![]() It is good solution of the reducing of current, but, BUT, WHAT IS IT?! ![]() Nevertheless, there are connected by P-MOSFET transistor, hence theit quiscent current is zero. On the ESP32-CAM board, there are two more regulators for CSI camera - 1.2V a 2.8V. If the AMS1117 is not the main reason of the high deep-sleep current, what else can cause that? The quiscent current "should be" around 5mA, 10mA at maximum. It is easy, the detasheet specifies the quiscent current as typical value and it means nothing. If the AMS1117 consumes cca 5mA, the quiscent current of AP7361C is only 60uA.īut I was surprissed when I find out that the deep-sleep current of ESP32-CAM is still more than 3mA. Based on this easy change, you decrease the the quiscent current of LDO a lot. I replaced the AMS1117 by AP7361C in SOT223R package - R means the same pinout as AMS1117). It is too much for device which is powered by batteries. The quiscent current of AMS1117 is (typical) 5mA, 10mA at maximum. On the first look on the schematic, you see where you can save a few miliampers.Īs the default LDO is used AMS1117, it has a few advantages, but also disadvantages - mainly on focus of deep-sleep current. My project is focused on easy usage - based on PIR sensor, the ESP32-CAM is wake-up and takes the picture, sends to FTP or by e-mail. The deep-sleep current was more than 5mA with the default hardware. I wanted to power the board by batteries, so my goal was to decrease the current in the deep-sleep mode and also in the runnning mode. These parts are designed on 27x40 mm board. ESP32-CAM is very popular development board which contains Wi-Fi and Bluetooth connectivity with ESP32 module, OV2640 camera, slot for microSD card and programmer - USB-UART convertor.
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