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|    sci.electronics.basics    |    Elementary questions about electronics    |    72,318 messages    |
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|    Message 71,138 of 72,318    |
|    AK to amdx    |
|    Re: Resistance Light and Dark Values    |
|    15 May 19 10:51:31    |
      From: scientist77017@gmail.com              On Wednesday, May 15, 2019 at 9:59:26 AM UTC-5, amdx wrote:       > On 5/15/2019 9:46 AM, AK wrote:       > > On Wednesday, May 15, 2019 at 9:30:43 AM UTC-5, Cursitor Doom wrote:       > >> On Wed, 15 May 2019 11:15:18 +0200, Look165 wrote:       > >>       > >>> A LDR reacts in some ms when the light's wavelength is in the operating       > >>> range.       > >>       > >> You really can't beat a photodiode, though.       > >>       > >>       > >>       > >>       > >>       > >> --        > >> This message may be freely reproduced without limit or charge only via       > >> the Usenet protocol. Reproduction in whole or part through other       > >> protocols, whether for profit or not, is conditional upon a charge of       > >> GBP10.00 per reproduction. Publication in this manner via non-Usenet       > >> protocols constitutes acceptance of this condition.       > >        > > Does anyone know of an alarm circuit that they have made and works?       > >        > > I have tried 2 different circuits and both have failed.       > >        > > Andy       > >        >        > Please put the resistance meter on your LDR and give use the resistance       > Dark and then with laser light on it.       > You will need to change the scale between the two measurements.       > Mikek              In the dark, .83 on the 2M scale.              With laser, .3 on 2k scale. From a distance of 6 feet.              So, 830,000 and 300 ohms.              Andy              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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