HardLabs

Boomslang

profdc9·Boomslang·Boomslang/Boomslang.kicad_pcb

Boomslang PCB layout, top view — open source ESP32 board by profdc9
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About the Boomslang PCB

Boomslang is an open source ESP32 PCB design by profdc9, published on GitHub under the MIT license. It is a 2-layer board measuring 100 × 100 mm, with 109 components from 30 distinct parts.

Its main chip is the ESP32-S3, from the ESP32 family. Other key parts include the L7805. By type, the board carries 53 resistors, 20 transistors, 16 capacitors, 11 diodes, 7 connectors and 1 IC.

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

From the project

A microcontroller-based model rocket launcher igniter.

A 3-channel ESP32-S3 pyrotechnic/model-rocket ignition controller. Hardware (KiCad project, schematic, gerbers) is under Boomslang/; firmware is under firmware/ (PlatformIO, Arduino framework).

This project fires pyrotechnic devices and/or model rocket motors. Incorrect wiring, misconfiguration, a firmware bug, a hardware fault, or plain operator error can cause unintended ignition, fire, injury, or property damage. This is a hobbyist project, provided AS-IS, with NO WARRANTY OF ANY KIND — express or implied, including no warranty of merchantability, fitness for a particular purpose, or that…

Main components on the Boomslang

L7805

Boomslang bill of materials (BOM)

109 components, 30 distinct parts.

QtyPartRefs
1
L7805
U1
3
IRLZ44N
Q1, Q11, Q17
12
2N3904
Q2, Q4, Q5, Q6, Q7, Q8, Q10, Q12 +4
3
2N3906
Q3, Q9, Q15
2
2N2222A
Q19, Q20
3
Screw_Terminal_01x04
J1, J2, J3
1
01x04
J4
2
Screw_Terminal_01x02
J5, J6
1
Conn_01x04_Pin
J7
1
~
DB1
1
LED
D1
2
1N4007
D2, D3
4
RED LED
D4, D5, D6, D7
3
WHITE/BLUE LED
D8, D9, D10
1
1N4148
D11
2
100 uF
C1, C2
3
100 nF
C3, C4, C5
5
100 pF
C6, C7, C8, C9, C13
3
NC
C10, C11, C12
3
220 nF
C14, C15, C16
Show 10 more
QtyPartRefs
3
0.05
R1, R17, R31
12
1k
R2, R5, R9, R10, R14, R16, R18, R27 +4
3
2k2
R3, R11, R24
3
4k7
R4, R13, R26
3
100R
R6, R15, R28
8
100k
R7, R12, R25, R45, R46, R47, R48, R50
16
10k
R8, R19, R20, R21, R22, R23, R29, R33 +8
1
220R
R42
1
100R
R44
3
2R2
R51, R52, R53

Boomslang design files

The KiCad project lives in the profdc9/Boomslang repository on GitHub; these links point at the commit this page was built from.

Boomslang: common questions

What microcontroller does the Boomslang use?

The Boomslang is built around the ESP32-S3, from the ESP32 family.

How big is the Boomslang PCB?

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

How many components are on the Boomslang?

109 components, from 30 distinct parts. The full bill of materials is listed on this page.

Where can I download the Boomslang design files?

From the profdc9/Boomslang repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Boomslang design in my own project?

Yes, under the terms of its MIT license, which profdc9 chose for the repository.

Can I test firmware for the Boomslang 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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