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Where is the heating/cooling mode switch?<p>I suggest a second heating only thermostat set 45°F parallel to your rig. That way in winter the pipes won't freeze while the normal thermostat is waiting for you to call.<p>Cheers,<p>[ August 03, 2004: Message edited by: Dale Y ]</p>

350Hz and 440Hz combined.<p>Other countries may use different dial tone frequencies simply because they choose a different standard way back when. PBXs and key systems may use different frequencies intentionally so you can tell which switch you are getting the signal from.<p>Cheers,<p>[ July 30, 200...

Even with aluminum, 9ft tall by 16in(?) on each side is a large casting. Even 3ft tall on a 6ft base of? is a large casting.<p>Maybe a hardwood frame covered with brass, copper or aluminum sheets. That still leaves the clock mechanizm to find. If the local High School shop class (Sept Oct) needs a p...

I check every new thread, every new post in threads I find interesting.<p>The kind of person you're looking for more likely reads Circuit Cellar Ink, hangs out at CircuitCellar forum (I read both, N&V and CCI are sufficiently different there's not much competition, so I think it's okay to mentio...

50-60Hz transformers may have a larger (heavier)core.<p>Wire gauge of the secondary winding(s) gives some indication of current capability.<p>Edd - I think your 10% voltage drop test would give a more realistic continous rating for Radio Shack transformers too! The RS transformers are okay, but the ...

One reason Mike would need to regulate the voltage, is if one of the ICs in the amp has a max power supply voltage rating of +-15V.<p>I just downloaded the spec sheet for the Burr-Brown OPA549. It says 60V single supply, +-30V dual supply. So, if that is the only type IC, and the unregulated supply ...

What is the impedance of the speaker?<p>Is the speaker hookup signal and ground, or signal and inverted signal?

Pin 1 (13) is discharge. The 10uF cap charges thru the left 1N914. When discharge transistor turns on, the current goes thru the right diode. The 1K resistor limits the current if the 100K pot is all the way right. The 100K pot adjusts ratio of on to off time.<p>Pin 5 goes to SSR and the 555. The 55...

Checked several pages on your web site. Looks to be usefull items at fair prices.<p>What I couldn't find in the documentation was what USB version you're using? USB 1.x or 2.x?

Don Lancaster's site is: www.tinaja.com

Nice indeed. I was thinking power NPN emitter follower after the 7815. The problem that is regulation is poorer because of the base-emitter is between the 7815 and the output, and the 7815 must supply the base current.<p>In the link given by Externet, using PNPs solves both problems. The emitters an...

TA

Water for the ice maker is tapped off before filter????????? Or the filtered water tastes bad after being frozen???????<p>Experiment: Put filtered tap water in ice cube trays and freeze. Does it still taste bad?

bodgy, this is a question, repeat question,<p>How does water on the outside of the coax change the dialetric constant of the insulation between center conductor and shield on the inside?<p>If coax was driven balanced (neither center conductor nor shield grounded, or reversed (center conductor ground...

Curious, is sample rate on that pin 533000 samples per second?