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| date | article | author | comment |
| 21 apr 2019 01:46:35 | Measuring capacitance and ESR | Daniel | I'd like to measure the distance of two narrow metallic plates with size around 1cm^2 and 1cm^2 at a frequency of at least 100Hz, preferably rather around 1-10 kHz. I think measuring the capacity is the best way to measure the distance. (I have a good microscope to measure the precise distance, but is is very slow. However, it is suitable to calibrate a fast method.) Which of these method do you suggest to measure the capacity? Or none of them? |
| 19 feb 2019 16:20:21 | Magnetic permeability | Freddy | First you say you're changing the core material, now you say the material is (and stays?) air?. And why would you measure the permability of air? Are you using the circuits and calculations given in this article? |
| 19 feb 2019 15:26:43 | Magnetic permeability | Costa | I'm measuring voltage, the core is air, the inductance of coil is 90uH with air in the core, should i build a coil with higher inductance? |
| 15 feb 2019 00:20:07 | Magnetic permeability | Freddy | What are the measured values: current and voltage? Has the core an air gap? |
| 14 feb 2019 15:17:51 | Magnetic permeability | Costa | Hi, thank you for this excelent article. i built this circuit with a resistor ( 10-100 ohms ) and a inductor, with a frequency of 100hz to 500 khz. I changed the core material but the voltage of a inductor didn't vary for any frequency. what can i do? |
| 11 feb 2019 15:47:40 | Additive synthese waveform generator | Bing | Version 71.0.3578.98 (Official Build) (64-bit) This is the chrome version I have. It's a work laptop. I don't think I can update it. :-( It's working now. :-) |
| 11 feb 2019 15:40:27 | Additive synthese waveform generator | Bing | Freddy, This worked on chrome last Sunday, but now it is not working again. Could you please check if the new code is removed by accident. My school issued laptop only has chrome and explorer. Thank you, Bing |
| 10 feb 2019 21:46:48 | Additive synthese waveform generator | Freddy | The latest code is still there. What Chrome version are you using. I have version 72.0.3626.96 (Official build) (64-bits). Did you refresh the page as suggested? |
| 10 feb 2019 14:30:24 | Additive synthese waveform generator | Bing | Freddy, This worked on chrome last Sunday, but now it is not working again. Could you please check if the new code is removed by accident. My school issued laptop only has chrome and explorer. Thank you, Bing |
| 09 feb 2019 22:16:01 | Additive synthese waveform generator | Freddy | Hoi Bing, still works fine here. You could try to refresh the page <F5> or if that doesn't work <Ctrl+F5>. Let me know if this solves the issue. |