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4hv.org :: Forums :: General Science and Electronics
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What is this component?

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Arcstarter
Thu Jan 08 2009, 01:44AM Print
Arcstarter Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
I got these strange components from a box of random junk from the electronic goldmine. They are tan, they have three pins, and they have 1.4.5h on the front. The logo on it is something like a circle around a B.

Thanks in advance.
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rp181
Thu Jan 08 2009, 01:48AM
rp181 Registered Member #1062 Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
A picture would be very useful. Its probably some kind of transistor.
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Arcstarter
Thu Jan 08 2009, 02:32AM
Arcstarter Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
How the heck did i forget to put the pic? I already took it and everything..

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Myke
Thu Jan 08 2009, 02:34AM
Myke Registered Member #540 Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
It looks like a ceramic resonator or two caps for power supply filtering (I don't know if they come in that configuration but I guess it's possible).
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teslacoolguy
Thu Jan 08 2009, 03:14AM
teslacoolguy Registered Member #1107 Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
it's almost definately a ceramic resonator.
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Weston
Thu Jan 08 2009, 04:01AM
Weston Registered Member #1316 Joined: Thu Feb 14 2008, 03:35AM
Location: Cambridge, MA
Posts: 365
A ceramic resonator with an internal capacitor. They can be used in place of crystals.
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aonomus
Thu Jan 08 2009, 06:04AM
aonomus Registered Member #1497 Joined: Thu May 22 2008, 05:24AM
Location: Toronto, Ontario, Canada
Posts: 801
Definitely a ceramic resonator, they can be used in place of crystals: where frequency stability isn't super important (ie: not in clocks, frequency counters, signal generators, etc.)
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teslacoolguy
Thu Jan 08 2009, 04:46PM
teslacoolguy Registered Member #1107 Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
I use them in place of a crystal with PIC microcontrollers.
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Tom540
Thu Jan 08 2009, 05:21PM
Tom540 Banned on 3/17/2009.
Registered Member #487 Joined: Sun Jul 09 2006, 01:22AM
Location:
Posts: 617
Yeah they aren't as fragile as crystals are.
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101111
Thu Jan 08 2009, 10:59PM
101111 Registered Member #575 Joined: Sun Mar 11 2007, 04:00AM
Location: Norway
Posts: 263
aonomus wrote ...

Definitely a ceramic resonator, they can be used in place of crystals: where frequency stability isn't super important (ie: not in clocks, frequency counters, signal generators, etc.)

I don't think they are much more unstable than normal metal crystals.
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