CS>Peter Redaudo Inquiry on LED Assembly

Mon, 4 Dec 2006 07:50:41 -0800

Dear Peter,
Please excuse this tardy reply, and the manner of addressing it (this Forwarded message).
I have, simply, been overwhelmed by off-list inquiries reference my original post on this subject.
I believe this post, to another member, will address all of your questioning except the one on the geographic placement of the LED assembly in relation to the prostate. The best results were obtained by placing the assembly immediately behind the junction of the scrotum and the body proper, in direct contact with the skin surface.
Sincerely, Brooks Bradley.

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--- Begin Message --- Dear Tony,
The wave length was 630 nm. The bulbs were Clear Red (red light emitted from a clear bulb). Some people claim that 660 nm is best----we could not determine any significant difference, for our applications... The exact bulbs we used (in our last assemblies) were catalogue # 604-L7113SECH ....From Mouser Electronics catalogue. These cost about 82 cents U.S., each.. The manufacturer's number is
L7113SECH....Kingbright Company. I recommend you obtain some solderless connectors (# 593-cnx310000 Mouser stock number...cost about 50 cents U.S.each), which enable you to just plug the LED leads directly into the nice plastic-case base. Also the outside diameter of these bases yields a perfect fit when slipped into the openings provided by the shell holders for 30 caliber M-1 carbine cartridges. However, almost any type of cartridge holder can be made into an acceptable receptacle for the assembly (just be sure to obtain a shell size roughly compatible with the O.D. of the LED holders. The nominal voltage rating for this bulb is 2.4 vdc. However, we just hooked two conventional 1.5 vdc AA batteries in series to yield 3.0 vdc-----works fine. Actually, we hooked 4 batteries together in a series/parallel connection ....for extended life. Just hook two sets of two series connected AA batteries together in parallel and connect the output leads from this pwr supply to! the appropriate leads from each of the "ganged" LED leads. Be sure to check each LED for proper identification for the (-) and the (+) lead----and mark each. Next, connect ALL OF THE POSITIVE LEADS together and terminate with a single wire for connecting to the battery assembly. This provides one set of "ganged" leads mentioned earlier. Do the same thing for the (-) leads of the LED group. This provies the second set of "ganged" leads from the LED assembly. Connect your ON/Off switch into either side (+) or (-) power leads from the battery power system and connect the remaining side of this switch-leg to the remaining wire from the LED assembly. NOTE: Do remember, LEDs, being diodes, will NOT conduct if connected improperly (they are, actually, half-wave rectifiers, themselves).
The only tedious work involved, is the careful grouping of each line of LED wires into their respective polarity groups....e.g. ALL negative leads from the LED assembly and All positive leads from the assembly must be connected properly---into two separate groups----each group terminated into a single conductor for connection to the battery pwr system. NOTE: Any LED which does not light up on test, is...probably, reverse polarity connected (check with an ohm-meter to be sure this is not the case), if you have one which doesn't light..
If you do not want to go to the trouble to insert an ON/OFF switch into the system, just
twist the split lead (switch leg) from the battery (the one you have chosen to complete the power circuit)back together....to initiate operation . Then, just untwist to shut down.
My apologies for the detailed commentary, but I have to assume all people who contact me on such matters are quite intelligent...but sometimes, technically uniformed. Therefore, do not be insulted if you are a graduate E.E.
I hope these comments prove of value to you.
My Best Regards, Brooks.
p.s. Actually, these LED bulbs are 7000 MCD AND WILL EASILY PENETRATE 5/8 " OF BONE AND TISSUE.

---------[ Received Mail Content ]----------
>Subject : led light array
>Date : Sat, 02 Dec 2006 07:45:07 +0200
>From : "Tony Moody"
>To : "Brooks Bradley"
>
>On 29 Nov 2006 at 10:17, Brooks Bradley wrote about :
>Subject : Re: CS> CS & DMSO:COMMENT
>
>> high-intensity LED light array (using 3500 MCD BULBS...in a 10 to 15 bulb assembly)
>
>Dear Brooks,
>Could you please enlighten me about the colour of the leds used in the array mentioned
>above. Were these emitting a red light or a white light?
>
>Thank you for your very valuable comments and information.
>
>Yours faithfully,
>Tony Moody
>
>


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