simple question (pnp)
Archiver
Posts: 46,084
Yes, with the PNP you would connect the Emitter to 5volts, Collector to the
load, and a resistor (~4.7K - 47K) between the Base and the stamp pin, then
making the pin low would drive the load, high would turn it off.
It is usually done with NPN's in what is known as open collector or grounded
emitter configuration so that the load can be connected to a different
voltage say +12V and the Collector switches the ground side.
Original Message
From: "Richard R." Re: [noparse][[/noparse]basicstamps] simple question
> Quick question, Can I use a PNP 2N3906 in place of a 2N3904 with a 50V 1A
> 1N4001 Diode to drive a small relay? What's the difference? I am only
asking
> because I have some 2N3906's
>
> Thanks Richard
load, and a resistor (~4.7K - 47K) between the Base and the stamp pin, then
making the pin low would drive the load, high would turn it off.
It is usually done with NPN's in what is known as open collector or grounded
emitter configuration so that the load can be connected to a different
voltage say +12V and the Collector switches the ground side.
Original Message
From: "Richard R." Re: [noparse][[/noparse]basicstamps] simple question
> Quick question, Can I use a PNP 2N3906 in place of a 2N3904 with a 50V 1A
> 1N4001 Diode to drive a small relay? What's the difference? I am only
asking
> because I have some 2N3906's
>
> Thanks Richard
Comments
Richard
Original Message
From: "FalconWireless Tech Support - KF4HAZ"
<techsupport@f...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, December 14, 2001 10:04 AM
Subject: Re: [noparse][[/noparse]basicstamps] simple question (pnp)
> Yes, with the PNP you would connect the Emitter to 5volts, Collector to
the
> load, and a resistor (~4.7K - 47K) between the Base and the stamp pin,
then
> making the pin low would drive the load, high would turn it off.
>
> It is usually done with NPN's in what is known as open collector or
grounded
> emitter configuration so that the load can be connected to a different
> voltage say +12V and the Collector switches the ground side.
>
>
>
Original Message
> From: "Richard R." Re: [noparse][[/noparse]basicstamps] simple question
>
>
> > Quick question, Can I use a PNP 2N3906 in place of a 2N3904 with a 50V
1A
> > 1N4001 Diode to drive a small relay? What's the difference? I am only
> asking
> > because I have some 2N3906's
> >
> > Thanks Richard
>
>
>
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