Recent content by Pro289

A "surf board" does sound nice. But way too much labor involved for what I'm looking for, as I deal with hundreds of LM317s. Has anyone done tests on the LM1086 or something similar?

I believe the 2.1v would be the forward voltage, the voltage the LED will run at when it's limited at 20mA, like if you used a constant current power circuit. Check this site http://led.linear1.org/1led.wiz for a nice LED calculator.

Hi. I use an LM317 in constant current mode to vary the current from ~20ma to ~400ma, the voltage use is about 3 to 5. I just don't like that there's a 3 volt drop out for the 317 design. I'm wondering if anyone knows of any pin compatible replacements with a lower drop out? I wouldn't mind...

So the light wouldn't "ramp" up, and the cap makes no difference?

Those links are fairly informative, but they still didn't answer my question. Let's say I have a circuit with a battery->switch->cap->light. If I turn the switch on, would the light illuminate immediately with full voltage or would you see a slow "ramping" effect as the cap charges? If so, would...

Hi, I have a newbie question regarding caps in series and parallel. When you apply voltage to a cap in a circuit, is there a difference in the voltage on the other side of the cap between the methods of use above? Like a cap in series, does it need to be charged fully for the voltage to be...