Incorrect Thermistor Reading

Post Reply
User avatar
Posts: 1
Joined: December 11th, 2019, 5:50 pm
Division: C
Has thanked: 0
Been thanked: 0

Incorrect Thermistor Reading

Post by eggsandfroot » December 11th, 2019, 7:12 pm

I've been using the TI- Inspire Innovator Hub (and a CX calculator) with a 10k Ohm NTC Thermistor. When I make a circuit with a 100 Ohm resistor in it, I consistently get readings that are about negative 70 degrees (at room temperature). When I take the resistor out of the circuit, the readings are all around positive 53 degrees. I'm trying to figure out what I'm doing wrong, are those the numbers I should be getting with those setups? Do I need to use a different strength resistor?

Thanks in advance.

User avatar
Posts: 138
Joined: February 8th, 2019, 12:41 pm
Division: C
State: NY
Location: Dead
Has thanked: 8 times
Been thanked: 4 times

Re: Incorrect Thermistor Reading

Post by MTV<=>Operator » December 29th, 2019, 2:13 pm

Where in the circuit is your resistor? If you are using a 10k ohm thermistor, I'm pretty sure you need a 10k ohm resistor connecting the cathode to ground.
THHS '21 Builder Cult Member
2017-2018: Mousetrap, Hovercraft, Towers
2018-2019: Mousetrap (8th regional), Boomilever (3rd regional), Wright Stuff
2020 Events/YUSO/regional
Gravity Vehicle/9/5
Detector Building/8/7
Wright Stuff/--/10
Ping Pong Parachute/--/--

Post Reply

Return to “Detector Building C”

Who is online

Users browsing this forum: No registered users and 1 guest