Tuesday, 26 August 2014

[Electronics_101] Re: L.C. Checker Test Components Suggestions Needed

 

 

You know the frequency range of your signal source.  That's a constant.

 

You know the equation for the resonant frequency (1/(2*pi*sqrt(LC)) so build up a spreadsheet. 

 

Pick an L, you have the frequency range, calculate a lower and upper limit for C based on that range (or some percentage of the range).  Pick a C, calculate an upper and lower limit for L.

 

Ordinarily, things like volts/division on a scope are selected in a 1-2-5 (10-20-50) arrangement of values.  I prefer neat numbers like 1 uF, 10 uF, 100 mH, etc.

 

Remember, in the equation, L is in Henrys and C is in Farads.  Frequency is in Hz.  I wouldn't go too low in Hz because it will be hard to see on a scope.  1 Hz would be truly grim.  I might stay at or above 1 kHz.  I guess it would depend on what the spreadsheet turned up.

 

Richard


 

__._,_.___
Posted by: rstofer@pacbell.net
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (5)
Please trim excess when replying

.

__,_._,___
Posted by at No comments:

[Electronics_101] Re: L.C. Checker Test Components Suggestions Needed

 

Hello

The guy at Radio Shack said tantalum capacitors are exceptionally good for this sort of task.

Ideas??

Regards


Patrick


p.s. NOTE: NO TYPO CHECK WAS DONE HERE; please forgive any that are present.

__._,_.___
Posted by: vw_beetle_fix_it@yahoo.com
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (4)
Please trim excess when replying

.

__,_._,___
Posted by at No comments:

[Electronics_101] HELP!! L.C. Checker Test Components Suggestions Needed

 

Hello Stefan

Thanks. I thought something like that would be going on.

I'm looking for "standard" value inductors to feed known values into my LC Checker. Hopefully they can be had (exist??) or at least estimated.

Does anyone else have an idea about "standard value inductors"??

Regards


Patrick


p.s. NOTE: NO TYPO CHECK WAS DONE HERE; please forgive any that are present.

-------------------------






Hello

I'm going to order a small assortment of known value components for my "L.C. Checker V2" to make sure it's more or less correct in its readings.


I have a good assortment of capacitors here...(though none are of high tolerance) which I think will do for capacitor side of the thing. If anyone thinks I should get a few precision capacitors (instead of relying my capacitors of unknown quality), please let me know.


The inductors are a different matter.


When it comes to unknown value inductors, would it be a valid statement to say that an "RF choke" will give the same reading as a "transformer type inductor"...when measured on the L.C. Checker?? Or would they be different??


And I need suggestions as to what other value(s) of inductor(s) to order to provide a good test range for the Checker...the only thing I've come up on my own is a 1 Henry inductor (for obvious reasons... 1 Henry should = 1 Henry ). What other values would be good for starters?


I'm going to accept the stated value of all components as 100% correct ...regardless of whatever tolerance may be given for that component; in other words, I'll accept a 1 Henry inductor as a 1 Henry inductor no matter what the stated tolerance is for that particular part.


Can anyone make recommendations as to other inductive and/or capacitive values?


Thanks To All


Patrick


p.s. NOTE: NO TYPO CHECK WAS DONE HERE; please forgive any that are present.


__._,_.___
Posted by: vw_beetle_fix_it@yahoo.com
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (3)
Please trim excess when replying

.

__,_._,___
Posted by at No comments:

Monday, 25 August 2014

Re: [Electronics_101] L.C. Checker Test Components Suggestions Needed

 

Inductance depends heavily on test frequency (and amplitude).
In fact an inductor, measured above it's resonant frequency, will behave like a capacitor.
You can see typical capacitor and inductor curves over frequency in the datasheets (or sometimes catalogs).

ST

On Sun, Aug 24, 2014 at 11:31 PM, vw_beetle_fix_it@yahoo.com [Electronics_101] <Electronics_101@yahoogroups.com> wrote:


Hello

I'm going to order a small assortment of known value components for my "L.C. Checker V2" to make sure it's more or less correct in its readings.


I have a good assortment of capacitors here...(though none are of high tolerance) which I think will do for capacitor side of the thing. If anyone thinks I should get a few precision capacitors (instead of relying my capacitors of unknown quality), please let me know.


The inductors are a different matter.


When it comes to unknown value inductors, would it be a valid statement to say that an "RF choke" will give the same reading as a "transformer type inductor"...when measured on the L.C. Checker?? Or would they be different??


And I need suggestions as to what other value(s) of inductor(s) to order to provide a good test range for the Checker...the only thing I've come up on my own is a 1 Henry inductor (for obvious reasons... 1 Henry should = 1 Henry ). What other values would be good for starters?


I'm going to accept the stated value of all components as 100% correct ...regardless of whatever tolerance may be given for that component; in other words, I'll accept a 1 Henry inductor as a 1 Henry inductor no matter what the stated tolerance is for that particular part.


Can anyone make recommendations as to other inductive and/or capacitive values?


Thanks To All


Patrick


p.s. NOTE: NO TYPO CHECK WAS DONE HERE; please forgive any that are present.




__._,_.___
Posted by: Stefan Trethan <stefan_trethan@gmx.at>
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (2)
Please trim excess when replying

.

__,_._,___
Posted by at No comments:

[Electronics_101] Re: L.C. Checker Test Components Suggestions Needed

 

Hello

I'm going to order a small assortment of known value components for my "L.C. Checker V2" to make sure it's more or less correct in its readings.


I have a good assortment of capacitors here...(though none are of high tolerance) which I think will do for capacitor side of the thing. If anyone thinks I should get a few precision capacitors (instead of relying my capacitors of unknown quality), please let me know.


The inductors are a different matter.


When it comes to unknown value inductors, would it be a valid statement to say that an "RF choke" will give the same reading as a "transformer type inductor"...when measured on the L.C. Checker?? Or would they be different??


And I need suggestions as to what other value(s) of inductor(s) to order to provide a good test range for the Checker...the only thing I've come up on my own is a 1 Henry inductor (for obvious reasons... 1 Henry should = 1 Henry ). What other values would be good for starters?


I'm going to accept the stated value of all components as 100% correct ...regardless of whatever tolerance may be given for that component; in other words, I'll accept a 1 Henry inductor as a 1 Henry inductor no matter what the stated tolerance is for that particular part.


Can anyone make recommendations as to other inductive and/or capacitive values?


Thanks To All


Patrick


p.s. NOTE: NO TYPO CHECK WAS DONE HERE; please forgive any that are present.

__._,_.___
Posted by: vw_beetle_fix_it@yahoo.com
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (2)
Please trim excess when replying

.

__,_._,___
Posted by at No comments:

Sunday, 24 August 2014

[Electronics_101] L.C. Checker Test Components Suggestions Needed

 

Hello

I'm going to order a small assortment of known value components for my "L.C. Checker V2" to make sure it's more or less correct in its readings.


I have a good assortment of capacitors here...(though none are of high tolerance) which I think will do for capacitor side of the thing. If anyone thinks I should get a few precision capacitors (instead of relying my capacitors of unknown quality), please let me know.


The inductors are a different matter.


When it comes to unknown value inductors, would it be a valid statement to say that an "RF choke" will give the same reading as a "transformer type inductor"...when measured on the L.C. Checker?? Or would they be different??


And I need suggestions as to what other value(s) of inductor(s) to order to provide a good test range for the Checker...the only thing I've come up on my own is a 1 Henry inductor (for obvious reasons... 1 Henry should = 1 Henry ). What other values would be good for starters?


I'm going to accept the stated value of all components as 100% correct ...regardless of whatever tolerance may be given for that component; in other words, I'll accept a 1 Henry inductor as a 1 Henry inductor no matter what the stated tolerance is for that particular part.


Can anyone make recommendations as to other inductive and/or capacitive values?


Thanks To All


Patrick


p.s. NOTE: NO TYPO CHECK WAS DONE HERE; please forgive any that are present.

__._,_.___
Posted by: vw_beetle_fix_it@yahoo.com
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (1)
Please trim excess when replying

.

__,_._,___
Posted by at No comments:

Sunday, 3 August 2014

[multimachine] help test please

 

hi
i have the idea to turn any electric motor into an exponential one
1) fix the stator on a axe same as the rotor but the other side of the stator
2) fix the µc and the battery to it
3) fix a gearing to it to make the rotor turn it with 1/10 of the
speed in the same direction
4) fix a bearing to it
5) turn it on
don't try to patent ;)
can i see it in action ?
i'm not able to work with my hand
thanks

__._,_.___
Posted by: Christophe Malvasio <arsdmthe@gmail.com>
Reply via web post • Reply to sender • Reply to group • Start a New Topic • Messages in this topic (1)
-------------
We have a sister site for files and pictures dedicated to concrete machine framed machine tools. You will find a great deal of information about concrete based machines and the inventor of the concrete frame lathe, Lucian Ingraham Yeomans. Go to http://groups.yahoo.com/group/Multimachine-Concrete-Machine-Tools/

Also visit the Joseph V. Romig group for even more concrete tool construction, shop notes, stories, and wisdom from the early 20th Century.
http://tech.groups.yahoo.com/group/romig_designs/
-------------

.

__,_._,___
Posted by at No comments:
Subscribe to: Comments (Atom)