T&L Publications

yigiter:<p>Yes. You can easily operate your current regulator (current source) circuit anywhere in the load circuit by giving the current source circuit it's own ISOLATED +5V, 0V, and -5V power supply.<p>Say your load is grounded (connected to the negative terminal of the battery shown in my diagram...

Thanks toejam and all other contributors.<p>I think I have enough now to setup and run the next round of writing experiments with focus on picking an imaginary target audience, keeping my technical focus very tight to a specific question per article, outlining to spell out what I want to achieve wit...

Thanks to haclesup and Enzo:<p>A strangely provocative comment: I can do outlining backwards.<p> This is progress towards putting an outline together that will work for writing an article for other people.<p>The hint here (looking also at Enzo's thinking) seems to be that a fraction of what has been...

Thanks Enzo:<p>Several things leap out from your post:<p>1) "An outline is nothing more than a description of what you intend to do." This seems to be relating focus and outline. I'll let it "soak in".<p>2) "Identify your audience." This, so far a real problem for me. I...

What does a diode and/or capacitor in parallel with a coil (inductor) do to snub (reduce) inductive "kick" noise?<p>There is usually no problem with noise associated with turning a coil on. The current in the coil gradually increases as inductive reactance decreases.<p>The coil "charg...

haklesup:<p>My approach to developing analog power electronics seems to be evolving into a system that permits me to design and build something I need, doing something useful immediately, when I have been away from electronics for a long time and am coming up from "cold".<p>Conceptual simp...

yigiter:<p>I've posted an answer to your question in the "current source" thread initiated by rosborne.<p>If you have more specifics about your application I might be able to tighten the design for you a bit.<p>Good luck with your project. Enjoy.

yigiter continued after modem dropout. Sorry:<p>3)And the parallel current controllers approach often allows me to dodge the need for expensive heatsinks. Usually opamps and transistors are MUCH cheaper than heatsinks and the transistors can be compactly mounted off-board. This eliminates need to us...

yigiter:<p>If you wish to use Re = 0.5 ohms and you want 0-2A out and you wish to use a single op amp and a single transistor, you can make this work.<p>Vin = Ic * Re, so for 2V out you would have Vin = 1V.<p>You will probably want to use a darlington transistor so the opamp will put out enough base...

OK. I get part of the picture: A 90V DC motor controller running off AC power is just a 10 AMP dimmer switch. If I wanted RPM control as well, I would just add a simple feedback circuit to modify the dimmer switch control output. So, development would not involve me in much non-rational creative hea...

hacklesup:<p>The notion of completing a 150 page manual in a week is IMPRESSIVE. At my present skill level, I would need two years to make a mess of it and would wind up with 1000 pages.<p>Outlining as a strategy for effectiveness and efficieny in writing is a scheme I've seen mentioned before. And ...

I've been thinking about your 90V DC motor controller project mentioned in your contribution to the "rookie writer" thread.<p>I've found these in an old Grainger catalog and am trying to understand why you might want to build rather than buy.<p>The catalog does say that these controllers a...

wd5gnr (Al Williams):<p>I've printed a copy of your piece "So You Want to Write Magazine Articles" for study.<p>Your notions on FOCUS and saying very early what the article is about seem to be grabbing my attention as relevant to my difficulties just now.<p>Thanks.<p>Fred Denis

haklesup:<p>There is good stuff here in your comments.<p>Writing a full book is beyond my capabilites as a writer just now. I need to practice on much smaller projects for a while until:<p>1) I quit getting lost in complexity, losing focus, and being forced to quit.<p>2) I quit "elephantiasis&q...

Chris Smith:<p>I don't seem to be able to see the edit icon you described. Is "here" the post reply page? I would find this edit feature useful. I'll keep looking for it.<p>Thanks.<p>OK. I found the edit icon on far right of each forum entry in the displayed thread pages. This is an experi...