ProChrono light sensor?
Posted 29 March 2012 - 07:32 AM
Posted 29 March 2012 - 03:56 PM
Try Mouser or Digikey and have a look at their spec sheets on 5mm discrete white LEDs.
Don't forget, you'll have to power them. Unsmoothed DC will be good enough and they can be joined in series, preferably with a series resistor. You could, in fact, have them running at switchable illumination levels. Without experimenting, you can't determine just what level of current will give you the ideal illumination of the sensor(s) but with modern LEDs, chances are that a current of 10mA would be adequate. You will need to run the chains of series LEDs in parallel. I can help you further, should you wish, by contacting me directly.
Posted 29 March 2012 - 09:16 PM
Posted 29 March 2012 - 11:21 PM
I went to do the smoke test on some stuff I'd finished building this evening, switched on, no bang, no sizzle, no smoke, NOTHING! Hells bells, what the heck have I done wrong? Panic - be calm, deep breath, oooommmm, deep breath ooommm, deep breath, ooooommmm, beggar it, I've switched on the wrong PSU!
Posted 30 March 2012 - 08:58 PM
Good choice on Prochrono, i nearly bought one but as you said by the time you have the extras you could have the best the CED M2. I have the infra red, weird shooting in pitch black but gives exactly the same readings even when fluorescent of all things is over head.
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