Thanks for all that information on do it yourself laser. Do you see a 940 nm laser LED that you could do the same thing with? 940 goes deeper into joints for joints tendons arthritis etc. . Biobeam sells a 940 and a 660<http://www.biobeam.cz/gbr/index.php?option=com_content&task=view&id=39&Itemid=118>
Thanks Garrick On Thu, May 20, 2010 at 1:35 PM, Norton, Steve <stephen.nor...@ngc.com>wrote: > I know I did not provide ant DIY info on my previous post but time was > short. So here is a little help if you want to make your own low cost > unit. > > You can easily make a good unit within your 30.00 budget. For easy of > assembly I would recommend using > http://www.futurlec.com/LED/LEDCLR15.shtml at a cost of $2.90 plus $4.00 > shipping. The power supply I show later can power up to 7 of the modules > so you can get more of them if you want to be able to radiate a larger > area at once. Or if radiating fingers, you could radiate both sides of > your finger(s) simultaneously. If you look online, many commercial units > use 630 nm LEDs. That wavelength gives up a very little in penetration > depth vs 660 nm while reportedly being more effective for healing than > 660 nm or the higher frequency wavelengths. I know that laser diodes get > more press (and cost more) than LED based units but I don't think that > the lasers provide better performance. The unit above has 15 LEDs that > operate at 15 ma at 2 volts. That means that each LED uses 30 milliwatts > (mW) of power. Conversion efficiencies of a red Led is normally in the > 45 - 50% range for current technology low power LEDs. The red laser > diodes in laser pointers are usually around 10 mW output. So you would > only need a conversion efficiency of 33.3% for 1 LED to get out the same > amount of light as a laser pointer. That means that with 33.3% > conversion efficiency the module above gives as much light output as 15 > laser pointers. Not too shabby. Much older red LEDs had a conversion > efficiency of only around 20%. If the LEDs in the module are those old > LEDs, it will still provide as much light as 9 laser pointers. Sill not > too shabby. And at a much lower cost. > > Now on to the power supply. 15 volts is not a convenient voltage for > batteries although you could use two 9V batteries to get 18V and then > use a series resistor to limit the current to 30 ma. But I would > recommend buying a 15V plug in power supply. One is available at > American Science & Surplus for $3.50. Adapter # 22752. See: > > http://www.sciplus.com/singleItem.cfm/terms/3850 > > > However AS&S has a minimum purchase of 10.00 so you will need to buy > some additional items to get to the $10.00 minimum. Maybe you could use > some additional laser pointers: > > http://www.sciplus.com/search.cfm?utm_source=internal&utm_medium=search&; > utm_content=cf&utm_campaign=celsearchtest&formfield1234567891=169&formfi > eld1234567892=5&formfield1234567894=&term=laser&btnHand.x=17&btnHand.y=7<http://www.sciplus.com/search.cfm?utm_source=internal&utm_medium=search&%0Autm_content=cf&utm_campaign=celsearchtest&formfield1234567891=169&formfi%0Aeld1234567892=5&formfield1234567894=&term=laser&btnHand.x=17&btnHand.y=7> > > And there is a flat shipping cost of $5.95 for orders up to $15.00 so > the lowest cost could be $16.00 to you. > > So your total cost would be around $7.00 plus $16.00 = $23.00. > > Putting the unit together will be easy. Remove the connectors from the > LED module and the power supply, expose several inches of the two wires > in each cable and strip away some of the insulation at the end of each > wire. Now connect (twist together) one wire from the power supply to one > wire from the LED module. Any wires are ok. Now connect the two > remaining wires. Insulate each connection with tape. Plug in the power > supply. If the module lights up you are done. If it does not. Just > reverse the wire connections, plug it in and the module should light up. > Note: you can do this method with the LED module ONLY because putting a > reverse voltage of 15 volts on the module will not harm it. DO NOT use > this technique with other electronic equipment. > > - Steve N > > > -----Original Message----- > From: Norton, Steve > Sent: Wednesday, May 19, 2010 2:57 PM > To: silver-list@eskimo.com > Subject: FW: CS>Lasers and thinning hair - low cost options > > > Lisa, > > The following link provides some excellent technical information: > > http://heelspurs.com/led.html > > Since you are looking for a very low cost option here are some choices. > > You can buy one of these for $2.90 plus shipping and connect it to 15 > volts DC. The wavelength of the LED is 632 nm, which is good. > > http://www.futurlec.com/LED/LEDCLR15.shtml > > > If you can determine pin numbers and solder wires you can wire 3 of the > following displays in series and connect them to 6 volts. This will be > complicated for someone who has not done something like this before. > They cost $1.40 each plus shipping. The wavelength of the LED is 660 nm, > which is about ideal > > http://www.futurlec.com/LED/LEDM57R.shtml > > > A little higher in cost at $8.90, plus shipping is the following. It is > simple to connect since there are only two wires and it uses 12 VDC. The > wavelength of the LED is 630 nm, which is still good. > > http://www.futurlec.com/LED/LEDMR16RD.shtml > > > All these low cost options use LEDs rather than laser diodes. I expected > laser diodes to be more efficient and give out more light for the > current input but from what I have found there is little difference in > efficiency. I would not hesitate to use these devices. I wouldn't bother > with blue LEDs for your application. It won't have much affect except to > look pretty. > > Here are the pages that provide the prices for the options above. > > http://www.futurlec.com/LEDMatrix.shtml > > http://www.futurlec.com/LED_Lamps.shtml > > I hope this helps some. > > - Steve N > - > >
