HardLabs

Nlink stick

nspired-Hackers·nternet-Link·v4/hardware/kicad/nlink-stick/nlink-stick.kicad_pcb

Nlink stick PCB layout, top view — open source ESP32 board by nspired-Hackers

About the Nlink stick PCB

Nlink stick is an open source ESP32 PCB design by nspired-Hackers, published on GitHub. It is a 4-layer board measuring 60 × 12.5 mm, with 45 components from 35 distinct parts.

Its main chip is the ESP32-C3-MINI-1-N4, from the ESP32 family. Other key parts include the W25Q64JVSSIQ, CP2102N-A02-GQFN24, TLV62569DBV and USBLC6-2SC6. By type, the board carries 20 capacitors, 10 resistors, 5 ICs, 4 connectors, 2 inductors and 1 crystal.

It belongs with the iot & wireless and usb & debug tools designs in this gallery.

From the project

Wi-Fi, AI chat, and camera module for TI-Nspire calculators. Custom ESP32 PCBs + firmware. (Yes, 'nternet' is intentional, Nspire community naming.)

Turn a TI-Nspire graphing calculator into a networked handheld terminal. It adds Wi-Fi, an AI chat/tutor, a camera that reads and solves problems, and a microSD card, all through a tiny plug-in device. No calculator modification.

V4 is a ground-up rewrite of the firmware, the calculator software, the communication protocol, and the hardware, with two board designs: a full camera stick and a tiny chat-only "stealth" version.

Nlink stick, from the project README
From the project README

Main components on the Nlink stick

ESP32-C3-MINI-1-N4W25Q64JVSSIQCP2102N-A02-GQFN24TLV62569DBVUSBLC6-2SC6

Nlink stick bill of materials (BOM)

45 components, 35 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-C3-MINI-1-N4
ESP32-S3R8
U1
1
W25Q64JVSSIQ
U2
1
CP2102N-A02-GQFN24
U3
1
TLV62569DBV
U4
1
USBLC6-2SC6
U5
1
40MHz
Y1
1
mini-B male plug — see PCB-DESIGN.md options
USB_MiniB_PLUG_to_calc
J1
1
OV5640_FPC_24pin
J2
1
microSD
J3
1
PROG_PADS_TC2030
J4
1
2450AT18B100
ANT1
1
PWR_SW
SW1
1
LED_STATUS
D1
1
2.2UH
2.2uH
L1
1
0R-placeholder
L2
1
100N
100n
C1
1
4.7U
4.7u
C2
1
10U
10u
C3
1
22U
22u
C4
1
100N
22u
C5
Show 15 more
QtyPartRefs
1
100N
100u
C6
1
10U
100u
C7
3
10u
C8, C9, C20
4
100n
C10, C16, C17, C18
2
1u
C11, C19
2
12p
C12, C13
2
DNP
C14, C15
1
10k
R1
1
22.1K
453k
R2
1
47.5K
100k
R3
1
453K
4.7k
R4
1
100K
4.7k
R5
3
10K
10k
R6, R7, R9
1
470
10k
R8
1
10K
470
R10

Nlink stick design files

The KiCad project lives in the nspired-Hackers/nternet-Link repository on GitHub; these links point at the commit this page was built from.

Nlink stick: common questions

What microcontroller does the Nlink stick use?

The Nlink stick is built around the ESP32-C3-MINI-1-N4, from the ESP32 family.

How big is the Nlink stick PCB?

The Nlink stick measures 60 × 12.5 mm, has 4 copper layers and is 1 mm thick.

How many components are on the Nlink stick?

45 components, from 35 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 Nlink stick design files?

From the nspired-Hackers/nternet-Link 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 Nlink stick design in my own project?

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

Can I test firmware for the Nlink stick 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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