Endothermic Task

ftf841
Member
Member
Posts: 31
Joined: March 28th, 2017, 3:21 pm
Division: C
State: MD
Has thanked: 0
Been thanked: 0

Re: Endothermic Task

Post by ftf841 »

Does anyone know how to use a thermistor to activate the next task without a micro-controller like an arduino?
i'll work on my events eventually

Centennial High School
Exclusive Game On Competitor
User avatar
Alex-RCHS
Member
Member
Posts: 539
Joined: November 4th, 2016, 3:46 pm
Division: Grad
State: NC
Has thanked: 3 times
Been thanked: 1 time

Re: Endothermic Task

Post by Alex-RCHS »

ScottMaurer19 wrote:
Snarknado wrote:
ScottMaurer19 wrote: According to the coaching academy, yes.
Good luck keeping an ice cube all the way from impound.
Try keeping it overnight when traveling ;)
Work with the thermodynamics pair on your team. :P
About me!
Raleigh Charter HS (NC) 2018
UNC-Chapel Hill 2022
User avatar
Snarknado
Member
Member
Posts: 46
Joined: March 5th, 2017, 8:24 pm
Division: C
State: WA
Has thanked: 0
Been thanked: 0

Re: Endothermic Task

Post by Snarknado »

Alex-RCHS wrote:
ScottMaurer19 wrote:
Snarknado wrote: Good luck keeping an ice cube all the way from impound.
Try keeping it overnight when traveling ;)
Work with the thermodynamics pair on your team. :P
As long as we're on the topic of the obstacles of impound, do you need to leave all tools for last minute adjustments inside your box at impound?
Raisbeck Aviation High School Wiki
Snarknado's Userpage
"All we can do now is pray to Hot Glue Cthulu"
ScottMaurer19
Member
Member
Posts: 592
Joined: January 5th, 2017, 9:39 am
Division: Grad
State: OH
Has thanked: 0
Been thanked: 1 time

Re: Endothermic Task

Post by ScottMaurer19 »

Snarknado wrote:
Alex-RCHS wrote:
ScottMaurer19 wrote: Try keeping it overnight when traveling ;)
Work with the thermodynamics pair on your team. :P
As long as we're on the topic of the obstacles of impound, do you need to leave all tools for last minute adjustments inside your box at impound?
There isn't impound until states but I personally plan to just so the event supervisor can't say that I had to impound my materials and my device. As far as I can tell there is nothing in the rules stating what must be impounded.
Solon '19 Captain, CWRU '23
2017 (r/s/n):
Hydro: 3/5/18
Robot Arm: na/1/1
Rocks: 1/1/1

2018 (r/s/n):
Heli: 2/1/7 
Herp: 1/4/4
Mission: 1/1/6
Rocks: 1/1/1
Eco: 6/3/9

2019 (r/s/n):
Fossils: 1/1/1
GLM: 1/1/1
Herp: 1/1/5
Mission: 1/1/3
WS: 4/1/10

Top 3 Medals: 144
Golds: 80
Ten086
Member
Member
Posts: 36
Joined: November 19th, 2016, 12:35 pm
Division: C
Has thanked: 0
Been thanked: 0

Re: Endothermic Task

Post by Ten086 »

Hey, do you guys have any tips for sensing the temperature change? We're using a reaction with ammonium chloride, but using a thermistor didn't work well because the water messed it up. We also tried using a bimetallic thermostat, but it didn't switch consistently...any tips?
Just trying my best...
jinhusong
Member
Member
Posts: 171
Joined: March 16th, 2017, 3:34 pm
Division: C
State: CA
Has thanked: 2 times
Been thanked: 2 times

Re: Endothermic Task

Post by jinhusong »

Ten086 wrote:Hey, do you guys have any tips for sensing the temperature change? We're using a reaction with ammonium chloride, but using a thermistor didn't work well because the water messed it up. We also tried using a bimetallic thermostat, but it didn't switch consistently...any tips?
Temperature sensor LM35 or TMP36, heat shrink to water proof. Then setup comparator LM358 with a reference voltage. The output can drive MOSFET or a relay with help of transistor.
davecutting
Member
Member
Posts: 34
Joined: October 29th, 2014, 4:12 pm
Division: C
State: NY
Has thanked: 0
Been thanked: 0
Contact:

Re: Endothermic Task

Post by davecutting »

jinhusong wrote:
Ten086 wrote:Hey, do you guys have any tips for sensing the temperature change? We're using a reaction with ammonium chloride, but using a thermistor didn't work well because the water messed it up. We also tried using a bimetallic thermostat, but it didn't switch consistently...any tips?
Temperature sensor LM35 or TMP36, heat shrink to water proof. Then setup comparator LM358 with a reference voltage. The output can drive MOSFET or a relay with help of transistor.
Or you can try adafruit's pre-potted thermistor - it's got a nice epoxy coating that keeps it dry.
David Cutting
Ward Melville HS Science Olympiad
Hovercraft: Islip Invy 2[sup]nd[/sup], MIT Invy 26[sup]th[/sup], Regionals 3[sup]rd[/sup], SOUP 3[sup]rd[/sup], Statees 3[sup]rd[/sup]
Mission Possible: Islip Invy 11[sup]th[/sup], MIT Invy 11[sup]th[/sup], Regionals 1[sup]st[/sup], SOUP 2[sup]nd[/sup], States 2[sup]nd[/sup]
Game (Alternate): MIT Invy 32[sup]nd[/sup]
Locked

Return to “Mission Possible C”

Who is online

Users browsing this forum: No registered users and 2 guests