I could use a digital thermocontroller.
- Yes.
- Of course.
- Every day!!
- No, I already have one
0 voters
Hi
I want to control a heating element (for hobby-chemistry) over software. For that I need to read temperature in the range -10 to +180 °C with a fair accuracy. I already have all the equipment, a temperature probe (of questionable chinese origin), the K8055 (which I successfully used in other projects), some 40A relais etc…
I know there are some similar posts about this topic (and I also googled a lot) but there are some issues I still don’t really get:
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Do I have the install R8 and R9, what are they for and how do I determine their values?
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Has anyone developed a circuit for this purpose, which works? Or any idea where I can find one?
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Existing circuits may need to be modified when I have a different NTC, right? So, when my NTC has a lower (or greater) overall resistance how do I find out, which part is to be modified?
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Existing solutions often employ an amplifier between the sensor and the analog input but don’t mention the necessary details. Has anyone a circuit or a solution for this?
Feel free not to answer every single question I’m thankful for every little bit!
Thanks in advance!
Maniacy
//EDIT: If you help me get this working I will of course supply circuits, program and source for a control and monitoring/logging device for a magnetic stirrer (or similar device) using 2 relais, 2 NTCs, 1 analog contact thermometer, and a few switches (for manual override, event recording, etc.) Looks so far: easypics.us/pics/magstir_screen.html