Recent content by ebunnyboy

thnx to your reply by using digital camera and also introducing it to a photodiode has cover the spectral range also datasheet from here http://www.thorlabs.com/thorProduct...umber=LED1450E its from throlaps when i tried 63 the voltage drop increases to 0.9 v so I will go to buy...

Iam using 5 v power supply , I have three of them when testing using 190 ohms or 200 or 220 ohms the voltage drop across led is about 0.8 V , I tried to replace the led with anthor new one same happens that's led me to test it using low resistance

hi , every body here , I really seek a help , I have an Ir led from thorlaps it's wave length 1450 nm , I followed the specs Forward voltage at 20mA is = 1.2 v typical , 1.5 v Max Max DC forward current = 100mA Power dissipation is 120 mW I tried the following resistance 200 ,220 ,190,180...