Re: WLAN remote control
Posted: Thu Oct 29, 2020 4:07 pm
In my circuit an active low turns on the MOSFET which charges up the capacitor connected to EN in a few uSec. If the signal disappears and the MOSFET turns off then the capacitor will keep EN active for about 5 seconds which is plenty of time for the ESP88266 to fully boot up and activate the hold signal on the GPIO to maintain the EN signal. When the ESP8266 prepares to sleep it removes the hold.
I like using the little Lithium cells as they simplify the powering just using an LDO regulator, they are smaller / lighter than AAA and of course can be recharged. I use an external Lithium charging circuit that plugs into the module direct across th ebattery snd I re-use across all similar modules.
I like using the little Lithium cells as they simplify the powering just using an LDO regulator, they are smaller / lighter than AAA and of course can be recharged. I use an external Lithium charging circuit that plugs into the module direct across th ebattery snd I re-use across all similar modules.