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xiaobai00
Joined: 29 Jan 2007
Posts: 1
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 29 Jan 2007 9:47 what components are used to make sensor? |
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Hi i having a problem. Been thinking what are the components to make an infra red sensor. Thanks for helping in advance btw. 
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eanic
Joined: 18 Dec 2006
Posts: 55
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lladnar23
Joined: 20 Mar 2006
Posts: 211
Helped: 31
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| 31 Jan 2007 6:34 Re: what components are used to make sensor? |
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With regard to the posted project link -- The idea of using a standard IR detector module is a good one, since it detects modulated light (usually 40kHz) -- that will help to reduce interference from ambient light sources.
The circuit they used to generate the IR could be simpler if you are going to power it from batteries -- you can make a 40kHz oscillator from a LM555 very easily.
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