XTRProf
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Post by XTRProf on May 8, 2012 5:19:38 GMT
Yeah, here: I trying to put in LEDs as my father is as good as deaf so that anybody pressing the bell he at least can see the LED blinking. This wireless bell is with the usual evergreen tune clips with a local flavour. So can I attach the LEDs with a series resistor to the speaker teminal to let them blink with the music? What value of resistor to start with and power rating? The door bell uses 2 AA batteries. Any other better thoughts and proposals will definitely be welcomed!
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Post by Deleted on May 8, 2012 8:59:21 GMT
This is a thought not a proposal Many years ago I rang the doorbell of a little back-to-back terrace house. I hadn't really noticed but the three windows of the house all showed light. Pushing the doorbell plunged the whole house into darkness! Seemed a bit extreme but it was about 45 years ago so not that much in the way of electronic gizmos around. It was effective! Syd
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XTRProf
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Pssst ! Got any spare capacitors ?
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Post by XTRProf on May 8, 2012 9:52:58 GMT
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Post by Deleted on May 8, 2012 10:08:48 GMT
It was probably wired byXTRProf, and simply blew the main fuse ! ;D
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Post by Deleted on May 8, 2012 11:15:56 GMT
;D ;D ;D
I should have added it was momentary!
Syd
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Post by Deleted on May 8, 2012 11:28:57 GMT
A bit grand Chong Pulled from Google Earth - same area. Syd
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Post by Deleted on May 8, 2012 11:56:13 GMT
I have a Monty Python-esque image of a huge hand digging said blind person in the ribs each time the door bell rings and the ringer having a big cheesey grin! I found this; talkingelectronics.com/projects/WirelessDoorbell/WirelessDoorbell.htmlJudging from that I really can't see why not. Assuming you have battery power of anything from 3v to 9v you may need to regulate down and probably bypass the music generator before said resistor.
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Post by Deleted on May 8, 2012 22:16:52 GMT
I have a Monty Python-esque image of a huge hand digging said blind person in the ribs each time the door bell rings and the ringer having a big cheesey grin! I found this; talkingelectronics.com/projects/WirelessDoorbell/WirelessDoorbell.htmlJudging from that I really can't see why not. Assuming you have battery power of anything from 3v to 9v you may need to regulate down and probably bypass the music generator before said resistor. I would like to see a flash going off whenever someone pushed the button after dark. Should deter a few from hanging around when thinking they have been photographed?
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XTRProf
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Post by XTRProf on May 9, 2012 1:14:55 GMT
Thanks very much. That should be more or less the schema for a wireless door bell. Let me think about it as I have not looked fully into that url. Obviously the LEDs must be on the receiver end instead of the transmitter. Hmm, maybe I put it more grand. Disco light to coax him up to dance to the waltz ............ Yeeha, middle of last century music with a new beat. Dr Beats?
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XTRProf
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Post by XTRProf on May 9, 2012 2:41:08 GMT
After looking at the receiver schema, the best point for the LED is still the speaker terminals with an added series resistor. As it takes only about 1ma at 3V = 3mW max, a 1/4 to 1/2 W resistor will do. But at what resistance value since the speaker terminal is at amplified V? If only I have a peak voltmeter to measure the peak voltage on ding dong. When correct, the LED should blink with the tune. Yeeha, will have a PRAT door bell LED.
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XTRProf
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Pssst ! Got any spare capacitors ?
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Post by XTRProf on May 9, 2012 15:37:58 GMT
Would you install such door bells? Eyeball Door Bell ..........
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