Maker Pro
Maker Pro

First Project

R

Rahein

Jan 1, 1970
0
This is my first time building anything like this my self, and I don't
really know where to start.

I want to make a small (~12 cubic inches) chamber with a heating
element in that heats the air to a temperature of 200F-400F, which can
be adjusted. When the air reaches the set temperature a thermostat will
kick the heating element off and light an indicator light. It would be
powered by an attached battery pack.

Can anyone point me to some resource that can help me on my project?
Any help you can give would be great.

Thanks
Rahein
 
T

Tim Williams

Jan 1, 1970
0
Rahein said:
Can anyone point me to some resource that can help me on my project?
Any help you can give would be great.

Yeah, hook up an op-amp to the thermistor and a voltage reference. When
Vtemp > Vref, op-amp switches off the heater. (Drive the heater thru a nice
transistor or MOSFET.) Calibrate the temp with a thermometer and you're
done.

As for actual refs...Google op-amps.. transistors.. resistors.. capacitors..
and the nature of the universe itself.

I do however question the usefulness of your project. Do you realize how
many batteries this is going to go through to keep it heated for ten
minutes? You'd better have aerogel insulation in there.

Tim
 
R

Rahein

Jan 1, 1970
0
Tim said:
Yeah, hook up an op-amp to the thermistor and a voltage reference. When
Vtemp > Vref, op-amp switches off the heater. (Drive the heater thru a nice
transistor or MOSFET.) Calibrate the temp with a thermometer and you're
done.

As for actual refs...Google op-amps.. transistors.. resistors.. capacitors..
and the nature of the universe itself.

I do however question the usefulness of your project. Do you realize how
many batteries this is going to go through to keep it heated for ten
minutes? You'd better have aerogel insulation in there.

Tim

Thanks, I will look up those terms latter today when I have some time.

The air does not need to stay at that tempature. Just warm up to the
correct temp and then shut off. There is nothing stopping me from
plugging it into the wall, I just thought that would increase the
difficulty and cost. There may be better ways to make this, like I said
it is my first project.

PS: On www.omega.com is their FREE litature really free, or is there
some catch?
 
R

Rich Grise

Jan 1, 1970
0
Yeah, hook up an op-amp to the thermistor and a voltage reference. When
Vtemp > Vref, op-amp switches off the heater. (Drive the heater thru a nice
transistor or MOSFET.) Calibrate the temp with a thermometer and you're
done.

As for actual refs...Google op-amps.. transistors.. resistors.. capacitors..
and the nature of the universe itself.

I do however question the usefulness of your project. Do you realize how
many batteries this is going to go through to keep it heated for ten
minutes? You'd better have aerogel insulation in there.

It's finals week.

Cheers!
Rich
 
R

Rich Grise

Jan 1, 1970
0
This is my first time building anything like this my self, and I don't
really know where to start.

I want to make a small (~12 cubic inches) chamber with a heating
element in that heats the air to a temperature of 200F-400F, which can
be adjusted. When the air reaches the set temperature a thermostat will
kick the heating element off and light an indicator light. It would be
powered by an attached battery pack.

Can anyone point me to some resource that can help me on my project?
Any help you can give would be great.

http://www.google.com/search?q=thermostat

Good Luck!
Rich
 
H

Homer J Simpson

Jan 1, 1970
0
Thanks, I will look up those terms latter today when I have some time.

The air does not need to stay at that tempature. Just warm up to the
correct temp and then shut off. There is nothing stopping me from
plugging it into the wall, I just thought that would increase the
difficulty and cost. There may be better ways to make this, like I said
it is my first project.

Why not a toaster oven?
 
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