Semiconductor PNs and sources
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Posts: 46,084
I've been looking for parts referred to me in a previous thread. I can
find the semicondutors listed under '2NXXXX' type numbers, but I can't
locate any listed under the 'BCXXX' type numbers. I've tried DigiKey,
Jameco, and Radio Shack. Does anyone know who makes these 'BCXXX' PNs
and/or know of an online source?
Thanks
Don
Original Message
From: "Rob" <robbed666@b...>
To: <basicstamps@yahoogroups.com>
Sent: Tuesday, June 04, 2002 8:51 AM
Subject: RE: [noparse][[/noparse]basicstamps] Grounding Issue
> BC337, BC107, 2N3904, BC107,8,9 all NPN devices with HFE >50. Put a 4.7K
> OHM resistor in series with base connection (will limit I drawn from
> chip to approx 1mA), and don't forget a back EMF diode across the relay
> coil (1N4000 or any of the 1N4*** series will do).
>
> ROB
>
find the semicondutors listed under '2NXXXX' type numbers, but I can't
locate any listed under the 'BCXXX' type numbers. I've tried DigiKey,
Jameco, and Radio Shack. Does anyone know who makes these 'BCXXX' PNs
and/or know of an online source?
Thanks
Don
Original Message
From: "Rob" <robbed666@b...>
To: <basicstamps@yahoogroups.com>
Sent: Tuesday, June 04, 2002 8:51 AM
Subject: RE: [noparse][[/noparse]basicstamps] Grounding Issue
> BC337, BC107, 2N3904, BC107,8,9 all NPN devices with HFE >50. Put a 4.7K
> OHM resistor in series with base connection (will limit I drawn from
> chip to approx 1mA), and don't forget a back EMF diode across the relay
> coil (1N4000 or any of the 1N4*** series will do).
>
> ROB
>
Comments
Sorry the BCxxx series of transistors is causing you a problem. They are
just a generic general purpose device, used widely in the UK and Europe.
It appears that they're not so widely used in the U.S.
The devices you want will generally conform to the following.
HFE >50, VCE >20 volts DC, IC >100mA ft > 100KHZ.
Any general purpose switching transistor will do. MPSA43 seems
good (Radio Shack). Radio Shack Cat. #: 276-1617 15 NPN devices for
$2.49 good as well. Hope this helps.
Rob
Original Message
From: Don [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=FxOYcI0-MHlkG9VL67mKMeK1_-GGWY6iYsOY5YI0zh5BUjB9D9euZMOlM9uqcY73U_Yek7hVdatz3JLuzoVEmXIKdyBhf3w]renegade.engineer@v...[/url
Sent: 06 June 2002 17:13
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Semiconductor PNs and sources
I've been looking for parts referred to me in a previous thread. I
can
find the semicondutors listed under '2NXXXX' type numbers, but I can't
locate any listed under the 'BCXXX' type numbers. I've tried DigiKey,
Jameco, and Radio Shack. Does anyone know who makes these 'BCXXX' PNs
and/or know of an online source?
Thanks
Don
Original Message
From: "Rob" <robbed666@b...>
To: <basicstamps@yahoogroups.com>
Sent: Tuesday, June 04, 2002 8:51 AM
Subject: RE: [noparse][[/noparse]basicstamps] Grounding Issue
> BC337, BC107, 2N3904, BC107,8,9 all NPN devices with HFE >50. Put a
4.7K
> OHM resistor in series with base connection (will limit I drawn from
> chip to approx 1mA), and don't forget a back EMF diode across the
relay
> coil (1N4000 or any of the 1N4*** series will do).
>
> ROB
>
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Don
Original Message
From: "Rob" <robbed666@b...>
To: <basicstamps@yahoogroups.com>
Sent: Thursday, June 06, 2002 11:24 AM
Subject: RE: [noparse][[/noparse]basicstamps] Semiconductor PNs and sources
> Hi Don,
>
> Sorry the BCxxx series of transistors is causing you a problem. They are
> just a generic general purpose device, used widely in the UK and Europe.
> It appears that they're not so widely used in the U.S.
> The devices you want will generally conform to the following.
> HFE >50, VCE >20 volts DC, IC >100mA ft > 100KHZ.
> Any general purpose switching transistor will do. MPSA43 seems
> good (Radio Shack). Radio Shack Cat. #: 276-1617 15 NPN devices for
> $2.49 good as well. Hope this helps.
>
> Rob
>
>
Original Message
> From: Don [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=A2VbhFsOEVHC_DPnew1aHl5uHSH8LN0u4vE5deIx2qSLLG_c7CdWzGHA68y9bmU2xGdGwR9OV4_x6f_FcafTkmW5HnRlqgrB]renegade.engineer@v...[/url
> Sent: 06 June 2002 17:13
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Semiconductor PNs and sources
>
> I've been looking for parts referred to me in a previous thread. I
> can
> find the semicondutors listed under '2NXXXX' type numbers, but I can't
> locate any listed under the 'BCXXX' type numbers. I've tried DigiKey,
> Jameco, and Radio Shack. Does anyone know who makes these 'BCXXX' PNs
> and/or know of an online source?
> Thanks
> Don
>
Original Message
> From: "Rob" <robbed666@b...>
> To: <basicstamps@yahoogroups.com>
> Sent: Tuesday, June 04, 2002 8:51 AM
> Subject: RE: [noparse][[/noparse]basicstamps] Grounding Issue
>
>
> > BC337, BC107, 2N3904, BC107,8,9 all NPN devices with HFE >50. Put a
> 4.7K
> > OHM resistor in series with base connection (will limit I drawn from
> > chip to approx 1mA), and don't forget a back EMF diode across the
> relay
> > coil (1N4000 or any of the 1N4*** series will do).
> >
> > ROB
> >
>
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject
> and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
>
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject and
Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>
>