OT: a great TV show if you like to tinker with stuff

Started by default in sci.electronics.basics4 months ago 11 replies

I'm watching this really interesting program from the BBC. It is called (James May) "The Reassembler." He takes everyday stuff, appliances and...

I'm watching this really interesting program from the BBC. It is called (James May) "The Reassembler." He takes everyday stuff, appliances and such, and takes them apart and reassembles them. He keeps a running commentary is intelligent, quick thinking, has a good vocabulary and has a great sense of humor/social awareness. You see him start with a table full of parts and he puts together (...


Taxation of Individuals and Business Entities, 7th (2016) ed test bank is available for $25 only for purchase by students and teachers. Please contact estudyguides[at]gmail.com to buy this product.

Started by Anonymous in sci.electronics.basics4 months ago

Taxation of Individuals and Business Entities, 7th (2016) ed test bank is available for $25 only for purchase by students and teachers. Please...

Taxation of Individuals and Business Entities, 7th (2016) ed test bank is available for $25 only for purchase by students and teachers. Please contact estudyguides[at]gmail.com to buy this product.


Real Estate Law Marianne J. Jennings 10th Ed Test bank is available for $25 only for purchase by students and teachers. Please contact estudyguides[at]gmail.com to buy this product.

Started by Anonymous in sci.electronics.basics4 months ago

Real Estate Law Marianne J. Jennings 10th Ed Test bank is available for $25 only for purchase by students and teachers. Please contact...

Real Estate Law Marianne J. Jennings 10th Ed Test bank is available for $25 only for purchase by students and teachers. Please contact estudyguides[at]gmail.com to buy this product.


Lind - Basic Statistics for Business & Economics - 7e Test bank is available for $25 only for purchase by students and teachers. Please contact estudyguides[at]gmail.com to buy this product.

Started by Anonymous in sci.electronics.basics4 months ago

Lind - Basic Statistics for Business & Economics - 7e Test bank is available for $25 only for purchase by students and teachers. Please contact...

Lind - Basic Statistics for Business & Economics - 7e Test bank is available for $25 only for purchase by students and teachers. Please contact estudyguides[at]gmail.com to buy this product.


connecting a VSD/VFD to an AC compressor

Started by default in sci.electronics.basics5 months ago 8 replies

I was wondering about using a Variable Speed AC Drive for two air conditioners. One is a window unit, with rotary compressor that uses single...

I was wondering about using a Variable Speed AC Drive for two air conditioners. One is a window unit, with rotary compressor that uses single phase with a capacitor to phase shift and three wires to the motor. Can this be made to run as a three phase motor without the cap? As far as I'm aware "inverter" (hvac-speak for VFD drive) aren't available for window units, in spite of their highe...


PID tuning. Lag = ~ integrating time

Started by George Herold in sci.electronics.basics5 months ago 38 replies

Hi all, this is not so much a question, as me just spouting. If I do say (spout) something wrong, or that you disagree with or that you don't...

Hi all, this is not so much a question, as me just spouting. If I do say (spout) something wrong, or that you disagree with or that you don't understand, then please do speak up. I've been tuning loops for years. (By tuning I mean picking some reasonable starting values, all loops IME need a little real time tweaking from the starting values.) I've always used the Zeigler-Nichols...


Variac question

Started by Anonymous in sci.electronics.basics5 months ago 16 replies

All, I have two variacs, one is the typical type that does not isolate the load from the mains. The other one I have isolates the load. When...

All, I have two variacs, one is the typical type that does not isolate the load from the mains. The other one I have isolates the load. When I use the isolated one to power an inductive load, like a transformer, the load really hums. The non-isolated variac does not do this. Anybody know? Thanks, Eric


What is a load line - intuitively

Started by veek in sci.electronics.basics5 months ago 10 replies

http://pix.toile-libre.org/?img=1493527288.png That's a typical graph of Vce vs Ic for a bunch of Ib as provided by the manufacturer. Is my...

http://pix.toile-libre.org/?img=1493527288.png That's a typical graph of Vce vs Ic for a bunch of Ib as provided by the manufacturer. Is my understanding correct: We create a loadline so that we can operate the transistor's collector ckt in a linear fashion for a varying base input. Basically there are an infinite set of Vce vs Ic curves for each and every base current value possib...


Transistor Hard Saturation - pg224 - Malvino

Started by veek in sci.electronics.basics5 months ago 2 replies

'A designer who wants a transistor to operate in the saturation region under all conditions often selects a base resistance that produces a...

'A designer who wants a transistor to operate in the saturation region under all conditions often selects a base resistance that produces a current gain of 10. ' http://pix.toile-libre.org/?img=1493526531.png http://pix.toile-libre.org/upload/original/1493526562.png I don't understand what he's doing with the math (it's not complicated math but he's trying to illustrate an idea that I...


one transistor amplifier help

Started by amdx in sci.electronics.basics5 months ago 32 replies

I have the following amp. It originally had a 12V supply voltage, In an effort to get a larger swing on the output, I raised that to 24V. ...

I have the following amp. It originally had a 12V supply voltage, In an effort to get a larger swing on the output, I raised that to 24V. I now get 12.5Vpp on the output, I want to maximize the output signal. A gain of 3 will work for my circuit. What changes can I make to maximize the output swing. The input is at maximum before distortion is seen. > https://www.dropbox.com/s/07j


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