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Are you ever confusing!!sazerac99us said:In this case, I was meaning a PNP BJT.
TRy the circuit in my earlyer post!!sazerac99us said:No, I did'nt understand, which is precisely why i am writing to this forum. Figure 1 was my idea for this....someone else suggested something, so I made figure 2, to clarify what he said, because it was'nt clear in my mind.
If you have a suggestion, im all ears, if not, and you only wish to state the obvious, that I don't understand all this, its not necessary. I'm trying to get a BJT as well as a MOSFET solution to this. I apologize for any confusion.
Your circuit is exactly the same, except it is missing a resistor to turn off Q2 when it is hot, and to turn off Q2 quickly.Tarsil said:TRy the circuit in my earlyer post!!
Yup...my mistake . Th for pointing that out.audioguru said:Your circuit is exactly the same, except it is missing a resistor to turn off Q2 when it is hot, and to turn off Q2 quickly.
I would go with NPN/PNP because i allready have them . But i guess the mosfet wil disipate a bit less heat and the circuit is simpler.Your choice.sazerac99us said:Tarsil,
Yes I saw your circuit and was wondering how the base of Q2 would ever be high and noticed it was essentially the same as the one we ended up with.
Thanks (both of you) for your posts!!!
Which is preferable, using an NPN driving the PNP or just driving a p-channel MOSFET directly?