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A Surprisingly Accurate Digital LC Meter ”I didn't expect it to work so well!”

A Surprisingly Accurate Digital LC Meter ”I didn't expect it to work so well!”. A design by Phil Rice VK3BHR. Available in Different Languages on the web. Author Language & Web Site Marek SP7DQR Polish http://sp7dqr.waw.pl/lcmeter_pl.html

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A Surprisingly Accurate Digital LC Meter ”I didn't expect it to work so well!”

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  1. A Surprisingly Accurate Digital LC Meter”I didn't expect it to work so well!” A design by Phil Rice VK3BHR

  2. Available in Different Languages on the web. • Author Language & Web Site • Marek SP7DQR Polish http://sp7dqr.waw.pl/lcmeter_pl.html • AleksandrBuyevskiy 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.htm

  3. Features Pic 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 

  4. Claimed measuring range Small measurements are inaccurate, because of quantising error. Capacitors - 0.0pF to about 0.1uF Inductors - 0.0uH to somewhere over 10mH

  5. The Mathematicsbehind the scenes.

  6. Parallel LC oscillator& Frequency Meter Origional Design

  7. Improved Version 2https://sites.google.com/site/vk3bhr/home/index2-html

  8. 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.

  9. Component Layout

  10. Variations in Artwork

  11. http://kc7zow.tripod.com/hamradio/id8.html

  12. http://f6bon.albert.free.fr/LCMETER2.pdf

  13. Variations in Schematics

  14. http://www.aade.com/manuals/lcm2b%20kit.pdf

  15. http://f6bon.albert.free.fr/lcsch.pdf

  16. Variations in Implementation

  17. http://kc7zow.tripod.com/hamradio/id8.html

  18. http://www.aade.com/lcmeter.htm

  19. http://py2wm.qsl.br/LC_meter/LC_meter-e.html

  20. http://f6bon.albert.free.fr/lcmetre.html

  21. http://www.pi4zlb.nl/Zelfbouw/LC-meter.html

  22. http://xavier.fenard.free.fr/LCMeter.htm

  23. http://electronics-diy.com/lc_meter.php

  24. http://www.marc.org.au/

  25. http://py2wm.qsl.br/Gravador_PIC/pic-programmer.html

  26. Build Process Redrew 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…

  27. Express PCB Schematic

  28. Express PCB Layout

  29. Bill of Materials

  30. Front Panel Artwork& Drilling Template

  31. Board by Chris Hood, KE5SBP

  32. Completed Board and Display

  33. Drilled Case and Mounting Hdw.

  34. Completed Meter

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