u/Acceptable-Cost4817

Hi all, I was traveling from London Euston to Edale via Manchester on Saturday.

Because overhead line damage at Manchester Piccadilly caused multiple cancellations, the 12:13 from London became so overcrowded that staff told me to take the following service, which only ran to Stockport. From there I had to switch to a CrossCountry service to reach Manchester Piccadilly. That delay caused me to miss my connection, and because the train to Edale runs only once every hour, I arrived in Edale at 16:32 instead of 15:32, so I was exactly 60 minutes late. My understanding is that this should qualify me for a 50% refund on my Off-Peak Return, yet Avanti is only offering 25% and has rejected my appeal.

I'm petty. What are my next steps to claim the rest?

Hi all, I've designed a sensor PCB to prototype a projct involving TS4231-based IR sensors.

I've used a Waveshare RP2350 Plus W board as the main controller that I soldered directly onto my custom board (the plan is to eventually do a fully custom design).

Weirdly, some of the TS4231 chips are not working properly, and it seems like this mostly are the ones positioned closer to the RP2350 Plus W board.

Here is a link to the Gerber files for the sensor board: https://www.altium.com/viewer/?token=GyteIa%2Fqc0W5UXZd%2Bu9ubbX6

This is what I have observed:

• The TS4231 all seem to behave generally fine and they repond to IR pulses as per the datasheet. However, some of the TS4231s fail when doing the final switch into the 'WATCH' state and I don't understand why.
• Also, the CYW43439 Wi-Fi module on the RP2350 Plus W board is not working reliably when the board is soldered to the sensor board (but works before soldering it to my PCB).

I have verified this using two different boards (and RP2350 modules) and they both show consistent behavior.

I suspect there might be some interference or power issues caused by the my board design. The TS4231 sensors are decoupled as per the datasheet, but I wondering if I'm intorducing some noise or power instability that is affecting the sensors and the Wi-Fi module (ground loop?).

I have a PicoScope and would really appreciate any advice on how to troubleshoot this issue!