Endothermic Task

erico.vert
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Re: Endothermic Task

Postby erico.vert » February 3rd, 2019, 9:02 am

Hello,

This is my first post ever and first year doing Mission Possible. I was thinking to have the pettier chip and then have a thermistor connected which reacts to it being heated up. Then I was planning on having the heat up cause less resistance in thermistor since it’s ntc and then heat up a nichrome wire to burn a string. Does this count as two separate tasks?

Any help will be appreciated.

Thanks,
Shr3D
Yes, assuming you write your ASL to clearly separate the two tasks WITHOUT adding an intermediate, since you can't have intermediate tasks that use electricity. Also, you may not be able to directly control your nichrome just by lowering the resistance- it might be necessary to use a transistor switch, but you can experiment with that :)

PS: Welcome to Scioly!!! :D
I noticed you said you wanted to use the side of the peltier ship that heats up, but for this tasks, you would have to use the side that cools off, since it is an endothermic action, not exothermic. You could use a ptc thermistor, however those are a little harder to find.

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dragonfruit35
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Re: Endothermic Task

Postby dragonfruit35 » February 3rd, 2019, 2:02 pm

Hello,

This is my first post ever and first year doing Mission Possible. I was thinking to have the pettier chip and then have a thermistor connected which reacts to it being heated up. Then I was planning on having the heat up cause less resistance in thermistor since it’s ntc and then heat up a nichrome wire to burn a string. Does this count as two separate tasks?

Any help will be appreciated.

Thanks,
Shr3D
Yes, assuming you write your ASL to clearly separate the two tasks WITHOUT adding an intermediate, since you can't have intermediate tasks that use electricity. Also, you may not be able to directly control your nichrome just by lowering the resistance- it might be necessary to use a transistor switch, but you can experiment with that :)

PS: Welcome to Scioly!!! :D
I noticed you said you wanted to use the side of the peltier ship that heats up, but for this tasks, you would have to use the side that cools off, since it is an endothermic action, not exothermic. You could use a ptc thermistor, however those are a little harder to find.
Ohhhh yeah this too. I missed that, sorry. Another reason to not control directly off the resistance...

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Re: Endothermic Task

Postby honorstoise » February 4th, 2019, 1:48 pm

Why are microcontrollers banned? Are all of them programmable?

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Re: Endothermic Task

Postby CookiePie1 » February 4th, 2019, 2:45 pm

Why are microcontrollers banned? Are all of them programmable?
Yes, most of them are programmable. The way I see it, they're trying to let more people participate in Mission rather than just the people that can code. I think another part of it is to try to limit the extent to which teams can 'pay to win' by spending a lot of money on the best technology. However these are just guesses, so don't take my word for it.
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Re: Endothermic Task

Postby stevieb711 » February 4th, 2019, 5:18 pm

Does anyone have a good way of activating something from the temperature change? We're trying to use a peltier cooler right now, but it isn't producing enough of a change to switch a bimetallic thermostat (switches at 15 C).
Do you have good thermal contact between the cold side of your peltier and the thermostat? If you hit the peltier with an IR thermometer, how cold is it? Are you running adequate current through it?
I'm pretty sure this has already been linked, and props to whoever did, but couldn't you use this?

https://www.amazon.com/Intelligent-Digi ... Thermostat
I feel like the "intelligent thermostat" would qualify as a programmable part and therefore not allowed. Am I wrong?

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Re: Endothermic Task

Postby honorstoise » February 4th, 2019, 6:23 pm


Do you have good thermal contact between the cold side of your peltier and the thermostat? If you hit the peltier with an IR thermometer, how cold is it? Are you running adequate current through it?
I'm pretty sure this has already been linked, and props to whoever did, but couldn't you use this?

https://www.amazon.com/Intelligent-Digi ... Thermostat
I feel like the "intelligent thermostat" would qualify as a programmable part and therefore not allowed. Am I wrong?
Yes, i see now. It would not be legal but maybe you could use an analog thermostat. or use an infrared beam with a thermometer to block the infrared maybe? Mercury i think is conductive so it should block infrared but im not sure.

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Re: Endothermic Task

Postby CookiePie1 » February 4th, 2019, 8:01 pm


I'm pretty sure this has already been linked, and props to whoever did, but couldn't you use this?

https://www.amazon.com/Intelligent-Digi ... Thermostat
I feel like the "intelligent thermostat" would qualify as a programmable part and therefore not allowed. Am I wrong?
Yes, i see now. It would not be legal but maybe you could use an analog thermostat. or use an infrared beam with a thermometer to block the infrared maybe? Mercury i think is conductive so it should block infrared but im not sure.
Mercury thermometers are hard to obtain and would most likely not be allowed as it is a hazardous substance.
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Re: Endothermic Task

Postby honorstoise » February 11th, 2019, 5:26 pm

I feel like the "intelligent thermostat" would qualify as a programmable part and therefore not allowed. Am I wrong?
Yes, i see now. It would not be legal but maybe you could use an analog thermostat. or use an infrared beam with a thermometer to block the infrared maybe? Mercury i think is conductive so it should block infrared but im not sure.
Mercury thermometers are hard to obtain and would most likely not be allowed as it is a hazardous substance.
I came up with a thermistor circuit so none of this is a problem anymore. Also, our family has a lot of mercury thermometers and side story: i broke one of them oops.

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Re: Endothermic Task

Postby Shr3D » February 17th, 2019, 4:12 pm

Wouldn’t you be able to use the heated side of the peltier to do this action? It’s the endothermic action causing the other side to get hot... therefore, I don’t see why this wouldn’t be allowed...

Also, does anyone have a diagram of how to make a transistor switch? Or just pm it to me if you don’t want to give it to everyone... same with any other stuff I may/have asked so far... thanks
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Re: Endothermic Task

Postby stevieb711 » February 20th, 2019, 3:25 pm

Wouldn’t you be able to use the heated side of the peltier to do this action? It’s the endothermic action causing the other side to get hot... therefore, I don’t see why this wouldn’t be allowed...

Also, does anyone have a diagram of how to make a transistor switch? Or just pm it to me if you don’t want to give it to everyone... same with any other stuff I may/have asked so far... thanks
You can't use the hot side because the next action must be triggered "because of the reduction in temperature"


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