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Re: Exothermic Task
Posted: February 23rd, 2018, 5:02 pm
by PM2017
tarembrandt wrote:Are matches allowed? My idea was to have kanthal or nichrome wire wrapped around a piece of a match, so that when the circuit is activated, the wire would get red hot and ignite the match, emitting light for a few seconds, which would then activate an LDR in a separate circuit.
Yes they are. Just be careful to make sure it complies with the FAQ here:
https://www.soinc.org/mission-possible-1
Re: Exothermic Task
Posted: February 26th, 2018, 10:19 am
by Rezalis
For this task, I'm just using a G4 Halogen bulb, a photoresistor, a TIP120 transistor, and an Arduino. It has been working reliably since December and has run consistently hundreds of times. I highly recommend this method, because it's easy to do and it is very unlikely to fail.
Re: Exothermic Task
Posted: April 2nd, 2018, 4:00 pm
by JordanPro
If the only requirements of this task involve an exothermic action and light, could one use an incandescent flashlight to shine on a photocell in order to activate the next action? Since incandescent bulbs actually produce heat as opposed to a LED.
Re: Exothermic Task
Posted: April 2nd, 2018, 4:28 pm
by terence.tan
JordanPro wrote:If the only requirements of this task involve an exothermic action and light, could one use an incandescent flashlight to shine on a photocell in order to activate the next action? Since incandescent bulbs actually produce heat as opposed to a LED.
Yes you can. I think thats how everyone else is doing it
Re: Exothermic Task
Posted: April 4th, 2018, 7:54 pm
by erico.vert
Rezalis wrote:For this task, I'm just using a G4 Halogen bulb, a photoresistor, a TIP120 transistor, and an Arduino. It has been working reliably since December and has run consistently hundreds of times. I highly recommend this method, because it's easy to do and it is very unlikely to fail.
Could you explain how you did this? I'm very new to arduinos but I feel like it's the best and most reliable way of doing this task
Re: Exothermic Task
Posted: April 5th, 2018, 10:44 am
by LIPX3
erico.vert wrote:Rezalis wrote:For this task, I'm just using a G4 Halogen bulb, a photoresistor, a TIP120 transistor, and an Arduino. It has been working reliably since December and has run consistently hundreds of times. I highly recommend this method, because it's easy to do and it is very unlikely to fail.
Could you explain how you did this? I'm very new to arduinos but I feel like it's the best and most reliable way of doing this task
Very simple code, you can find examples of how to use a photocell and an LED on Arduino online. A low-voltage light bulb will work in an identical way.