I have remote setup of one ESP32 chip, with a couple of sensors on it and 3 relay boards (total 16 relays). I currently power them with two separate phone usb chargers. One charger for the ESP chip (which powers one 4-relay board through it 5v out) and one usb charger for the two other relay boards. All have common ground to a small breadboard for the ESP to be able to control the relays.
Although this set up seems to be working ok for a year now, i would like to upgrade the PSU as i have the feeling that sometimes (randomly - i can't place it) there's not enough power to switch all 16 relays on.
Unfortunately i have no clue how to go ahead and calculate my needs.
Could i have a small guidance as to how to select a PSU to power the following stuff adequately:
- ESP32 Wroom something like this
- Two (or perhaps three in the future) 4relay board. Sample
- One 8relay board. Sample
Stuff plugged on the ESP chip:
The website I'm shopping from also has Meanwell PSUs for 2 or 3 times the price, is it worth going for a better brand? (safety wise i guess)
Is there an issue if I go for a larger UPS i.e. 5v 14A?
And lastly what about power consumption, will a larger UPS only draw the Watts I need or do they work at full consumption?
Looking forward to some help and sorry a very basic question.