- #1
oneamp
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I bought some 'super bright' LEDs from sparkfun:
https://www.sparkfun.com/products/8861
I got the green one, the red one, and the blue one. Guys in the comments are saying, "Wow these things light up a whole room at 75mA!" So I bought them to make a night light.
I checked out the datasheet. Max current is 75mA. Forward voltage is 3.4V. I plugged it directly into a current source (my power supply) to test it, and adjusted the voltage and current until the current was about 75mA. It was on... I guess kind of bright... but nothing like in the comments section of the site that I bought it at.
Did I do something wrong? I tried setting the voltage at 3.2, 5, 7.1, then I adjusted the current up slowly until it was about 75 mA. I must be doing something wrong.
Thanks
https://www.sparkfun.com/products/8861
I got the green one, the red one, and the blue one. Guys in the comments are saying, "Wow these things light up a whole room at 75mA!" So I bought them to make a night light.
I checked out the datasheet. Max current is 75mA. Forward voltage is 3.4V. I plugged it directly into a current source (my power supply) to test it, and adjusted the voltage and current until the current was about 75mA. It was on... I guess kind of bright... but nothing like in the comments section of the site that I bought it at.
Did I do something wrong? I tried setting the voltage at 3.2, 5, 7.1, then I adjusted the current up slowly until it was about 75 mA. I must be doing something wrong.
Thanks