Transistor and an LED in parallel

  • Thread starter physsure
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  • #1
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Hi! I'm new to EE and was wondering if this: https://imgur.com/a/lSgNl52 would cause the LED to light up, or would the transistor short the circuit?

(I forgot to add the arrow on the diode and i'm too lazy to fix it. And I just realized that the resistor is wrongly placed.)
 

Answers and Replies

  • #2
berkeman
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Hi! I'm new to EE and was wondering if this: https://imgur.com/a/lSgNl52 would cause the LED to light up, or would the transistor short the circuit?

(I forgot to add the arrow on the diode and i'm too lazy to fix it. And I just realized that the resistor is wrongly placed.)
Nope, doesn't work that way. When the transistor turns on as a "low-side switch", you want current to be drawn from the + power supply, through a current-limiting resistor, through the LED and the transistor to ground.

See if you can use Google Images to find typical circuits that do this. Let us know if you have trouble with the search terms and we can suggest some... :smile:
 

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