PaulS

Could it be that your Ethernet infrastructure at home takes some time to get fully operational after a power outage? I wouldn't be surprised that all your Teensy's do actually power-up correctly but are timing out on the first QNEthernet call...

A more robust polyfuse that's 0603 might be 0603L075SLYR which has a 750mA hold current at 20C. It has a much lower max resistance after tripping too. https://www.digikey.co.uk/en/products/detail/littelfuse-inc/0603L075SLYR/3661955

This schematic works for me, although adding a 4.7k-10k resistor to ground from pin 7 (based on this suggestion) seems to improve the rise time of the output signal. without the resistor: with the resistor:

Well, you may want to elaborate on what you exactly want. Are you looking into connecting the VU meters to your DAW in order the show volumes of different tracks? Or is it a completely different application without using a DAW at all? When it's...

The latter you can easily check by adding Serial.begin(9600); to void setup() like so: void setup() { Serial.begin(9600); usbMIDI.setHandleControlChange(onCC); < stuff deleted > } and by adding some Serial.print()s to void onCC(byte...

Is this the project you are referring to: https://www.bluecataudio.com/Blog/tip-of-the-day/building-a-midi-controlled-analog-vu-meter/ ? What exactly does not work and what did you try? Can you share your code for review? Are you sure the DAW...

^^ This AI generated spambot is wrong, the 4-pin cable DOES have a 5V line, it's only missing an extra ground line which doesn't matter.

Doesn't hurt to get the right cable, yes. But where do you see that the 4pin connector is missing the 5V pin? There are two GND pins in the 5 pin connector where you can omitt one. The 4pin connector should also work.

You may want to have a look at USBtreeview. This is the tool I use a lot for that purpose. Paul