HardLabs

Refracto Bead — Pocket Digital Abbe Refractometer

jayis1·SoC-Device-Inventions·refracto-bead/schematic/refracto_bead.kicad_pcb

Refracto Bead — Pocket Digital Abbe Refractometer PCB layout, top view — open source ESP32 board by jayis1

About the Refracto Bead — Pocket Digital Abbe Refractometer PCB

Refracto Bead — Pocket Digital Abbe Refractometer is an open source ESP32 PCB design by jayis1, published on GitHub. It is a 4-layer board measuring 85 × 54 mm, with 25 components from 23 distinct parts.

Its main chip is the ESP32-C3-MINI-1, from the ESP32 family. Other key parts include the STM32G474RET6, AD8331ARZ, LMG1210RVRT, LM5022MM and MD0100. By type, the board carries 9 ICs, 5 diodes, 4 transistors, 3 switches, 2 connectors and 1 crystal.

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

From the project

Novel SoC device designs: blueprints, schematics, firmware, and docs — a new invention every 24h.

A pocket digital Abbe refractometer for liquid identification and concentration measurement, using a critical-angle TIR shadow edge on a 256-pixel linear CCD, 4-wavelength dispersion measurement, prism-temperature correction, and on-device compound library matching.

The Refracto Bead is a credit-card-sized PCB with a small flint-glass prism on top. You place a single drop of liquid on the prism, press the button, and 4 seconds later you have:

Main components on the Refracto Bead — Pocket Digital Abbe Refractometer

STM32G474RET6ESP32-C3-MINI-1AD8331ARZLMG1210RVRTLM5022MMMD0100MAX17048G+T10TP4056TPS63020DSJR

Refracto Bead — Pocket Digital Abbe Refractometer bill of materials (BOM)

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

QtyPartRefs
1
STM32G474RET6
STM32G491RET6
STMicroelectronics
U1
1
ESP32-C3-MINI-1
Espressif
U2
1
AD8331ARZ
TSL1402R
Analog Devices
U3
1
LMG1210RVRT
SSD1306_0.96in_128x64
Texas Instruments
U4
1
LM5022MM
BME280
Texas Instruments
U5
1
MD0100
DS18B20
Microchip
U6
1
MAX17048G+T10
MCP73831
Maxim/Analog
U7
1
TP4056
AP2112-3.3
NanJing Top Power
U8
1
TPS63020DSJR
DRV8833
Texas Instruments
U9
1
SCT2H12NZ
MMBT2222A
GaN Systems
Q1
3
MMBT2222A
Q2, Q3, Q4
1
ABM8-8.000MHZ
8MHz
Abracon
Y1
1
USB-C
LEMO
J1
1
12401548E4022
Micro_SD
Amphenol
J2
1
SKQGAFE010
MEASURE
ALPS
SW1
1
SKQGAFE010
MODE
ALPS
SW2
1
SKQGAFE010
POWER
ALPS
SW3
1
TEC1-04030
TE1
1
BAT54S
LED_589nm
Nexperia
D1
1
SMAJ15A
LED_525nm
Q
D2
Show 3 more
QtyPartRefs
1
HSMS-2852
LED_470nm
Broadcom/Avago
D3
1
LED_655nm
D4
1
WS2812B
D5

Refracto Bead — Pocket Digital Abbe Refractometer design files

The KiCad project lives in the jayis1/SoC-Device-Inventions repository on GitHub; these links point at the commit this page was built from.

Refracto Bead — Pocket Digital Abbe Refractometer: common questions

What microcontroller does the Refracto Bead — Pocket Digital Abbe Refractometer use?

The Refracto Bead — Pocket Digital Abbe Refractometer is built around the ESP32-C3-MINI-1, from the ESP32 family.

How big is the Refracto Bead — Pocket Digital Abbe Refractometer PCB?

The Refracto Bead — Pocket Digital Abbe Refractometer measures 85 × 54 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Refracto Bead — Pocket Digital Abbe Refractometer?

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 Refracto Bead — Pocket Digital Abbe Refractometer design files?

From the jayis1/SoC-Device-Inventions repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Refracto Bead — Pocket Digital Abbe Refractometer design in my own project?

The repository has no license, so all rights stay with jayis1. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Refracto Bead — Pocket Digital Abbe Refractometer 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.

More boards in SoC-Device-Inventions

Similar boards