- Thu Nov 24, 2016 6:40 pm
#58639
Hello guys, i want to ask if is it ok to power supply NodeMcu esp8266 with mini-usb connector right into electricity socket using phone charger adapter.
- Sat Nov 26, 2016 8:03 am
#58706
No. ESP8266 requires 3.3 volts, USB wall wart is 5.
But if you are capable you can modify the USB power supply. I have converted three of them by replacing the regulator zener diode with a smaller voltage one. It's sort of trial and error. You need something between 1.7 and 2.3 v. Output voltage is defined by the sum of voltage across the zener and a optical isolator.
But if you are capable you can modify the USB power supply. I have converted three of them by replacing the regulator zener diode with a smaller voltage one. It's sort of trial and error. You need something between 1.7 and 2.3 v. Output voltage is defined by the sum of voltage across the zener and a optical isolator.
- Sun Nov 27, 2016 5:41 am
#58740
I think this was asking specifically about the NodeMCU Devkit style boards which have a micro usb and regulator on the board - yes its fine to plug that directly into a phone charger to power the esp.
