Article View: sci.electronics
Article #4486Re: Attaching a PC speaker to an amplifier
From: Ken Thompson
Date: Thu, 05 Apr 1990 14:18
Date: Thu, 05 Apr 1990 14:18
31 lines
1229 bytes
1229 bytes
If you REALLY think you need to amplify it...
Yes you will need caps. to isolate the DC voltages of the PC from the amp.
The speaker circuits I have seen in PC's have one side of the speaker
tied to +5V and the other to and emiter follower PNP transistor.
Neither speaker termainal is at ground. Use two caps:
|\
| \
| |
| |----------------||------------> to amp
| | |
| |---+------------||------------>
| | | |
| / | |
|/ | |
spkr feed isolation
to caps
spkr
--
Ken Thompson N0ITL
NCR Corp. 3718 N. Rock Road
Wichita,Ks. 67226 (316)636-8783
Ken.Thompson@wichita.ncr.com
Technical Details
Message-ID:
<545@entec.Wichita.NCR.COM>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!ncr-sd!ncrlnk!ncrwic!encad!entec!kthompsoReferences:
<1733@sparko.gwu.edu>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!ncr-sd!ncrlnk!ncrwic!encad!entec!kthompso From: kthompso@entec.Wichita.NCR.COM (Ken Thompson) Newsgroups: sci.electronics Subject: Re: Attaching a PC speaker to an amplifier Message-ID: <545@entec.Wichita.NCR.COM> Date: 5 Apr 90 14:18:54 GMT References: <1733@sparko.gwu.edu> Reply-To: kthompso@entec.Wichita.NCR.COM (Ken Thompson) Organization: NCR Corporation, Wichita, KS Lines: 31