i have a project which is battery powered and im using an ESP32 board and a DF PLAYER MINI -
everything works as i need but I'm facing an issue with the DFPlayer Mini, as it lacks a sleep mode. Even when I attempt to set it to sleep, it continues to consume the same amount of energy. To address this problem, I'm considering the addition of a MOSFET to control its power supply, allowing me to turn it on and off as needed.
I initially attempted to use an IRLZ44N MOSFET, but unfortunately, it did not work as expected. You can see the setup in the image below:
i'm reluctant to use NPN transistors as they tend to waste energy, and the entire project is powered by a battery. To maximize power efficiency, I'm seeking an alternative solution to control the DFPlayer Mini.
someone told me to use IRLML2502 insteand of irlz44n. is this correct?
The resistors and capacitor on the gate stop a sharp current switching edge, on VCCOUT, which can cause some Arduinos to detect a power brownout and reset.
You say it didn't work as expected. How did it work? What was wrong about the way it worked?
I assume there are other connections between the ESP32 and the DF Player. when you switch off the Player's GND line, then all the Player's pins will drift up to 5V. Since the ESP32 is running at 3.3V, current may still flow through the ESP32's protection diodes even if the ESP32 lines are not active low.
I think the solution is to use srnet's P-channel mosfet to switch the 5V line. But even then, all the other pins will drift to ground , so if the ESP32 has connecting lines that are trying to be high, current will still flow. So in addition to switching off the P-channel, you also need to make sure that all the other ESP lines going to the Player are low or tri-state.
