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You need a logic-level MOSFET that can fully turn on with 5V Vgs.
Normally the PIC output is CMOS and should pull the output both high and low. If it stays high something is wrong.Hey Carl.... I tried this several months back... The gate capacitance builds up and the output pin of the pic just stayed high... I ended up with a 57k pulldown on the gate.
I use darlingtons now...
A Google search of "sot23 logic level MOSFETs" turned up this. There are others.Hi
Yes the i/o lines are at +5v (on) 0v (off)
Can anyone suggest a logic-level MOSFET that can fully turn on with 5V Vgs pref in sot23?
True. The one he has is a 60V device and the one I suggest was 30V. If 30V isn't sufficient he obviously needs to do more searching.Don't we really need to know the Vds hamopp needs before recommending a substitute? The current is no problem, but the Vds might be.
Well the pic that i use (PIC16F628) the MODE\BPF outputs go high when selected.The pic could be sitting at 5v to 10v...
There is a 4k7 to ground.the source of the mosfets are also not at ground level...
No it doesn't! It is not a generator.The bs170\mmbf170 has a VGSS Gate-Source Voltage ± 20 V.
The bs170\mmbf170 has a VGSS Gate-Source Voltage ± 20 V. What is the output voltage of the PIC as you will need about at least 10 volts on the MOSFET gate to turn it fully on? My first guess would be no, to answer your question. Not directly anyway assuming either 3.3 or 5 volts out from your PIC.
Ron
Most 44 years old 741 opamps do not work when their power supply is only 5V. They were designed to use only a 30V supply.Here is circuit i found for agc and mute switching with bs170\mmbf170
Because I was sleeping and ....... my wife.why wait till a dozen post or more elapse before the comment?