A design by Phil Rice VK3BHR 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 Volker SM5ZBS German http://tk5ep.free.fr/tech/lcmeter/fr/lcmetre_f.php http://www.janson-soft.de/lcmeter/lcmeter.htm 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 Small measurements are inaccurate, because of quantising error. Capacitors - 0.0pF to about 0.1uF Inductors - 0.0uH to somewhere over 10mH Origional Design 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. 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…