Search found 546 matches

by jimandy
Thu Nov 27, 2008 6:44 am
Forum: General Discussion
Topic: sump pump monitor
Replies: 26
Views: 6706

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 ...
by jimandy
Wed Nov 26, 2008 6:01 pm
Forum: General Discussion
Topic: RadioShack prototyping pcbs?
Replies: 9
Views: 2888

And remember too ask them to put the item aside for you
And get their name as well.
by jimandy
Wed Nov 26, 2008 6:32 am
Forum: General Discussion
Topic: RadioShack prototyping pcbs?
Replies: 9
Views: 2888

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.
by jimandy
Mon Nov 24, 2008 4:14 pm
Forum: General Discussion
Topic: Furnace ignitor
Replies: 7
Views: 2003

Makes more sense now. Thanks for the explanation.
by jimandy
Mon Nov 24, 2008 1:48 pm
Forum: General Discussion
Topic: Furnace ignitor
Replies: 7
Views: 2003

Furnace ignitor

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...
by jimandy
Fri Nov 21, 2008 4:17 pm
Forum: General Discussion
Topic: Digital heater kluge
Replies: 12
Views: 2911

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...
by jimandy
Fri Nov 21, 2008 5:43 am
Forum: General Discussion
Topic: Digital heater kluge
Replies: 12
Views: 2911

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...
by jimandy
Wed Nov 19, 2008 5:56 pm
Forum: General Discussion
Topic: Digital heater kluge
Replies: 12
Views: 2911

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...
by jimandy
Wed Nov 19, 2008 4:07 pm
Forum: General Discussion
Topic: Digital heater kluge
Replies: 12
Views: 2911

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...
by jimandy
Wed Nov 19, 2008 12:46 pm
Forum: General Discussion
Topic: Digital heater kluge
Replies: 12
Views: 2911

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. ...
by jimandy
Wed Nov 19, 2008 12:13 pm
Forum: General Discussion
Topic: Digital heater kluge
Replies: 12
Views: 2911

Digital heater kluge

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...
by jimandy
Wed Nov 19, 2008 6:54 am
Forum: General Discussion
Topic: REMOTE TEMPERATURE READINGS
Replies: 7
Views: 2317

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...
by jimandy
Tue Nov 18, 2008 5:30 pm
Forum: General Discussion
Topic: Wired intercom help
Replies: 5
Views: 1433

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...
by jimandy
Tue Nov 18, 2008 5:12 pm
Forum: General Discussion
Topic: Wired intercom help
Replies: 5
Views: 1433

Thanks Steve. That's what I'm looking for. Simple and from a minimum of components. Just wish I could find them already assembled in one box!
by jimandy
Tue Nov 18, 2008 7:12 am
Forum: General Discussion
Topic: Wired intercom help
Replies: 5
Views: 1433

Wired intercom help

After looking at prices and reviews of wireless intercoms for the new house I recently moved to I found that through-the-powerline units were notoriously unreliable and prone to interference and RF units were quite expensive, (I need 3 stations). While thinking about a wired system and the problems ...