I have updated the website, and the software ,AND the hardware.
As promised I wrote a Linux program that does the calculations on the PC, extending the measurement range to > 1 H and > 1 uF. The source code is in C, and it is included in the tgz archive on the site. It is released under GPL license, but the parsing and calculation part is released freely into the public domain. You can see from that how to parse the output or use it in any way you want.
The calibration switch is no longer needed, hitting the space bar in the software will start calibration. You can still use LC pic with a terminal too, but now the baud rate is set to
9600 Bd. For me I consider this project finished.Some remarks about measuring huge inductors (1H etc), you may get a too big reading. this is because these coils often have considerable capacitance between the layers, lowering the oscillator frequency more than if it was a pure L. For example I had one 390 mH measure as 430 mH, and 2 in series as 1 H. LOL
And for capacitors, it measures a Siemens MKL 1uF / 100V as exactly 1 uF, but a MKH +/-10% as 830 nF.. Measuring some 1 uF electrolytic shows 800 some nF, and measuring a very old 100 uF shows nF... That one probably has some high losses (30 years old cap), so you may get fooled. I still have to measure some tantalums, should be better.
Overall it is a great gadget to have!