PNP LED switch circuit

181

02:11:28

this is a PNP LED switch circuit

published 5 years ago

wyoelk

5 years ago

Generally speaking leds in parallel is not recommended due to inconsistent voltage drop. Perhaps Google leds in parallel for more info. Doesn't say you can't, but not recommended

Robert_Kidd

5 years ago

These LED’s are fine in parallel as they each have a series resistor. Problems occur when LED’s are directly in parallel, especially if they are different colours since their operating voltage varies.

Robert_Kidd

5 years ago

Note, however, that you have used an NPN transistor so it would be useful if you could alter the title and description to show this. Thanks.

fatcat2

5 years ago

Yes. LEDs are not supposed to be connected in a direct parallel combination but the current hogging state doesn't occur when a series resistir is added to each LED.

dariog665

5 years ago

You mean NPN.. not pnp! Det one you are using is NPN

fatcat2

5 years ago

Oh, I didn't pay attention to that.

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