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Registered Member #1822
Joined: Fri Nov 21 2008, 08:04PM
Location:
Posts: 300
I recently purchased a heating blanket and found that it is way too hot even on the lowest setting. If I added a diode wouldnt that make it 50% duty cycle and reduce the heat that much?
Registered Member #1822
Joined: Fri Nov 21 2008, 08:04PM
Location:
Posts: 300
I will have to check whats going on in the inside first but, I assume that it uses a cap as the resistive load based on the controlls. It has 3 settings
Registered Member #2028
Joined: Mon Mar 16 2009, 08:13PM
Location: Norway
Posts: 319
Buy another one, sew them together and wire them in series. You'll have a twice as big (or twice as thick) blanket with one fourth of the power per square meter.
How many wires are coming from your blanket? It could be that the blanket has two or more separate resistance wires, that are simply switched between series/paralell operation.
The best and probably the easiest solution is to toss away the old regulator and replace it with a dimmer.
Umm, does these blankets run on 230Vac or are they operated at a safe low voltage?
Registered Member #1394
Joined: Sun Mar 16 2008, 06:18PM
Location:
Posts: 111
Get a nice blanket, don't try and hack n jack something you are going to wrap around your body or sleep with. The last thing you want is a fire starting some how! I got one recently it was about $100 with a coupon and it has a full digital control unit on the side (my room in cold as hell because I get almost no heat from the vent). It goes from level Low then 1 to 10 and finally High. I usually sleep at level 3 and stay nice and warm all night (its not hot just warm). Low is practically useless it makes no heat and well High that's another story I went to bed with it on high and woke up an hour later in a sort of body overheat because it got so hot.
But if your really bent on doing this then I think your best bet would be to use a dimmer. The problem is that to much current is going to the blanket and thus producing too much heat so if you starve it of current it should go down.
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3141
If you put the heating blanket on the mattress and cover it with a thick blanket then your bed sheet, it should be ok.
I thought electric blankets were for warming the bed before you get in - not while you're in it. A suitable Duvet is a low-energy solution to keeping warm.
If the controller gives line ac to the blanket then a diode would reduce the power to 50% as you thought, even if a Triac/phase-controller is part of the controller.
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Heating Blanket too hot
