2 layers24.1 × 36.2 mm
Esp32miniBT
asterics/esp32_mouse_keyboard
ESP32 implementation for HID over GATT Keyboard and Mouse (Bluetooth Low Energy). Including serial API for external modules (similar to Adafruit EZKey HID)
28 parts911GPL-3.0
2 layers60 × 60 mm
Shadow Link
Sameer-Kulhari/Shadow-Link3A fully custom diy transmitter module with ELRS support
- Size
- 60 × 60 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 11
- Nets
- 40
- Pads
- 104
- Tracks, vias
- 260, 35
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 9 Jul 2025
- Updated
- 17 Jul 2025
Overview
Shadow Link is an open-source printed circuit board by Sameer-Kulhari, from the Sameer-Kulhari/Shadow-Link repository on GitHub. It is a 2-layer board of 60 × 60 mm with 11 parts on 40 nets, routed with 260 tracks and 35 vias.
It is built around the ESP32-WROOM-32. Its parts include 4 connectors, 2 ICs, 1 capacitor, 1 resistor and 1 diode. It belongs with the ESP32 boards of this library.
Main components
1README
README.mdShadow-Link
A diy high performance Transmitter Module with ELRS support and custom hardware which can transmit data using Sx1280 RF module and ESP-32. This Transmitter module works on a open source Firmware called ELRS ,which is used in high end transmitters and recievers
Features :
- 15km + range (LOS)
- 5ms latency
- Oled and RGB
- External Antenna
- ELRS support
- Custom case and Pcb
- Works on Uart
- Works with any ELRS reciever
Purpose :
- I made this transmitter module for my future projects in which they need a device to transfer data wirelessly , for long range and quickly ,So i made this transmitter module,So I can just send data to this module via Uart and receive on other side using any ELRS reciever.
Parts Used :
- ESP-32 WROOM
- E28-2G4M27S (SX1280)
- NEOPIXEL (WS2812)
- 0.96" I2C SSD1306
- MP1584 Step Down Regulator
Images :
PCB :
CAD :
BOM :
| Supplier | Item | Price (USD) |
|---|---|---|
| Quartz Components | Oled SSD1306 | $1.60 |
| MP1584 Voltage Regulator | $0.50 | |
| RG81 Ipex to SMA | $0.50 | |
| 12 dbi Antenna | $2.10 | |
| Usb to TTl converter | $0.70 | |
| Colling Fan | $0.84 | |
| Battery | $3.26 | |
| Misc | $2.00 | |
| Shipping | $2.54 | |
| Total (Quartz Components) | $13.94 | |
| Lion Circuits | PCB | $11.54 |
| Shipping | $2.33 | |
| Total (Lion Circuits) | $13.87 | |
| SemiNest | E28-2G4M27S | $16.9 |
| ESP32-WROOM-32E-N16 | $8.85 | |
| Shipping | $2.33 | |
| Total (SemiNest) | $28.08 | |
| ---------------------- | ------------------------------------------------ | ------------- |
| Total | $55.89 |
Parts
11| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | Oled | ScottoKeebs_Components:OLED_128x64 | J1, J1 |
| 1 | C_Polarized | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C1 |
| 1 | Conn_01x03_Socket | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Horizontal | Power |
| 1 | Conn_01x05_Socket | Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Horizontal | Communication_Port |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U1 |
| 1 | Fan | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J3 |
| 1 | Neo-Pixel | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D1 |
| 1 | Power | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Horizontal | J2 |
| 1 | Resistor | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 1 | ~ | E28-2G4M27S:WIRELM-SMD_E28-2G4M2XS | U2 |
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Questions
How big is the Shadow Link PCB?
It measures 60 × 60 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Shadow Link use?
11 parts, built around the ESP32-WROOM-32. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Shadow Link KiCad files?
From the Sameer-Kulhari/Shadow-Link repository on GitHub, at the commit this page was made from: the board is PCB/ELRS/Shadow-Link.kicad_pcb and its schematic PCB/ELRS/Shadow-Link.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Shadow Link design in my own project?
Its repository states no licence, so its author keeps all rights: ask Sameer-Kulhari before reusing the design.