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#1
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monitoring led indicator
I would like to monitor my washer and dryer using its indicator led lights.
Can this be done using breakbeam sensor ??? If so, can someone please provide me with schematic diagram how to build one. Thanks |
#2
Posted to alt.electronics
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monitoring led indicator
"Dani Reyes" wrote in message ... I would like to monitor my washer and dryer using its indicator led lights. Can this be done using breakbeam sensor ??? If so, can someone please provide me with schematic diagram how to build one. Thanks You need to more clearly describe what you want to accomplish i.e. monitor in what way. What do you mean by a breakbeam sensor? -- Dan Hollands 1120 S Creek Dr Webster NY 14580 585-872-2606 www.QuickScoreRace.com |
#3
Posted to alt.electronics
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monitoring led indicator
My washer and dryer have indicator led light labelled completed which turned
on after completing the washing or dryer process. I would like to use photoresistor to act as a swith that I can connect to a digital input. "Dan Hollands" wrote in message ... "Dani Reyes" wrote in message ... I would like to monitor my washer and dryer using its indicator led lights. Can this be done using breakbeam sensor ??? If so, can someone please provide me with schematic diagram how to build one. Thanks You need to more clearly describe what you want to accomplish i.e. monitor in what way. What do you mean by a breakbeam sensor? -- Dan Hollands 1120 S Creek Dr Webster NY 14580 585-872-2606 www.QuickScoreRace.com |
#4
Posted to alt.electronics
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monitoring led indicator
"Dani Reyes" wrote in message news My washer and dryer have indicator led light labelled completed which turned on after completing the washing or dryer process. I would like to use photoresistor to act as a swith that I can connect to a digital input. "Dan Hollands" wrote in message ... "Dani Reyes" wrote in message ... I would like to monitor my washer and dryer using its indicator led lights. Can this be done using breakbeam sensor ??? If so, can someone please provide me with schematic diagram how to build one. Thanks You need to more clearly describe what you want to accomplish i.e. monitor in what way. What do you mean by a breakbeam sensor? -- Dan Hollands 1120 S Creek Dr Webster NY 14580 585-872-2606 www.QuickScoreRace.com Read this to find out how photo transistors work http://www.fairchildsemi.com/an/AN/AN-3005.pdf Go here if you want to buy some http://rocky.digikey.com/scripts/Pro...S&V=46&M=BPW36 -- Dan Hollands 1120 S Creek Dr Webster NY 14580 585-872-2606 www.QuickScoreRace.com |
#5
Posted to alt.electronics
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monitoring led indicator
On Tue, 7 Feb 2006 22:49:43 -0500, "Dani Reyes"
wrote: My washer and dryer have indicator led light labelled completed which turned on after completing the washing or dryer process. I would like to use photoresistor to act as a swith that I can connect to a digital input. You might certainly do it with a photo resistor, but ambient light may prove to be a problem. You'd have to hang the photo resistors over the LEDs and make some effort to exclude ambient light (unless you're in the habit of working in the dark). Photo resistors are not photo switches - the output of a CDS photo cell drops to low hundreds of ohms when light versus megohms when dark. A silicon photo cell puts out a weak .5 volt signal in the presence of light and may put out little or nothing in the presence of red light. LED's can also be used to sense light - they output a weak voltage depending on the color of light and color of the led (red led emitter should be matched to a red LED for a detector) White LED will detect blue light best. Photo transistors would have similar drawbacks. Better and easier to wire an opto coupler in series with the indicators and bring those outputs to a connector. That would eliminate ambient light problems and avoid kludging up the front panel. If, by chance, the LEDs are modulated with a high frequency, they could be detected over some distance and may even work with high ambient light. There's probably no reason they would be modulated. With an unlimited budget you could come up with a way to detect the LED from a distance if it is that important. -- ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
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