeter 1
J11
1
Voltmeter 2
J12
1
Dribbler Motor 1
J13
1
USONIC1
J14
Show 16 more
QtyPartRefs
1
USONIC2
J15
1
USONIC3
J16
1
USONIC4
J17
1
Cam H7
J18
1
1825116-1
S1
8
LED
D1, D2, D4, D5, D6, D7, D8, D9
1
1N4004
D3
2
10UF20V
C1, C2
5
0.1UF20V
C3, C4, C5, C6, C8
1
1000U
C7
1
10UF
C9
5
200R
R1, R3, R4, R5, R6
11
220R
R2, R7, R8, R11, R12, R13, R14, R15 +3
5
10K
R9, R10, R22, R23, R24
3
150R
R18, R27, R29
5
730R
R19, R20, R21, R25, R26

Bulma design files

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

Bulma: common questions

What microcontroller does the Bulma use?

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

How big is the Bulma PCB?

The Bulma measures 100 × 85 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Bulma?

77 components, from 36 distinct parts. The full bill of materials is listed on this page.

Where can I download the Bulma 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 Bulma 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 Bulma 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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