Gegevens van gebruiker Freddy
| Naam: | Freddy |
| Aangemeld op: | 24 okt 2007 |
| Status | Lid |
| E-mail: | niet openbaar |
| Website: | meettechniek.info |
| Bedrijf: | |
| Adres: | |
| PC Plaats: | |
| Land: | |
| Telefoon: | |
| Opmerkingen: | I'm the owner of meettechniek.info. I founded this site because I noteced that many people didn't know how to perform measurements correctly. By writing articles about this subject I hope to spread knowledge and create awareness about this subject. |
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Reacties van Freddy
| Datum | Artikel | Reactie |
| 30 nov 2020 16:03:07 |
Fast Lux meter | Yes, the BPW34 is more sensitive, but its spectrum lays more in the near infrared region and does not represents the human eye. |
| 24 sep 2020 09:04:09 |
Arduino wattmeter | You don't have to modify the circuit. The wattmeter can measure negative voltages. Connect the current measure side so it measures also negative. The resul ... |
| 30 aug 2020 10:08:02 |
Additive synthese waveform generator | It is all in one JS file. Only the HTML elements are marked-up in this HTML file. And you can find the style descriptions in golfvormsynthese.css |
| 29 aug 2020 20:13:16 |
Additive synthese waveform generator | It is not open source, but you may use it for educational purposes. You can find the link to the javascript source (golfvormsynthese.js) in the HTML source code ... |
| 06 maa 2020 20:42:01 |
Arduino wattmeter | @Matt, You can monitor the (dis)charging at the battery as you wishes within the accuracy limits described in the article. To reduce the power consumption yo m ... |
| 06 maa 2020 20:26:16 |
Arduino wattmeter | @Raju, I'm sorry. To convert the code to another system is something to figure it out yourself. I don't have the time for it. Sorry. |
| 06 maa 2020 20:21:34 |
Arduino wattmeter | @Milli, No, 1024 is correct, that is the number which the reference must be divided by to get the step size. Suppose you have a reference voltage of 4 volt and ... |
| 04 feb 2020 11:27:37 |
Fast Lux meter | You can make the luxmeter less sensitive by lowering the value of R1. As An example: halving the resistance value dubbles the maximum range. And if you only int ... |
| 03 feb 2020 16:52:37 |
Fast Lux meter | The power supply voltage must be at least 12 V and may never exeed the OP37 absolute maximum rating of 22 V. The output voltage lays between 0 volt @ 0 lux, and ... |
| 28 jan 2020 10:07:03 |
Shuntweerstanden | Als ik mij niet vergis is die maximale aardweerstand van 166 Ω de weerstand van de hele keten, incl. de weerstand van de aardpin naar de grond. Je kunt du ... |
| 24 jan 2020 21:05:33 |
Shuntweerstanden | Draaispoelmeters zijn niet geschikt om wisselstroom te meten. Beter is het om een multimeter te gebruiken. Maar omdat de stroombereiken vaak beveiligd zijn met ... |
| 23 jan 2020 23:24:18 |
Shuntweerstanden | Ik heb net een 200 A stroomtrafo getest, maar deze blijken toch een grote meetfout te hebben bij kleine stromen. En stroomtrafo's voor kleine stromen zijn ... |
| 22 jan 2020 12:25:08 |
Shuntweerstanden | Met een stroomtransformatoren voor grotere stromen kun je ook kleine stromen goed meten. Dus een 5 of 10 A type is ook geschikt. Wel belangrijk is de transforma ... |
| 21 jan 2020 21:26:00 |
Shuntweerstanden | Je mag de aardedraad onder geen enkele omstandigheid onderbreken of er iets anders tussenzetten. Wel zou je een stroomtrafo om de aardedraad kunnen leggen en da ... |
| 24 sep 2019 21:35:52 |
Additive synthese waveform generator | No, you didn't use this app wrong, it was a build in feature in the wave generating software. The standard way to generate the audio waveform was to normal ... |
| 24 sep 2019 20:22:49 |
Meetnauwkeurigheid | Het artikel is reeds geupdate met met het kwadratisch optellen van meettoleranties. De berekening met betrekking tot de totale fout uit de acuracy en reading wa ... |
| 22 apr 2019 12:12:59 |
Measuring capacitance and ESR | Yes, it is certainly possible to determen the distance of the plates by measuring the capacitance. But be aware that the capacitance is very small: at a distanc ... |
| 19 feb 2019 16:20:21 |
Magnetic permeability | 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 u ... |
| 15 feb 2019 00:20:07 |
Magnetic permeability | What are the measured values: current and voltage? Has the core an air gap? |
| 10 feb 2019 21:46:48 |
Additive synthese waveform generator | 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 ... |
| 09 feb 2019 22:16:01 |
Additive synthese waveform generator | 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 ... |
| 05 feb 2019 10:01:45 |
Additive synthese waveform generator | I think i've fixed the problem. Chrome introduced last december a new auto play policy: Audio on a web page must be manually started by user interaction. I ... |
| 05 feb 2019 09:32:37 |
Additive synthese waveform generator | Hello Bing, Indeed, it looks like the sound is not working anymore in Chrome. Other browser (Firefox, Opera, Edge) i've tested quickly work still fine. I ... |
| 10 jan 2019 11:58:59 |
Arduino wattmeter | Hey Tommy, an inverting amplifier was easier to implement. To get the signal back with normal polarity, the digitized value must only be inverted once more. It ... |
| 27 dec 2018 12:50:07 |
Additive synthese waveform generator | greenNights, never seen so much negativity in one comment. Is everything all right? I don't see how stereo can improve this demonstration. The code is wri ... |