Comment summary #6
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Comment 51 ... 60
| date | article | author | comment |
| 29 aug 2020 20:13:16 | Additive synthese waveform generator | Freddy | 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 of this page. |
| 29 aug 2020 15:44:52 | Additive synthese waveform generator | Subrata | Hi Absolutely loved your work, I was just wondering is this code open open source for young learner at uni? If so how can then I access the source code (the application), I would like to add something extra and to combine few tools for audio engineering students in UK, as for educational and research purpose only. Wold like to hear from you at your convenience. Kind Regards Subrata |
| 06 maa 2020 23:09:19 | Arduino wattmeter | Matt | Thank you. :) |
| 06 maa 2020 20:42:01 | Arduino wattmeter | Freddy | @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 may remove the LCD. I don't know in how far the power consumption can be reduced. Remember that the ADC has to run continuously to detect spikes. Just experiment with it. Succes! |
| 06 maa 2020 20:26:16 | Arduino wattmeter | Freddy | @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 | Freddy | @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 a 2 bit ADC (4 discrete levels), then each step is 4V/4=1 volt. level 0 = 0.0 till 1.0 level 1 = 1.0 till 2.0 level 2 = 2.0 till 3.0 level 3 = 3.0 till 4.0 |
| 06 maa 2020 19:50:16 | Arduino wattmeter | Milli | "The conversion from the raw ADC-values to the real voltage and current values is done with a scale factor: For voltages this is Vscale = ADCsense * Vdiv, and for current Cscale = ADCsense * Cdiv. ADCsense is the ADC sensitivity: 1.1 V / 1024." 1024 is wrong! Use 1023 and you get a correct conversion! A 10 bit converter can do only 1023 steps (that are, including 0, 1024 states) Step 1024 will be the 11th bit you not have! Try it with a 2 or 3 bit converter example, please! |
| 02 maa 2020 11:13:08 | Arduino wattmeter | Raju | Hi Freddy, How to upgrade with Bluepill board, to get 12bit adc resolution (STM32F103C8T6) |
| 02 maa 2020 09:22:23 | Arduino wattmeter | Matt | Hi Freddy, I hope you are still monitoring this comment thread. :) I would like to monitor power usage and charging on a remote 12V system with a solar panel and some intermittent loads, with data logging. I have two questions: 1. Would this circuit be suitable for accurately measuring consumption and/or charge (net energy use) in a DC system by connecting it at the battery so it sees all charging and drain as positive and negative current, then modifying the software? 2. I would like to reduce the power usage of the meter as much as possible. I am thinking to remove the LCD display; log data to an SD card or similar and retrieve it via serial connection to another system twice daily; simplify the rate and variety of measurements to only average voltage, current and total Ah per 30sec interval or so. Would this circuit be a good basis for experiments in that direction, and how low do you think the power usage could realistically reach? Many thanks, Matt |
| 04 feb 2020 11:27:37 | Fast Lux meter | Freddy | 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 interested in the flash-waveform shape, you can measure it indirectly by pointing the luxmeter to a wall or another (darker) surface. |