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Avalanche32

AronASzucs·Avalanche32

Avalanche32 PCB layout, top view — open source ESP32 board by AronASzucs

About the Avalanche32 PCB

Avalanche32 is an open source ESP32 PCB design by AronASzucs, published on GitHub. It is a 2-layer board measuring 137 × 84 mm, with 81 components from 49 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the BQ25886RGE, AP63203WU, UCC27517DBVR, USBLC6-2SC6 and SBM-20 Geiger Mueller Tube. By type, the board carries 28 resistors, 26 capacitors, 6 ICs, 6 diodes, 4 transistors and 3 connectors.

It belongs with the displays & leds, science & space and power & battery designs in this gallery.

From the project

Handheld ESP32-S3 Geiger counter with a firmware-regulated 400 V boost, SBM-20 tube, USB-C charging and OLED display.

Handheld, battery-powered Geiger counter built around the ESP32-S3-WROOM-1 and a Soviet SBM-20 GM tube.

Status: Work in progress. The perfboard prototype regulates the tube supply at ~370–400 V, counts background radiation with an audible click per count, and clearly picks up real radioactive sources (see Measurements). The KiCad schematic is complete and PCB layout is underway.

Main components on the Avalanche32

BQ25886RGEAP63203WUESP32-S3-WROOM-1UCC27517DBVRUSBLC6-2SC6SBM-20 Geiger Mueller Tube

Avalanche32 bill of materials (BOM)

81 components, 49 distinct parts.

QtyPartRefs
1
BQ25886RGE
U1
1
AP63203WU
U2
1
ESP32-S3-WROOM-1
U3
1
UCC27517DBVR
U4
1
USBLC6-2SC6
U5
1
SBM-20 Geiger Mueller Tube
U6
1
STN1HNK60
Q1
1
2N7002
Q3
1
AO3401A
Q4
1
MMBT3904
Q5
1
2s1p Lipo Battery Pack (8.4V-6V)
J1
1
USB_C_Receptacle_USB2.0_16P
J2
1
Conn_01x07
J5
1
Buzzer
BZ1
1
3A Polyfuse
F1
1
SW_SPDT
SW1
1
RESET
SW2
1
BOOT
SW3
2
LED
D1, D2
1
US1M
D3
Show 29 more
QtyPartRefs
3
150V Zener
D4, D5, D6
1
1uH
L1
1
3.9uH
L2
1
10mH
L3
5
22uF
C7, C10, C16, C17, C32
5
10uF
C8, C11, C15, C19, C30
1
47nF
C9
3
1uF
C12, C22, C28
1
4.7uF
C13
5
100nF
C14, C18, C20, C29, C31
1
47uF
C21
1
10uF 25V
C23
3
10nF 1kV
C24, C25, C27
1
10nF
C26
2
5.1K
R1, R2
7
10K
R3, R7, R12, R13, R21, R22, R24
1
200K
R4
1
5.76K
R5
1
383
R6
2
2.2K
R8, R9
1
1M
R10
1
330k
R11
3
100M
R14, R15, R16
1
680k
R17
1
1M
R18
1
5.1M
R19
3
100k
R20, R27, R28
1
10
R23
2
1k
R25, R26

Avalanche32 design files

The KiCad project lives in the AronASzucs/Avalanche32 repository on GitHub; these links point at the commit this page was built from.

Avalanche32: common questions

What microcontroller does the Avalanche32 use?

The Avalanche32 is built around the ESP32-S3-WROOM-1, from the ESP32 family.

How big is the Avalanche32 PCB?

The Avalanche32 measures 137 × 84 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Avalanche32?

81 components, from 49 distinct parts. The full bill of materials is listed on this page.

Where can I download the Avalanche32 design files?

From the AronASzucs/Avalanche32 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Avalanche32 design in my own project?

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

Can I test firmware for the Avalanche32 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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