- Sat Apr 04, 2020 11:36 pm
#213827
As the title implies, I'm interested in utilizing the Artemis for a project which involves taking analog readings (temperature readings using thermistor probes). With my current MCU this is easy, as I can just use a high output from a digital pin, but that isn't really possible here.
I am concerned with power consumption, so I need to be able to turn the probe circuit on and off. Again, easy enough using the digital pin.
I'm fairly novice at this, and have a couple of general ideas, but would really like to hear from more experienced folks on best practices and theory.
The possibilities I've considered are:
1) Using a voltage divider, but the probe circuit is itself a voltage divider circuit so I'm not sure what the effect will be of chaining them, nor what the power considerations look like here
2) Using a BJT transistor as a switch from an external power source and then using an LDO or zener diode(s) to further adjust the voltage down as needed.
Thanks
I am concerned with power consumption, so I need to be able to turn the probe circuit on and off. Again, easy enough using the digital pin.
I'm fairly novice at this, and have a couple of general ideas, but would really like to hear from more experienced folks on best practices and theory.
The possibilities I've considered are:
1) Using a voltage divider, but the probe circuit is itself a voltage divider circuit so I'm not sure what the effect will be of chaining them, nor what the power considerations look like here
2) Using a BJT transistor as a switch from an external power source and then using an LDO or zener diode(s) to further adjust the voltage down as needed.
Thanks