This kit has all the parts needed to connect to the Ethernet port on Teensy 4.1.

This kit includes an Ethernet MagJack, bare circuit board, ribbon cable assembly, 2 header pins, and a capacitor. DIY soldering is required.

Assembling The Ethernet Kit

• The first step is to solder the capacitor.
• Next solder the header pins. After soldering 1 pin, turn the board over to check if the pins are at a right angle to the board. Once 2 or more pins are soldered, fixing crooked pins is almost impossible.
• Last, solder the Magjack.
• You will also need to solder the remaining header pins to your Teensy 4.1.
• After soldering, plug the 2 boards together with the cable assembly.

Software Support:

• NativeEthernet library is included in Teensyduino 1.53. In Arduino, click File > Examples > NativeEthernet to get started.
• QNEthernet is an improved lwIP-based library by Shawn Silverman, which can be installed with the Arduino Library Manager. In Arduino, click Tools > Manage Libraries and search for "QNEthernet".

Technical Details:

Link-PP LPJ4012AHNL Datasheet

Cetus J1B121 J1B12111CCD Datasheet

PCB at OSH Park

1   Ethernet Magjack         Link-PP LPJ4012AHNL or Cetus J1B1211CCD, Digikey 1278-1052-ND

1   Ribbon Cable Assembly    (see OSH Park page for DIY parts)

2   6 pin Header, 3x2        Generic 2mm pitch pins or Digikey 1849-1000-ND

1   Capacitor, 0.1 uF        Vishay K104K15X7RF5TL2, Digikey BC1084CT-ND

1   Bare Circuit Board

An earlier version of this kit used a slightly more expensive magjack. Only a hundful of these early kits were made for beta testing.

Package Includes:

• 1 x Ethernet MagJack
• 1 x bare circuit board
• 1 x ribbon cable assembly
• 2 x header pins
• 1 x capacitor