I have an external switch connecting GND to RST on an 8266, it looks like this: [GND] ------ [normally open switch] -------- [8266 RST pin]. The ESP goes to sleep, and then the switch wakes it up. However while in operation I want this reset functionality disabled, but at a hardware level when the RST pin receives a GND signal it resets.
Ideally I'd have a component like a transistor that would always be closed/connected/on without any voltage or current applied to it. So that would be like [GND] ------ [normally open switch] ---- [new transistor] ---- [8266 RST pin]. Then when the reset functionality is to be disabled it applies 3.3V to the transistor's base and the switch "opens" instead of what I'm more familiar with where an NPN transistor "closes" when the voltage is applied to the base.
This project is battery powered and while sleeping the entire hardware takes < 22uA currently. Something on the order of uA to continuously run is tolerable, but the ideal would be to have a component that is just naturally closed/on and can be interrupted with a voltage. What would a component like that be?
Ideally I'd have a component like a transistor that would always be closed/connected/on without any voltage or current applied to it. So that would be like [GND] ------ [normally open switch] ---- [new transistor] ---- [8266 RST pin]. Then when the reset functionality is to be disabled it applies 3.3V to the transistor's base and the switch "opens" instead of what I'm more familiar with where an NPN transistor "closes" when the voltage is applied to the base.
This project is battery powered and while sleeping the entire hardware takes < 22uA currently. Something on the order of uA to continuously run is tolerable, but the ideal would be to have a component that is just naturally closed/on and can be interrupted with a voltage. What would a component like that be?