Pico-10BASE-T

10BASE-T from Raspberry Pi Pico

Note:

• DO NOT CONNECT to PoE equipment!!
• Currently transmission only (UDP is available)
• Receiving process will be implemented in the future...
• It is advisable to insert a pulse transformer for safety.

See also :
https://github.com/kingyoPiyo/Pico-RJ45-Sock

Setup

• Raspberry Pi Pico
• 2 x 47 ohm resistor
• 1 x 470 ohm resistor
• RJ45 connector(GP16 = TX-, GP17 = TX+)

Have fun!

Ethernet Packet Example

Ethernet Physical layer waveform

Measured with 100Ω termination.

NLP(Normal Link Pulse)

Ethernet Packet overview

Preamble

TP_IDL

How to make a pulse transformer

A simple pulse transformer can be built using ferrite cores that have fallen around!
Adding a transformer ensures insulation and safe experimentation.

Pass it through the core about three times.

Just connect it into the RasPico and you're done!

The waveform after passing through the transformer.

Waveforms of commercial network devices

Physical layer signal waveforms of commercial network equipment operating at 10BASE-T.

Measured with 100Ω termination.