1 Symptoms are due to the effects of excess acetylcholine on nicotinic and muscarinic acetylcholine receptors in the CNS, at neuromuscular junctions, and in the sympathetic, and parasympathetic nervous systems. 2  Nicotinic and muscarinic receptors have different. 3  Functions.
We're taking here about mains voltage (say 120 V or 230 V AC) power supplies with power ranging from a few Watts to several hundred Watts. Switch mode power supplies are everywhere; here are some pictures of their guts. The big high power components and small heat sinks are typical of SMPS. These devices are incredibly reliable, but being very often left powered all the time (even when their load is switched off), they still are the weak link.
In other words, if you have the thermostat set to 'heat' and the house doesn't warm up at all, then you use 'emergency heat.' Heat pumps cannot keep up with the heating load in most houses when the temperature gets below a certain point. They have built in supplemental heat to add to what the heat pump does.nce we get that heat from the air into the refrigerant, it's just a matter of bringing it into the house and then transferring it into your home's air. So now the mystery is solved! It's our old friend, the Second Law of Thermodynamics again. Dog photo by Tobyotter from flickr.com, used under Creative Commons license.