HardLabs

Overkill nRF

sneakylizard123-4·Overkill-nRF·kicad/Overkill-nRF.kicad_pcb

Overkill nRF PCB layout, top view — open source ESP32 board by sneakylizard123-4

About the Overkill nRF PCB

Overkill nRF is an open source ESP32 PCB design by sneakylizard123-4, published on GitHub. It is a 4-layer board measuring 50 × 75 mm, with 73 components from 29 distinct parts.

Its main chip is the ESP32-S3-WROOM-1U, from the ESP32 family. Other key parts include the TPD2EUSB30 and TLV75733PDBV. By type, the board carries 17 resistors, 15 capacitors, 14 connectors, 11 diodes, 8 switches and 4 transistors.

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

From the project

A modular RF communication board designed for the Overkill system, built around the nRF24L01+ radio module instead of a bare RF IC + Amplifier. This makes the design easier to assemble, debug, and iterate while keeping it fully modular inside the Overkill ecosystem.

A modular RF communication board designed for the Overkill system, built around the nRF24L01+ radio module instead of a bare RF IC + Amplifier. This makes the design easier to assemble, debug, and iterate while keeping it fully modular inside the Overkill ecosystem.

The Overkill nRF Board handles wireless communication for the system using nRF24L01+ modules.

- Easy to assemble (no RF IC routing complexity) - Modular (plugs into Overkill ecosystem) - Hackable (all signals exposed) - Repairable (no fine-pitch RF ICs) - Hand-solderable (mostly 0805 components)

Overkill nRF, from the project README
From the project README

Main components on the Overkill nRF

ESP32-S3-WROOM-1UTPD2EUSB30TLV75733PDBV

Overkill nRF bill of materials (BOM)

73 components, 29 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-WROOM-1U
U1
1
TPD2EUSB30
U2
1
TLV75733PDBV
U3
1
AO3400A
Q1
3
GT-24-MINI
Q2, Q3, Q4
1
USB_C_RECEPTACLE_USB2.0_14P
USB_C_Receptacle_USB2.0_14P
J1
4
Conn_Coaxial
J2, J8, J10, J12
4
Conn_Coaxial
J3, J9, J11, J13
1
CONN_01X03
Conn_01x03
J4
2
CONN_01X04
Conn_01x04
J5, J6
1
MICRO_SD_CARD_DET_HIROSE_DM3AT
Micro_SD_Card_Det_Hirose_DM3AT
J7
1
CONN_01X04
Conn_01x04
J14
1
SW_SPDT
SW1
2
SW_Push
SW2, SW3
5
SW_Push
SW4, SW5, SW6, SW7, SW8
6
SS14
D1, D6, D8, D9, D10, D11
1
GREEN
D2
1
BLUE
D3
1
RED
D4
1
YELLOW
D5
Show 9 more
QtyPartRefs
1
WS2812B
D7
1
600R @ 100MHz
FB1
6
10UF
10uF
C1, C3, C5, C6, C10, C12
9
100NF
100nF
C2, C4, C7, C8, C9, C11, C13, C14 +1
2
22
R1, R2
7
10K
10k
R3, R13, R14, R15, R16, R31, R32
2
5.1K
5.1k
R4, R6
5
1k
R5, R7, R8, R9, R18
1
100K
100k
R11

Overkill nRF design files

The KiCad project lives in the sneakylizard123-4/Overkill-nRF repository on GitHub; these links point at the commit this page was built from.

Overkill nRF: common questions

What microcontroller does the Overkill nRF use?

The Overkill nRF is built around the ESP32-S3-WROOM-1U, from the ESP32 family.

How big is the Overkill nRF PCB?

The Overkill nRF measures 50 × 75 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Overkill nRF?

73 components, from 29 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 Overkill nRF design files?

From the sneakylizard123-4/Overkill-nRF 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 Overkill nRF design in my own project?

The repository has no license, so all rights stay with sneakylizard123-4. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Overkill nRF 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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