Yes, it is a board with usb connector and 5v to 3.3v regulator but I don't use the later. I have a external 3.3v regulator and I power the board directly with it.
When I connect a usb to monitor the serial port, I send 5v at the same time than my external 3.3v power. Those ''meet'' each other on ...
Search found 3 matches
- Mon Feb 01, 2021 2:04 am
- Forum: Hardware
- Topic: USB monitoring with 3.3volt external power.
- Replies: 2
- Views: 5791
- Thu Jan 28, 2021 3:25 pm
- Forum: Hardware
- Topic: Connected to multiple relays but only work one at a time
- Replies: 4
- Views: 5499
Re: Connected to multiple relays but only work one at a time
Hi,
From the spec I found for this board, each relay need 65mA @ 3V to work. The 3.3v pin of the ESP can't provide 4x65mA + some current for the logic pin triggerring.
What you need to do is the following:
1- power the relay with a external 3.3v power supply.
2- limit the logic current provide by ...
From the spec I found for this board, each relay need 65mA @ 3V to work. The 3.3v pin of the ESP can't provide 4x65mA + some current for the logic pin triggerring.
What you need to do is the following:
1- power the relay with a external 3.3v power supply.
2- limit the logic current provide by ...
- Wed Jan 27, 2021 9:37 pm
- Forum: Hardware
- Topic: USB monitoring with 3.3volt external power.
- Replies: 2
- Views: 5791
USB monitoring with 3.3volt external power.
Hi. First post here.
I power a ESP32 directly on the 3.3v pin. To avoid conflicting power (5v usb vs 3.3v PSU), I disconnect the 3.3v pin to flash the device and to monitor data on the serial monitor in the arduino IDE.
Now I would like to monitor the data from my device while keeping the 3.3v pin ...
I power a ESP32 directly on the 3.3v pin. To avoid conflicting power (5v usb vs 3.3v PSU), I disconnect the 3.3v pin to flash the device and to monitor data on the serial monitor in the arduino IDE.
Now I would like to monitor the data from my device while keeping the 3.3v pin ...