T&L Publications

For CCS charging - T =C*V/I

So the V in the formula is the voltage sourcing the CSS right? Obviously it is not the voltage coming out of it (sourcing the cap) since that would be increasing linearly over time.

I understand that when you charge a capacitor through a resistor the time constant can be calculated with the simple formula t=RC. However, I would think the formula would be more complex if a constant current source (CCS) were substituted for the resistor in such a circuit since the CCS would seem ...

I see current monitoring devices available that clamp on or around a power lines so it passes through (without connection) but they all seem to be for measuring/monitoring high current loads, i.e. 50 amp and above. Couldn’t that technology be scaled down to detect current at a level of, say, 5 to ...

And remember too ask them to put the item aside for you

And get their name as well.

I always click the "find it near you" link in their on-line catalog. If it brings up a store that supposedly has the part I call them and ask and, if they say yes, most importantly, I ask them to go look to make sure.

Makes more sense now. Thanks for the explanation.

Just reading up on the furnace in this new house. Yikes, it has an ignitor that works like the glo-plugs I recall from the motors in my model airplane flying days. Gets white hot then poof the gas comes on and ignites. The literature says it will need replacing every 3 to 5 years. That seems like cr...

The problem is that humans feel a chill if air is moving. True but the degree of chill depends on the velocity of moving air. That is one reason why ceiling fans are helpful when heating systems are running. The ceiling fan can be set to low speed and have the rotation directing the air up from bel...

As another thought, if the heater has a blower/fan why not rewire it so it runs continuously? The air sample will be more accurate. I have a small heat pump in a sunroom addition and the temperature sensing is via the return air. It works well since the fan actually slows down when the compressor g...

Bigglez. It had two wires. The sensor itself was a small round component, about the diameter of a soda straw and about 1/2 inch long. I assume it is a thermistor. I began looking for it on the circuit board, alternately spraying from a Dust-Off can (upside down to get cold liquid) and then reheating...

Actually, I have a digital t'stat in my weekend cabin to keep a heater in a drafty bathroom at a constant temperature. Leave it on and set for 40 f. when we're not there to prevent pipes from freezing. The unit is from Lux and the advantage is that it has an AC plug built in (is for controlling base...

I was wondering about rapid cycling but, as you pointed out, the latency of the sensor (or maybe the MP controller code) is handling it well. I suppose if it had been a problem I could have wrapped the sensor in some insulating material to slow down its recovery and dampen an overly rapid response. ...

I’ve been so blasted frustrated with several floor heaters I bought which feature digital control. The problem with these cheap heaters is that the sensing element is inside the heater, obviously near the intake side to get a reading close to the average room temperature. However, when the set poi...

I understand your dilemma. I have just moved into a three level house with a thermostat for each floor. In considering the problem I thought about the fact that when a lower unit is heating, the hot air will rise through the stairwells toward the upper floors, and vice versa when the weather is warm...

Good point, Bigglez. The runs are all coming together at a multitap amplifier (8 spigots!) but I only have two rooms with TV's and those are not the 3 rooms I want the stations. Since there are so many runs from the amp I assume they didn't use any additional splitters downstream. BTW my cable provi...