LC meter that only measures capacitors

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Re: LC meter

mvs sarma said:
@ Karesz,
if you see the circuit uploaded by sanjubluerock3, the relay Calibhas a diode across the coil as it is expected to be operated by the transistor. Perhaps other one it is not needed as it is manually switched. Hope, this clarifies.
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Sorry; I can not agree with you, because for the inductance its really equal if you are switching it per transistor or a manual switch onto some potential!
The answer will exists in all cases as a voltage transient, with amlitude depending of parasitics & not from kind of physical realising: Tr or Manual switch....
I will not say that a serial resistor(if its real existent in the Meter) can not attenuat it, but a diode not to design into these circuit i for me clearly=a failure!
K.
 

Re: LC meter

Please try to make it work without loss of accuracy. it would be useful and you would have added a new dimension to the design.
all the best, karesz.

Added after 6 minutes:

the pcb designs uploaded were from me, and I gave to Sanjubluerock3.
originally i started with hand-wired board and it worked neatly.
Later i made the pcb as in silicon chip or EPEmag -both have published the design.
the board did not some how work for me. then i thought i would make one myself , it is the one you saw .
 

Re: LC meter

mvs sarma said:
Please try to make it work without loss of accuracy. it would be useful and you would have added a new dimension to the design.
all the best, karesz.
Click to expand...
Youu are nice_tnx!
But Im speaking not over L-C Meters accuracy, but over induced voltage of relays coil by switching it per hand switch or transistor .
I wish to finish these fruitless debate...
Greetings!
K.
 

Re: LC meter

Perhaps, one way you are correct, that, when we switch a relay on and later OFF , there would be spark across the switch contact that is wired on the coil.
After some number of operations the contact odd that switch fails. But with a diode in place, it would give much longer life for the contactof the switch.
 

Re: LC meter

Hi

The features are as follows:
- Measure inductance and capacitance.
- Auto ranging.
- Auto measure L or C.












Regards
Fragrance
 
LC meter

Fragrance - as always you seem to have uploaded a project you tried yourself

How good did it work?

Could you upload the whole Proteus schematic and source code also?
 

LC meter

Hi,
For me are the schematics not to open/see :-(...
K.
 

Re: LC meter

vsmGuy said:
Fragrance - as always you seem to have uploaded a project you tried yourself

How good did it work?

Could you upload the whole Proteus schematic and source code also?
Click to expand...

Yes I have made it on strip board nice tool for my work bench and very accurate actually all detial are Available on link gevin under i attached the source code file along with proteus design file.

The software was written in basic. I don't use floating point math. This is a great example showing how to use integers to do floating point math. This program is far from done.

https://www.campworld.net/thewiki/pmwiki.php/Electronics/LCMeter

Regards
Fragrance
 
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