dude that links says 808nm which is in the infared range as in you cant see the dot plus the infareds are hell to collaminate not even worth it theres not many better deals than sekats
You really should READ the description a lot better.....that price is EACH, not a lot of 5......the pictures do not match up with what is for sale a lot of the time !
As far as the seller himself goes - he is a super nice guy, and sells quality stuff - but they ARE Infra-red diodes, not "red" as the ones I sell, so you cannto really compare his product to mine ""Mac Vs PC"" springs to mind.....
I understand you are trying your best to do this as inexpensively as possible, and I even applaud you for that ! I had to do a TON of researching, "networking" and TONS of emails, even being ripped off multiple thousands of dollars before I was able to get a hold of a decent contact !! So, best of luck in that regard.
power in - power out = power dissipated as heat
(2.2V x 1.4A = 3.08W) – (allegedly 1W out) = around 2 Watts dissipated as heat.
Now let’s run it for 50 seconds, 2W x 50 Seconds = 100 Watt-Seconds = 100 Joules = ~24 calories.
Assuming a specific heat of about .25cal/gram/degree C (just a guess really), and a mass of 5 grams, then without any other energy being removed from the system the average temp of the system would go up by 20 C .