Re: Programming help NodeMCU ESP8266
Posted: Wed Jan 29, 2020 12:20 pmI think the photo shows 2 relays are 5V units and powered direct from 5V and the other 2 are 3V and powered from the NodeMCU 3.3V regulator.
Even with the lower regulated current from 2 relays it is still not a great idea to pass that current through the NodeMCU regulator. Even if it can supply the current it will lead to significantly more heat being dissipated by that regulator.
As suggested maybe get the development working with 1 or 2 relays then think through your power supply arrangements when deploying a real solution.
Even with the lower regulated current from 2 relays it is still not a great idea to pass that current through the NodeMCU regulator. Even if it can supply the current it will lead to significantly more heat being dissipated by that regulator.
As suggested maybe get the development working with 1 or 2 relays then think through your power supply arrangements when deploying a real solution.