the question in brief is:
does tip31c transistor stay turned on when it is broken ??
I have a circuit with tip31c transistor
the board consists of sensor and RTC with Arduino.
I need to read heat every ten minutes and log them.
for low power consumption, I used the tip31c transistor in order to turn off everything (RTC and the sensor) and just turn them on when I want to read the temperature.
so every 10 minutes the Arduino will send a signal to the transistor to turn everything ON and do the job, then turn it off again ...
everything was OK..
I connected the Arduino to 5v DC source, it works properly, but I found that the RTC and a led are not being turned off !!
they always ON.
they were working well before I connect them to an external power source.
everything was turned off until I turn the transistor ON
but now they are always ON, I didn't change anything with the circuit...
I afraid that the transistor is broke
so my question is
does the tip31c stay turned ON when it is broken??
or I am missing something
this is a diagram of mi circuit: