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Opti rot

jayis1·SoC-Device-Inventions·opti-rot/schematic/opti_rot.kicad_pcb

Opti rot PCB layout, top view — open source ESP32 board by jayis1

About the Opti rot PCB

Opti rot is an open source ESP32 PCB design by jayis1, published on GitHub. It is a 2-layer board measuring 160 × 65 mm, with 34 components from 34 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 10 ICs, 8 resistors, 5 capacitors, 4 diodes, 3 switches and 2 connectors.

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

From the project

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

A pocket-sized digital polarimeter that measures the optical rotation of chiral liquids — sugar concentration, honey adulteration, essential-oil authentication, pharmaceutical enantiomeric excess, amino-acid identification, and reaction monitoring — using multi-wavelength polarized light (405/520/589 nm), a microstepping analyzer on a stepper motor, Malus's-law curve fitting, Drude optical-rotatory-dispersion analysis, a 50-compound specific-rotation library, temperature compensation, and BLE/Wi-Fi streaming — bringing $3k–$15k lab polarimeters down to ~$58 and coffee-mug size.

Main components on the Opti rot

STM32G474RET6ESP32-C3-MINI-1AD8331ARZLMG1210RVRTLM5022MMMD0100MAX17048G+T10TP4056TPS63020DSJRSSD1306-128X64-SPI

Opti rot bill of materials (BOM)

34 components, 34 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32G474RET6
STM32G491RET6
STMicroelectronics
U1
1
ESP32-C3-MINI-1
Espressif
U2
1
AD8331ARZ
TP4056
Analog Devices
U3
1
LMG1210RVRT
AP2112-3.3
Texas Instruments
U4
1
LM5022MM
LP5907MFX-3.3
Texas Instruments
U5
1
MD0100
ADP7118ARDZ-5.0
Microchip
U6
1
MAX17048G+T10
TSL257
Maxim/Analog
U7
1
TP4056
DS18B20
NanJing Top Power
U8
1
TPS63020DSJR
SSD1306 128×64 OLED
Texas Instruments
U9
1
SSD1306-128X64-SPI
ULN2003A
Solomon SSD1306
U10
1
28BYJ-48 5V
M1
1
USB-C 2.0
LEMO
J1
1
12401548E4022
MicroSD
Amphenol
J2
1
18650 3.7V 2600mAh
BT1
1
SKQGAFE010
MEAS
ALPS
SW1
1
SKQGAFE010
MODE
ALPS
SW2
1
SKQGAFE010
CAL
ALPS
SW3
1
BAT54S
589nm LED
Nexperia
D1
1
SMAJ15A
520nm LED
Q
D2
1
HSMS-2852
405nm LED
Broadcom/Avago
D3
Show 14 more
QtyPartRefs
1
RGB LED
D4
1
GRM188R71H104KA93
100nF
Murata
C1
1
GRM188R60J106ME47
10uF
Murata
C2
1
VJ0805Y473JXAAT
1uF
Vishay
C3
1
GRM188R71C105KA93
2.2uF
Murata
C4
1
GRM1885C1H220JA01
100nF
Murata
C5
1
RN73R1JTTD50R0B10
4.7k
Vishay
R1
1
RC0805FR-074K7L
4.7k
Yageo
R2
1
RC0805FR-07100KL
4.7k
Yageo
R3
1
RC0805FR-071ML
100k
Yageo
R4
1
RC0805FR-0710KL
47k
Yageo
R5
1
RC0805FR-0710KL
150R
Yageo
R6
1
150R
R7
1
100R
R8

Opti rot 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.

Opti rot: common questions

What microcontroller does the Opti rot use?

The Opti rot is built around the ESP32-C3-MINI-1, from the ESP32 family.

How big is the Opti rot PCB?

The Opti rot measures 160 × 65 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Opti rot?

34 components, from 34 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 Opti rot 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 Opti rot 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 Opti rot 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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