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Search: Posts Made By: Xringer
Forum: Appliances & Gadgets 11-28-09, 10:29 AM
Replies: 49
Views: 84,713
Posted By Xringer
remote thermistor?

I wonder if the thermistor could be removed from a modern Tstat
(like the RTH221B1000)

Honeywell at Lowe's: 1-Week Basic Programmable Thermostat...
Forum: Appliances & Gadgets 11-27-09, 04:41 PM
Replies: 49
Views: 84,713
Posted By Xringer
How about using and old room thermostat? When we...

How about using and old room thermostat? When we went to programmable
thermostats, we saved our old Honeywell units. I have one that does both AC & Heating
somewheres in my junk. That would be...
Forum: Appliances & Gadgets 10-05-09, 02:28 PM
Replies: 49
Views: 84,713
Posted By Xringer
Looking at that diagram.. ...

Looking at that diagram..

http://www.jc-solarhomes.com/DTT/DTtherm1.jpg

The thermistors form a simple (2.5V) voltage divider. So, you could use two
5k or two 10k etc. As long as they were...
Forum: Appliances & Gadgets 10-05-09, 02:03 PM
Replies: 49
Views: 84,713
Posted By Xringer
Hey, I wonder if that LM324 chip is the same as...

Hey, I wonder if that LM324 chip is the same as the 324 chip in my antique 1981 controller?
Of course mine requires no soldering. ;) It's just plug-n-play!
Forum: Appliances & Gadgets 10-05-09, 01:50 PM
Replies: 49
Views: 84,713
Posted By Xringer
Just buy two of the same type and they would...

Just buy two of the same type and they would pretty close..
I think these RS models are 1%..
RadioShack Thermistor (271-0110) (http://support.radioshack.com/support_supplies/31961.htm)
Forum: Appliances & Gadgets 10-05-09, 10:18 AM
Replies: 49
Views: 84,713
Posted By Xringer
I'm pretty sure they were just plain old 10k...

I'm pretty sure they were just plain old 10k thermistors.
IIRC, the ones that came with the system were junk. After a few years,
I replaced them (Radio Shack) and epoxied potted the new...
Forum: Appliances & Gadgets 10-03-09, 11:49 PM
Replies: 49
Views: 84,713
Posted By Xringer
The standby isn't going to be very much, when...

The standby isn't going to be very much, when compared to those two cartridge pumps
running almost the whole time the sun is on the collectors.
The motor run-time might be lower, if you used a...
Forum: Appliances & Gadgets 10-03-09, 08:50 PM
Replies: 49
Views: 84,713
Posted By Xringer
I had Solar Hot water for about 17 years, before...

I had Solar Hot water for about 17 years, before the system started leaking a lot..
When we took it out, I kept the pumps (one is solid brass) and the controller.
I think it might have used 10k...
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