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ESP32MiniDrop

stasiselectronics·ESP32MiniDrop·Hardware Files/ESP32MiniDrop.kicad_pcb

ESP32MiniDrop PCB layout, top view — open source ESP32 board by stasiselectronics
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About the ESP32MiniDrop PCB

ESP32MiniDrop is an open source ESP32 PCB design by stasiselectronics, published on GitHub under the CERN-OHL-S-2.0 license. It is a 2-layer board measuring 74 × 54 mm, with 25 components from 23 distinct parts.

Its main chip is the CP2102N-A02-GQFN28R, from the ESP32 family. Other key parts include the AZ1117CH-3.3TRG1 and ESP32-WROOM-32D. By type, the board carries 6 resistors, 5 capacitors, 4 connectors, 4 diodes, 3 ICs and 2 switches.

It belongs with the iot & wireless and usb & debug tools designs in this gallery.

From the project

ESP32 based water drop controller for photography. Controls one 12V DC Solenoid, and one DSLR Camera.

This folder contains the source files for the PCB design of the ESP32MiniDrop, along with supporting documentation. Here you can find PDFs of the schematic, an assembly drawing, and gerbers used for fabrication.

The board design is centered around the ESP32 WROOM 32D module. This has WiFi and Bluetooth included, which helps to reduce the auxillary components needed. The board has one screw terminal to attach bare wires to hook up the solenoid coil. The solenoid is controlled with a MOSFET with flyback diode attached.

ESP32MiniDrop, from the project README
From the project README

Main components on the ESP32MiniDrop

CP2102N-A02-GQFN28RAZ1117CH-3.3TRG1ESP32-WROOM-32D

ESP32MiniDrop bill of materials (BOM)

25 components, 23 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
CP2102N-A02-GQFN28R
ESP32-WROOM-32
U1
1
AZ1117CH-3.3TRG1
LTV-827S
U2
1
ESP32-WROOM-32D
AZ1117-3.3
U3
1
MMBT2222ALT1G
NMOS 60V 46A
Q1
1
1050170001
0.100" 2x4 Header
J1
1
PJ-037A
Solenoid1 Terminal
J2
1
STX-3000
AudioJack3
J3
1
1935161
Barrel_Jack_Switch
J4
1
1825027-6
SPST (BLUE)
SW1
1
1825027-8
SPST (RED)
SW2
1
SS24FL
GREEN 3.2V 20mA
D1
1
SP0502BAHTG
BLUE 3.2V 20mA
D2
1
150120GS75000
600V 5A
D3
1
150120BS75000
40V 2A
D4
1
CC0603ZRY5V9BB104
1nF 50V
C1
2
CL31A106MBHNNNE
10uF 25V 10%
C2, C5
1
CC0603ZRY5V9BB104
1uF 50V
C3
1
CC0603KRX7R9BB102
1nF 50V
C4
2
RC0603FR-0710KL
10k 5% 0.25W
R1, R2
1
RC0603FR-0722K1L
10k 5% 0.25W
R3
Show 3 more
QtyPartRefs
1
RC0603FR-0747K5L
220R 5% 0.25W
R4
1
RC0603FR-072KL
10k 5% 0.25W
R5
1
RC0603FR-0710KL
220R 5% 0.25W
R6

ESP32MiniDrop design files

The KiCad project lives in the stasiselectronics/ESP32MiniDrop repository on GitHub; these links point at the commit this page was built from.

ESP32MiniDrop: common questions

What microcontroller does the ESP32MiniDrop use?

The ESP32MiniDrop is built around the CP2102N-A02-GQFN28R, from the ESP32 family.

How big is the ESP32MiniDrop PCB?

The ESP32MiniDrop measures 74 × 54 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ESP32MiniDrop?

25 components, from 23 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 ESP32MiniDrop design files?

From the stasiselectronics/ESP32MiniDrop repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the ESP32MiniDrop design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which stasiselectronics chose for the repository.

Can I test firmware for the ESP32MiniDrop 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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