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Sci.Electronics.Basics
Sci.Electronics.Basics is a worldwide Usenet news group that is used to discuss basic electronics questions.
There are 4775 threads in our archives.
You are looking at page 6 of 478.
The threads with the newest articles are listed first.
flashlight circuit [10 articles]
rabbit killer - 2010-07-31 03:54:00
why the hell does my flashlight go dim, but when I knock it hard it gets
bright again? What can I do to fix this? I don't understand what's going
on here...
...
Ohms law power problem [39 articles]
Bill Bowden - 2010-07-29 12:22:00
Using a 12 ohm load and 12 volt supply, what is the power gain when
the voltage is raised to 12.1 volts?
Considering the formula P=E^2/R the power at 12 volts will be 144/12 =
12 watts. And, at 1...Destructive Testing On SPICE [11 articles]
Bret Cahill - 2010-07-28 16:28:00
Is there any circuit simulator that accounts for overload and failure
of components?
Bret Cahill
...TEKTRONIX 5403/D40 Oscilloscope -- Does It Work?
W. eWatson - 2010-07-26 20:15:00
I bought a used Subject scope 10 years ago and really never used it,
except to try it for simple tasks. It was probably beyond what I needed,
but I knew the seller and the price was right. Time to...Surge Protector - how they work? [10 articles]
Kari Laine - 2010-07-24 04:06:00
Hi,
it is the thunder season here in Finland so I got interested how these
surge protectors are built - which say they will save you hardware from
spikes - yeah....
Are there avalanche diodes ...Solder flux and resistance [7 articles]
George Herold - 2010-07-23 22:50:00
When testing a high impedance board (up to 1 G ohm) I found that the
SMD 0805 10 Meg ohm resistors measured only 6 meg ohm. The problem
was traced back to the liquid flux used with Rohs solder. ...need some help designing a Sinewave inverter [15 articles]
tmpstr - 2010-07-23 07:14:00
I would like to build a pure sinewave inverter and need some help in
designing & component selection.
What ?
A 100-200 Watts, 230 V pure sinewave inverter
Input: preferably one 12V SMF battery....Toner transfer Paper-update [11 articles]
Hammy - 2010-07-23 01:59:00
A while ago their was a thread about paper used for PCB toner transfer
method using a laser toner.
The main grudge with using the recommended staples picture paper that
Goatee recommends was diff...Boost converter, inductor size? [40 articles]
Bill Bowden - 2010-07-23 00:58:00
I have a DIY solar panel that delivers 9.65 volts (24 cells) at about
1 amp and need a boost converter (12-14) to charge a SLA battery. I
want to use a air core inductor (30-60uH) to avoid special f...microwave [10 articles]
RC - 2010-07-22 18:24:00
why microwave applications need devices with negative resistance?
...