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September 29, 2025, 06:01:57 PM

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Too much base ?

Started by saturated, September 27, 2025, 02:01:08 AM

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saturated

I wanted to set up a circuit and see what happens.

Previously I was trying to do something different and after gathering a few components my calculations showed a voltage drop across the collector resistor of 23.9 when Vcc was 24 volts  :grr

So today I wanted to put together a circuit with a lower base resistor and see 🙈 if it would melt or blow up the transistor I had no idea what it would do.

Here is the schematic

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So I put it together and dialed up the voltage and kept watching for smoke but really nothing bad happened (I don't think)  :loco

Also I measured emitter current

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And here are my results

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One thing I am noticing is the lower beta value seems iirc in all the book experiments i did beta was about 170  xP

Seems like the base emitter voltage drop looks good so maybe I was nowhere near Chernobyl territory idk and that wasn't what I was trying to do.  I tried to feel if the transistor was getting warm/hot but it's tiny and I couldn't really tell.

My main interest was with the suspected huge voltage drop across the collector how much was gonna be left for the emitter resistor  :grr


I ask stupid questions
and make stupid mistakes

criticism, critique, derision, flaming, verbal abuse welcome