My scope shows that the copper is working ok. May try amber or yellow to see if the performance is better. See page 13: http://www.cree.com/~/media/Files/Cree/LED%20Components%20and%20Modules/HB/Data%20Sheets/C513A%20WSN%20WSS%20MSN%20MSS%201042.pdf
> Date: Tue, 9 Sep 2014 16:42:30 -0400 > From: [email protected] > To: [email protected] > Subject: Re: [volt-nuts] Finally got around to modifying my Fluke 845ab with > LED's > > Hi Dallas, > > The thing is, CdS cells peak sharply at about 560nm, which is green/yellow. > They are blind to most of white light... especially to the blues which are > prominent in white LED's. > > White LED's are designed purely for bulk illumination. They have a very > slow response so that they won't flicker when used for domestic lighting > off of a 50/60Hz power source. > > There are also green yellow and red LED's that are designed the same way, > but there are many that switch quickly too. > > -Chuck Harris > > Dallas Smith wrote: > > > > > > > > Hi Chuck, > > > > > > Its only 84Hz, It had the offset > > problem long before I made this mod. The new meter at work many decades ago > > also had this problem. > > > > > > I pick white so the full spectrum would > > be covered by the Csd's. Checked waveforms with scope, has sharp rising and > > falling edges. This mod may not be as elegant as a Linear Devices copper > > mod, > > but at lest I will not have to mess with the shielded front end. > > > > > > The > > offset may be due to the bias current in the front end reacting with the > > different > > polarities. > > > > > > Dallas > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
