Search found 149 matches
- Thu Jun 16, 2005 12:48 pm
- Forum: General Discussion
- Topic: electric fence
- Replies: 12
- Views: 5295
Re: electric fence
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by Matt Nuzum: [QB]My first electronics kit was a simple blinking LED that ran off a simple LM3909 (discontinued) chip. I hooked it up to a D cell battery and it was still blinking...
- Mon Jun 13, 2005 3:12 pm
- Forum: General Discussion
- Topic: Test Patterns in Computer Form
- Replies: 3
- Views: 2185
Re: Test Patterns in Computer Form
Take a look at the free Monitor Test download here.
- Fri Jun 03, 2005 4:03 pm
- Forum: General Discussion
- Topic: microfich-microfilm of back issues of electronics magazi
- Replies: 7
- Views: 3736
Re: microfich-microfilm of back issues of electronics magazi
They're in Ann Harbor.
- Thu Jun 02, 2005 2:56 pm
- Forum: General Discussion
- Topic: microfich-microfilm of back issues of electronics magazi
- Replies: 7
- Views: 3736
Re: microfich-microfilm of back issues of electronics magazi
There used to be a place in Benton Harbor, Michigan, which advertised in (I think) QST magazine, amongst others. Can't think of their name.
- Wed May 25, 2005 5:31 am
- Forum: General Discussion
- Topic: Treadmill into potters wheel
- Replies: 7
- Views: 3803
Re: Treadmill into potters wheel
It's a 24V 2W zener.
- Sun May 22, 2005 7:54 am
- Forum: General Discussion
- Topic: Hex Heverter Relay activation
- Replies: 14
- Views: 6494
Re: Hex Heverter Relay activation
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by philba: it needs to be high for some period before going low. I've run into this before .... Try it. <hr></blockquote> Ok philba, will do.<p>[ May 22, 2005: Message edited by: D...
- Fri May 20, 2005 10:47 pm
- Forum: General Discussion
- Topic: Sound Power
- Replies: 25
- Views: 10710
Re: Sound Power
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by ezpcb.com: I have a question, will 120dB untrasonic sound damage human's ears?? <hr></blockquote><p>120dBA for more than a few minutes almost certainly would.<p>[ May 20, 2005: ...
- Fri May 20, 2005 11:55 am
- Forum: General Discussion
- Topic: Hex Heverter Relay activation
- Replies: 14
- Views: 6494
Re: Hex Heverter Relay activation
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>Originally posted by philba: The trigger voltage needs to be high for at least as long as the output pulse.<hr></blockquote> No it doesn't. It needs only a brief negative-going pulse. <blockquote><f...
- Thu May 19, 2005 9:20 am
- Forum: General Discussion
- Topic: Hex Heverter Relay activation
- Replies: 14
- Views: 6494
Re: Hex Heverter Relay activation
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>A single 555 in one shot mode triggered by a short pulse won't work for this because the trigger pulse needs to be as long or longer than the output pulse.<hr></blockquote> No it doesn't, and it can...
- Mon May 16, 2005 7:39 pm
- Forum: General Discussion
- Topic: Add DC bias to sinusoidal signal
- Replies: 13
- Views: 8007
Re: Add DC bias to sinusoidal signal
What op-amp are you using?
- Mon May 09, 2005 11:36 am
- Forum: General Discussion
- Topic: need transformer source
- Replies: 5
- Views: 3308
Re: need transformer source
<blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr>If you need isolated windings, you are up the well known creek with out a paddle.<hr></blockquote><p>You can connect in series the secondaries of separate transformers to get whatever voltage you ne...
- Thu May 05, 2005 2:46 pm
- Forum: General Discussion
- Topic: Gmail
- Replies: 4
- Views: 2852
Gmail
I have, in other forums, come across several requests for Gmail invitations.<p>Can anyone explain what the fascination with Gmail is?
- Thu Apr 28, 2005 1:38 pm
- Forum: General Discussion
- Topic: Capacitor Mfg. Logo Help
- Replies: 7
- Views: 3219
Re: Capacitor Mfg. Logo Help
It's Siemens.
Do a Google Image search for "siemens logo".
Do a Google Image search for "siemens logo".
- Thu Apr 21, 2005 7:34 pm
- Forum: General Discussion
- Topic: Backup power for PLC
- Replies: 5
- Views: 3362
Re: Backup power for PLC
This scheme would work.
- Thu Apr 21, 2005 10:17 am
- Forum: General Discussion
- Topic: TTL & TIP41 FOR DC MOTOR SPEED CONTROL
- Replies: 30
- Views: 12167