Just received...
1 - ESP32-DEVKITC32D by Espressif via Mouser
2 -ESP-WROOM-32 ESP32 ESP-32S Development Board by HiLetgo via Amazon
Seems either can be powered via USB or External 5 Volt Supply.
Question is: Can you connect both at the same time?
Below is the circuit connecting the USB 5 Volts and the External 5 Volt Supply to the internal circuits on the ESP32 Dev Board...
As I see it the diode blocks the External Supply from connecting to the USB 5 Volts...
But if the USB 5 volts is greater than the External Supply current would flow from the USB 5 volts to the External 5 Volt supply.
I haven't designed circuits in a long time but shouldn't they have placed a diode in series with each supply before connecting them together?
Actual diagram is here...
https://dl.espressif.com/dl/schematics/esp32_devkitc_v4-sch.pdf
Below is my simplified drawing of that power input circuit...
Thanks for any help as I don't want to blow up my new ESP32 Development boards PS - Possible reason for connecting both USB & External 5 Volt Supply...
In the event the application requires more current than the computers USB port can supply
and you don't want to unplug the computer with the IDE and/or interface from the USB port while you test.
1 - ESP32-DEVKITC32D by Espressif via Mouser
2 -ESP-WROOM-32 ESP32 ESP-32S Development Board by HiLetgo via Amazon
Seems either can be powered via USB or External 5 Volt Supply.
Question is: Can you connect both at the same time?
Below is the circuit connecting the USB 5 Volts and the External 5 Volt Supply to the internal circuits on the ESP32 Dev Board...
As I see it the diode blocks the External Supply from connecting to the USB 5 Volts...
But if the USB 5 volts is greater than the External Supply current would flow from the USB 5 volts to the External 5 Volt supply.
I haven't designed circuits in a long time but shouldn't they have placed a diode in series with each supply before connecting them together?
Actual diagram is here...
https://dl.espressif.com/dl/schematics/esp32_devkitc_v4-sch.pdf
Below is my simplified drawing of that power input circuit...
Thanks for any help as I don't want to blow up my new ESP32 Development boards PS - Possible reason for connecting both USB & External 5 Volt Supply...
In the event the application requires more current than the computers USB port can supply
and you don't want to unplug the computer with the IDE and/or interface from the USB port while you test.