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Overlord

Nimfrodian·Overlord·other/KiCad_files/Overlord/Overlord.kicad_pcb

Overlord PCB layout, top view — open source ESP32 board by Nimfrodian

About the Overlord PCB

Overlord is an open source ESP32 PCB design by Nimfrodian, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 155.7 × 86.3 mm, with 187 components from 56 distinct parts.

Its main chip is the ESP32S3-Wroom, from the ESP32 family. Other key parts include the 74HC4052D,653. By type, the board carries 59 resistors, 54 capacitors, 9 connectors, 5 diodes, 4 ICs and 3 LEDs.

From the project

Code repository for the Overlord home automation system

This GitHub repository contains the code and documentation for a home automation project based on a custom board built around the ESP32-WROOM-32D processor. The board is designed to centralize home automation and provide control for various switches, low voltage devices, relay boards, power meters, and other modules. The primary goal of this project is to create a home automation system that is running as locally as possible while also providing an interface for existing home automation systems that can in turn control it in tandem.

Main components on the Overlord

74HC4052D,653

Overlord bill of materials (BOM)

187 components, 56 distinct parts — part numbers from the project's BOM.

QtyPartRefs
4
74HC4052D,653
IC1, IC2, IC3, IC4
3
39502-1011
J1, J2, J3
1
CONN_01X12_PIN
Conn_01x12_Pin
J4
1
CONN_01X10_PIN
Conn_01x10_Pin
J5
2
CONN_01X11_PIN
Conn_01x11_Pin
J6, J7
2
Conn_01x04_Pin
J8, J9
2
PTS810SJK250SMTR LFS
BOOT1, RESET1
1
5747844-4
5788792-2
DB9_IN1
1
5747844-4
DB9_OUT1
17
CONNECTOR_CONN_01X01_MALE
Connector_Conn_01x01_Male
Dbg1, Dbg2, Dbg13, Dbg14, Dbg15, Dbg16, Dbg17, Dbg18 +9
17
Connector_Conn_01x01_Male
Dbg3, Dbg4, Dbg5, Dbg6, Dbg7, Dbg8, Dbg9, Dbg10 +9
1
Conn_01x02_Male
J_CAN120R1
1
FTSH-105-01-S-DV-K
J_JTAG1
1
FTSH-103-01-S-DV-TR
J_PROG1
1
USB_B
J_USB1
2
MAX485ESA+T
MAX485ESA+T_1, MAX485ESA+T_2
1
SN65HVD230
SN65HVD230_1
3
Terminal plug
SYM1, SYM2, SYM3
1
ESP32S3-Wroom
U_ESP32-S3-WROOM-1U-N16_1
3
LM317_SOT-223
U_LM317_1, U_LM317_2, U_LM317_3
Show 36 more
QtyPartRefs
1
TRS3232EIPWR
U_TRS3232EIPWR1
3
LED
3V3LED2, 5VLED1, 12VLED1
3
1N4148
D1, D2, D5
1
1N4148
SD0805S020S1R0
D4
1
TPD2E001DZDR
D7
42
0.1UF
0.1uF
C1, C3, C8, C9, C12, C13, C14, C15 +34
3
10UF
10uF
C2, C10, C11
3
1UF
1uF
C4, C6, C7
4
220uF
C18, C27, C36, C45
2
220UF
1uF
C54, C55
1
120
R2
1
0R
R3
2
10K
20K
R6, R21
2
10K
R7, R8
1
240
10K
R9
1
3K3
R10
1
10K
240
R11
1
680
10k
R12
1
6K8
499
R13
1
20K
147
R14
1
220
6K8
R15
1
220
20K
R16
1
220
680
R17
1
20K
220
R18
2
10K
220
R19, R20
1
3K3
10K
R22
1
6K8
10K
R23
1
20K
10K
R24
1
4.7K
3K3
R25
1
4.7K
6K8
R26
1
4.7K
20K
R27
29
4.7K
4.7k
R28, R29, R30, R31, R32, R33, R34, R35 +21
3
4.7k
R57, R58, R59
1
240
R60
1
60
R61
1
390
R62

Overlord design files

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

Overlord: common questions

What microcontroller does the Overlord use?

The Overlord is built around the ESP32S3-Wroom, from the ESP32 family.

How big is the Overlord PCB?

The Overlord measures 155.7 × 86.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Overlord?

187 components, from 56 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 Overlord design files?

From the Nimfrodian/Overlord 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 Overlord design in my own project?

Yes, under the terms of its GPL-3.0 license, which Nimfrodian chose for the repository.

Can I test firmware for the Overlord 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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