Hey guys! I have a project I'm working on however I'm not too well-versed in this department so I was hoping someone could shed some light upon what I'm trying to build.
Well, I'm trying to operate a 12v fan. The temperature sensor has range of roughly 400-200 ohms that I'm working with. (the sensor actually sends anywhere from 2,600 Ohms to 100 Ohms, but the temperature I need to work within sends approximately 400-200 ohms readings I believe) The lower the resistance, the hotter the temperature. I don't know the exact ranges I need to work with just yet as I haven't measured with my multimeter yet, but let's assume the following:
I need to send a 12v signal to turn on a fan, I can send this to a SPST relay for safety's sake. I need to turn on the fan at a certain resistance (e.g. 200 ohms) and turn it off at a higher resistance (e.g. 300 ohms). I can tap into the temperature sensor's readings to see the exact resistance readings, but my question is, how can I go about setting this up? I'm sure it's more simple than I think but I can't figure it out because I'm not too knowledgeable when it comes to electronics. Any ideas?
I know someone built something that does this however it's not made anymore, and it was programmable (e.g. install in line of the temperature sensor, set it when the desirable temperature is reached to turn fan on, then set it again when it goes down to the desirable temperature to turn the fan off) but I'm not trying to go this far, I just want the fan to turn on/off at a slightly lower temperature.
Any help would be greatly appreciated, thank you so much.
My apologies for any improper terminology used, I'm not too educated in this field but I'm a quick learner.
Well, I'm trying to operate a 12v fan. The temperature sensor has range of roughly 400-200 ohms that I'm working with. (the sensor actually sends anywhere from 2,600 Ohms to 100 Ohms, but the temperature I need to work within sends approximately 400-200 ohms readings I believe) The lower the resistance, the hotter the temperature. I don't know the exact ranges I need to work with just yet as I haven't measured with my multimeter yet, but let's assume the following:
I need to send a 12v signal to turn on a fan, I can send this to a SPST relay for safety's sake. I need to turn on the fan at a certain resistance (e.g. 200 ohms) and turn it off at a higher resistance (e.g. 300 ohms). I can tap into the temperature sensor's readings to see the exact resistance readings, but my question is, how can I go about setting this up? I'm sure it's more simple than I think but I can't figure it out because I'm not too knowledgeable when it comes to electronics. Any ideas?
I know someone built something that does this however it's not made anymore, and it was programmable (e.g. install in line of the temperature sensor, set it when the desirable temperature is reached to turn fan on, then set it again when it goes down to the desirable temperature to turn the fan off) but I'm not trying to go this far, I just want the fan to turn on/off at a slightly lower temperature.
Any help would be greatly appreciated, thank you so much.
My apologies for any improper terminology used, I'm not too educated in this field but I'm a quick learner.
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