Thundercat

I know this thread is ancient, but I use a ton of Lockable Teensys. Recently I bought a batch from SparkFun and so many of them will not lock - they give the same errors in this thread: "Error: Secure mode can not be set" So they are Standard...

Hey again @Chris O. , I've looked at this more deeply and I think you actually gave me a great suggestion! Apologies for dismissing it so quickly. I couldn't see it at first. Also, I don't want to have another board on top of the custom PCB I'm...

Clever! Thanks Michael.

Another option, and the route that I took, is to hook up your device to the battery via Vin, then connect to the computer via a Hub with individual switched ports. Something like this: https://www.amazon.co.uk/dp/B00JX1ZS5O. Each port has a push...

Thank you Tomas, this is extremely helpful.

As long as you connect ONLY GROUND and don't connect +5V coming from USB and external power source together, you would be fine. You just don't want different power supplies to "fight" with each other.

Thank you Chris. I don't see how this would be useful in the project I'm doing, but it is interesting for sure. I think it would add a lot of unnecessary complication and make it really confusing to implement in my situation. Also, I'm going to...

Thank you Tomas. I do not want to cut the trace on the Teensy. And it's not practical on the ESP32 either. I want to run the Teensy and ESP32 directly from the USB bus, and have everything else run off the external PSU supply. Is this a bad...

Yes you can power up your power hungry devices such as LEDs from separate power supply and connect ONLY GND between devices powered with different supplies. Make sure you do NOT connect +5V from external supply to USB 5V line because you are...

Hi, apologies if this is obvious or stupid, but I've got a large project that is going to need more than the 500mA that a USB cable can supply. I'll be using a Teensy 4.1, as well as an ESP32-S3. Yes I know USB-C can deliver much more power, but...