I didnt expect it to work so well A design by Phil Rice VK3BHR Available in Different Languages on the web Author Language amp Web Site Marek SP7DQR Polish httpsp7dqrwawpllcmeterplhtml ID: 417043
Download Presentation The PPT/PDF document "A Surprisingly Accurate Digital LC Meter" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
A Surprisingly Accurate Digital LC Meter”I didn't expect it to work so well!”
A design by
Phil Rice
VK3BHRSlide2
Available in Different Languages on the web.
Author Language & Web Site
Marek
SP7DQR Polish
http://sp7dqr.waw.pl/lcmeter_pl.html
Aleksandr
Buyevskiy
Russian
http://www.cqham.ru/lc_meter.phtml
Patrick TK5EP French
http://tk5ep.free.fr/tech/lcmeter/fr/lcmetre_f.php
Volker SM5ZBS German
http://www.janson-soft.de/lcmeter/lcmeter.htmSlide3
FeaturesPic Based design with software calibration.
http://en.wikipedia.org/wiki/PIC_microcontroller
Low Part Count.
Simple to use.
Battery Powered.
Locally available parts.
Claimed
measuring
range:
Capacitors - 0.0pF to about
0.1uF
Inductors - 0.0uH to somewhere over
10mH
All
Thourgh
Hole and NO SUFACE MOUNT
Slide4
Claimed measuring rangeSmall measurements are inaccurate, because of quantising
error.
Capacitors - 0.0pF to about 0.1uF
Inductors - 0.0uH to somewhere over 10mHSlide5
The Mathematicsbehind the scenes.Slide6
Parallel LC oscillator& Frequency Meter
Origional
DesignSlide7
Improved Version 2https://sites.google.com/site/vk3bhr/home/index2-htmlSlide8
It differs from the original in that:A 16F628 PIC is used. This has internal comparator, which means the LM311 is no longer needed.
Software calibration is used. The finished meter can be calibrated against "any" accurate capacitor within the range 100pF to about 10000pF.Slide9
Component LayoutSlide10
Variations in ArtworkSlide11
http://kc7zow.tripod.com/hamradio/id8.htmlSlide12
http://f6bon.albert.free.fr/LCMETER2.pdfSlide13
Variations in SchematicsSlide14
http://www.aade.com/manuals/lcm2b%20kit.pdfSlide15
http://f6bon.albert.free.fr/lcsch.pdfSlide16
Variations in ImplementationSlide17
http://kc7zow.tripod.com/hamradio/id8.htmlSlide18
http://www.aade.com/lcmeter.htmSlide19
http://py2wm.qsl.br/LC_meter/LC_meter-e.htmlSlide20
http://f6bon.albert.free.fr/lcmetre.htmlSlide21
http://www.pi4zlb.nl/Zelfbouw/LC-meter.htmlSlide22
http://xavier.fenard.free.fr/LCMeter.htmSlide23
http://electronics-diy.com/lc_meter.phpSlide24
http://www.marc.org.au/Slide25
http://py2wm.qsl.br/Gravador_PIC/pic-programmer.htmlSlide26
Build ProcessRedrew schematic in ExpressPCB with Mouser Part numbers.
Redrew layout with changes for new parts.
Extracted Bill of Materials from the schematic.
Upload to Mouser and make any changes for items you have.
Print PCB layout and etch the circuit board (Iron on process).
http://www.staples.com/Staples-Color-Laser-Paper-Glossy-8-1-2-inch-x-11-inch/product_633215
This is still a work in progress…Slide27
Express PCB SchematicSlide28
Express PCB LayoutSlide29
Bill of MaterialsSlide30
Front Panel Artwork& Drilling TemplateSlide31
Board by Chris Hood, KE5SBPSlide32
Completed Board and DisplaySlide33
Drilled Case and Mounting Hdw.Slide34Slide35
Completed Meter