HardLabs

Caligula

ahsanu123·caligula·hardware/prototype/caligula.kicad_pcb

Caligula PCB layout, top view — open source ESP32 board by ahsanu123

About the Caligula PCB

Caligula is an open source ESP32 PCB design by ahsanu123, published on GitHub. It is a 2-layer board measuring 84.6 × 108.3 mm, with 98 components from 50 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the CH340C, TPS63001_SEPIC_3V3, ICL7660, BQ24075RGT_DPPM and ADS1115IDGS. By type, the board carries 38 resistors, 27 capacitors, 9 connectors, 8 ICs, 7 switches and 4 diodes.

It belongs with the test & measurement designs in this gallery.

From the project

👑 Caligula is long project to research and create automatic tofu coagulant machine.

Main components on the Caligula

CH340CESP32-S3-WROOM-1TPS63001_SEPIC_3V3ICL7660BQ24075RGT_DPPMADS1115IDGSMAX31865XTPOPA2197XD

Caligula bill of materials (BOM)

98 components, 50 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
CH340C
U1
1
ESP32-S3-WROOM-1
U2
1
TPS63001_SEPIC_3V3
U3
1
ICL7660
U4
1
BQ24075RGT_DPPM
U5
1
ADS1115IDGS
U6
1
MAX31865XTP
MAX31865xTP
U7
1
OPA2197XD
OPA2197xD
U8
3
SS8050
Q1, Q2, Q3
2
USB2UART
J1, J4
1
1.47 IPS LCD
J2
1
ConnBattery
J3
3
lcd jumper
J5, J6, J7
1
PH Sensor
J8
1
PT100_CONN
J9
1
TF PUSH
SHOU HAN(首韩)
Card1
1
RST
SW1
1
IN1
SW2
1
Boot
SW3
1
IN2
SW4
Show 30 more
QtyPartRefs
2
IN4
SW5, SW6
1
MST22D18G2
SHOU HAN(首韩)
SW7
1
INDICATOR
D1
1
VDD
D2
1
green
D3
1
red
D4
1
22uH 1A
L1
15
100NF
100nF
C1, C2, C3, C4, C5, C6, C7, C8 +7
1
22UF
22uF
C10
2
1UF
1uF
C11, C15
3
10UF
10uF
C13, C16, C17
1
0.1UF
0.1uF
C14
2
4.7UF
4.7uF
C22, C23
1
10uF / >5V
C26
1
10uF / >10V
C27
1
2N2F
2n2F
C28
10
1k
R1, R2, R3, R4, R7, R8, R9, R13 +2
4
5K1
R5, R6, R35, R37
4
51K
51k
R10, R26, R27, R28
7
10K
R11, R12, R23, R24, R25, R30, R33
1
100
R15
1
46.4K
R16
1
2K2
R17
1
1.13K
1.13k
R18
2
4K7
4k7
R19, R22
2
1K5
R20, R21
1
4M7
R29
1
4K5
4k5
R32
2
22 / 33
R38, R39
1
430 1%
R40

Caligula design files

The KiCad project lives in the ahsanu123/caligula repository on GitHub; these links point at the commit this page was built from.

Caligula: common questions

What microcontroller does the Caligula use?

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

How big is the Caligula PCB?

The Caligula measures 84.6 × 108.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Caligula?

98 components, from 50 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 Caligula design files?

From the ahsanu123/caligula 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 Caligula design in my own project?

The repository has no license, so all rights stay with ahsanu123. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Caligula 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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