Using 2n222a transistor as switch to turn on/off the wemos
Posted: Tue Feb 07, 2017 6:22 pm
Hello
As newbie in esp8266 world, i spent many days trying to control wemos using 2n222a npn transistor and an arduino
my plan is to keep the arduino running most of time in deep sleep mode,
The arduino will wakup periodicaly and turn on the esp by switching on transitor.
The problem i,m facing is concerinig the resistor value i should use to limit the current to the base.
I just can,t get it work whatever the value i pick.
can anyone help with this?
tnx to you all.
As newbie in esp8266 world, i spent many days trying to control wemos using 2n222a npn transistor and an arduino
my plan is to keep the arduino running most of time in deep sleep mode,
The arduino will wakup periodicaly and turn on the esp by switching on transitor.
The problem i,m facing is concerinig the resistor value i should use to limit the current to the base.
I just can,t get it work whatever the value i pick.
can anyone help with this?
tnx to you all.