T&L Publications

I found an excellent discussion on power factor correction at http://www.lmphotonics.com/pwrfact.htm<p>Ron

Billdar said what I was in the process of composing, but I'll throw in my (additional) two cents anyway.<p>Magnetic fields are created by moving charges. If the charges are static, there is no associated electromagnetic (EM) field - only an electrostatic one. Do a Google search for "electrostat...

Looking at a datasheet from TI,<p> http://www-s.ti.com/sc/psheets/slos365a/slos365a.pdf <p>there is an equation on page 8 that relates the loss in cooling ability to the ripple current. Higher ripple current yields lower cooling capability. Therefore, you should minimize ripple current (within reaso...

A pretty good explanation can be found at http://biz.howstuffworks.com/capacitor.htm <p>However, when Mr. Brain gets to the discussion of DC blocking (passing AC), he gets it partially wrong:<p>"A capacitor can block DC voltage. If you hook a small capacitor to a battery, then no current will f...

Newbie, you are right on. If you charge a perfect capacitor and open circuit it, the voltage will remain the same forever. If you charge a perfect inductor with a current and then short circuit it, the current will flow forever. Remember, the time constant of an RL circuit is L/R. If R is zero, the ...

"But they all oscillate, rotate, or gyrate, even Crystal, Kristal and Chrystal? "<p>As I recall, one of them did osculate. Sorta like oscillate, only different. <p>Ron

<snip>And, the "crystal" is a different animal from the "crystal" in "crystal oscillator". There may another Crystal that's different. Ever date her in your youth, Ron?<unsnip><p>I think she spelled it "Kristal". Or was it "Chrystal"?<p>Earphone crys...

Your circuit description is indecipherable. Why don't you post the URL of the schematic?

You can get crystal earplugs for $2.50 each from http://www.midnightscience.com/ <p>The above URL is the home page for The Xtal Set Society. I purposely left off the address for the catalog, but you can easily find it from the home page.<p>I cut my teeth on crystal radios many years ago, and I still...

On the outside chance that Edd's solution doesn't meet your needs, you could adapt this design:<p> http://www.glass-ware.com/tubecircuits/High_Voltage_Regulator.html <p>For 100 volts output, change the sum of R2 and R3 from 295k to 95k, and lower the unregulated HV DC supply to around 130 volts.<p>R...

You can buy back issues. Go to http://www.nutsvolts.com/backissue.htm<p>Ron H

Dean wrote:<p>"In Oklahoma City, it averaged to around 13 blocks per mile. Oklahoma City is one of the few cities where danged near every street runs either east-west or north-south, so there're no curves to skew the block count and the entire area is set up with section roads. In Oklahoma, it'...

Go to http://www.poptronics.com/forums/electronic_bench/ and see the post entitled "Invert and Level Shift". A simplified schematic is posted there.<p>Ron H

The spec you are looking for is V(BR)DSS. The datasheet says 100 volts, so you should be OK. I haven't seen the article, but I'm assuming the gate is driven by a 5 volt logic level. The IRL540 cannot take more than 10 volts gate-to-source.<p>Ron H

Here is a pretty good explanation of GFCI operation:
http://www.codecheck.com/gfci_principal.htm<p>Ron H