Endothermic Task

[honorstoise]

What if you used the peltier cooler idea with an ntc thermistor and an electromagnet. The thermistor would get cooled and rise in resistance, causing an electromagnet to lose strength. However, im not sure whether there are thermistors that can do this.

[terence.tan]

What if you used the peltier cooler idea with an ntc thermistor and an electromagnet. The thermistor would get cooled and rise in resistance, causing an electromagnet to lose strength. However, im not sure whether there are thermistors that can do this.

why are you using an electromagnet?

[honorstoise]

What if you used the peltier cooler idea with an ntc thermistor and an electromagnet. The thermistor would get cooled and rise in resistance, causing an electromagnet to lose strength. However, im not sure whether there are thermistors that can do this.

why are you using an electromagnet?

I'm using an electromagnet to drop something to hit a switch for the next action. The ntc thermistor will weaken the electromagnet when it gets cold. This might count as electricity where it isn't supposed to be used tho...

[TheSquaad]

What if you used the peltier cooler idea with an ntc thermistor and an electromagnet. The thermistor would get cooled and rise in resistance, causing an electromagnet to lose strength. However, im not sure whether there are thermistors that can do this.

why are you using an electromagnet?

I'm using an electromagnet to drop something to hit a switch for the next action. The ntc thermistor will weaken the electromagnet when it gets cold. This might count as electricity where it isn't supposed to be used tho...

We used an electromagnet to initiate one of our tasks. As long as it’s clearly defined that magnetic force ends the electric action and starts the next action, you should be fine.

[ftf841]

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).

[knightmoves]

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?

[honorstoise]

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

[Shr3D]

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

[dragonfruit35]

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!!!

[Shr3D]

Hello,

I don’t know how to reply to posts directly (sorry)

But, what’s a transistor switch and anyone have any links to some? I was thinking on having a backwards/opposite/reverse circuit breaker in between the ntc transistor and the nichrome wire. When the resistance decreases and more current is available, the “reverse” circuit breaker flips the switch to the “on” position and sends electricity to the nichrome.

Any thoughts?

Thanks,
Shr3D