Quote:
Originally Posted by rcheshire
This is my current solution to sensor fogging.
Inside the heat resistant sleeve is 10R dew heater. Take a length of nichrome and wind it tight around the leg of a 1W resistor. Slide the wound end off as you go and wind some more. This makes a nice little spiral heater element with a good range of voltage/heating control once stretched slightly to separate the coils.
Insert into sleeve and bend at the corners - solder a couple of thin wires capable of handling a few amps. Fixed as shown with the clear gel double sided tape from Jaycar. It's a bit tight - next version will be a tighter coil.
This works really well. A bit too good, so it needs to be run at a voltage adequate for the level of cooling.
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Thats excellent work Rowland. very impressive.
so is the heat just radiative from the nichrome wire? or does it heat up the shield and that in turn heats the contact area on the glass?
when you say its too effective, what actually happens? does it completely prevent fogging now? so even if the sensor is exposed as it would normally be while exposing, does the heating element prevent fogging?
how about the space below the glass. won't the glass radiate heat onto the sensor face as well?
Alistair