Thanks. nitpick away. You are right these details matter.You have a typo, 5A should be 5V. Yes, it's nitpicking, but details are critical. If you're going to be doing this sort of thing regularly then double check everything.I've been shopping around for an alternative PSU. And I have picked this one:
IRM-30-5ST : https://www.digikey.com/en/products/det ... ND/7704677
This has a current rating of 6A and voltage rating of 5A. Will this work? I ask because the original PSU that came with Raspberry 4B is rated at 5.1V and 3.5A. Notice I'm off by 0.1V (2% deviation)
Besides the voltage rating mismatch, is there anything else I should be considering? For example: (a) PSU noise, (b) how quickly the PSU can ramp up the changing current demands (and other things i've probably missed) of the PI?
The 5V rating is fine. Yes you need to be aware of noise and transient response, and should probably have fat wires from the PSU to the Pi to reduce voltage drop. You also need to be aware that one end of the PSU has mains voltage applied. It looks like the screw terminals are shrouded, but it's still dangerous if not in an enclosure.
I'm not totally sure why you'd want to incorporate this style of PSU, when an external USB-C PSU is easily and cheaply available, and much safer.
I am making PI a part of a bigger portable unit. And, I'm using the portable unit AC supply to power my PI (basically putting PI inside the box of this bigger unit and using its AC lines to get DC for PI). When it comes to safety, I've considered connecting the live wires to something like this: https://www.amazon.com/Legrand-SA155CC1 ... hvexpln=73
And then just using my PI PSU to connect to the above connector. Safety is definitely a concern. I'm even looking at different type of connectors to reduce loosening of wires over time due to vibration -- screw terminals have high risk of this happening. I don't know what to look for basically. Let me know if you have any connectors in mind.
The fat wires to reduce voltage drop was very helpful. Thanks
Statistics: Posted by microberry — Mon Sep 02, 2024 3:30 am