Electronics > Beginners
NPN & PNP LTspice
Spitfire1.2:
Hello!
I a bit confused with a circuit on LTspice and I need your help if possible.
I tried simulating the following circuit, from my calculation the power on the Led should be around 20mA, but the simulated circuit shows 1.07mA. I tried the same circuit on other simple online simulators like part-sim and falstad and I got the 20mA. Is there something critical that I am missing? Or is it a design error in LTspice?
Thanks for your time!
EEEnthusiast:
Can you reverse the C & E of Q2 and try again?
rstofer:
What's R5 suppose to represent?
StillTrying:
And what does R3 do, it just looks like a jumble of components to me. :)
Spitfire1.2:
R5 is the Led resistor, sorry but I accidentaly moved it. R3 is simulating a load on the NPN. The PNP was reversed :palm:, i took it for granted that the collector was on the botton. Thanks for the help!
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