Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 17, 2014 12:30AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 17, 2014 02:21AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 17, 2014 02:29AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 17, 2014 03:16AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 17, 2014 04:26AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 17, 2014 05:36AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 17, 2014 05:49AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 17, 2014 05:50AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 17, 2014 06:02AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 17, 2014 07:12AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 17, 2014 07:39AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 17, 2014 04:32PM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 17, 2014 06:08PM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 02:58AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 04:24AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 05:38AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 08:35AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 09:27AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 10:26AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 11:39AM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 01:37PM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 02:32PM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 02:43PM |
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Quote
dc42
Looks like I may be up to 50 orders soon, in which case I can probably afford to get them assembled professionally!
Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 03:00PM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 03:09PM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 05:54PM |
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Quote
dc42
Hi DanV, I will release the schematic when I ship the first units. I don't want to buy parts for 50 kits and then have lots of orders cancelled because someone else rushes the design out. I don't have bandpass filtering on the output of the IR sensor (because I don't believe it is needed), I just have a minimal high-pass filter. Currently my Ormerod uses a modulated sensor with the modulation done by the Duet at about 83Hz, and this is performing well. It shows a very slight sensitivity to very strong incandescent lighting, due to 50Hz modulation in the light I believe. The board I have designed will modulate the IR at 1kHz or higher, which allows the mcu to average out the signal over at least 12 times more cycles and should reduce the sensitivity to 50Hz. Ideally we would sample over a complete number of 50Hz or 60Hz mains cycles, however this would slow down the response time too much.
Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 06:19PM |
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Re: Anyone interested in a modulated IR sensor + fan control + illumination board? February 18, 2014 06:26PM |
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