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 Post subject: No offence ... BUT
 Post Posted: Fri Nov 01, 2002 9:00 am 
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Joined: Sun Feb 12, 2012 1:19 am
Posts: 10742
Originaly posted by Warn-A-Brotha,
I HATE THE NEW FORUM!
im too scared to post,
its too ... open! i dunno .. i dont like it
its hard to follow, i get lost and its soo frustrating!?

i keep forgetting if blue or green means i visited it!?
:(

please some-how keep the old forum style :/
and set "NEW TOPICS" BOLD! so you can see what ppl are replying to

( sorry ... )


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 Post subject: Test, don't look
 Post Posted: Sun Jul 06, 2003 1:00 am 
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Originaly posted by GalFisk,
The charge from the piezo-electric device is several thousand volts. Are you going to use the spark (in an ignitor) aswell as using it to close a 12V circuit?
I would think you could use either a small transformer, maybe the ignition transformer from a camera flash, to transform down the voltage, or you could use a small resistor in series with the piezo/spark gap. Either way you'd want to use the resulting pulse to trigger a transistor.
A relay will not have fast enough reaction time, since the pulse from a piezoelectric device is very short, and you'd need to use a transistor to drive the relay anyway.
you need to know the polarity of the spark, since we're dealing with electronics. If you connect a neon indicator lamp to the device, the electrode connected to the negative terminal will light up orange when you press the trigger.
Coming to think of it, a couple of diodes would be the bet way to get the necessary voltage to trigger the transistor. Then you'd need to wire up something like this:


+-------> <---+--|>--|>---+-------------------------------------+----> to battery -
| Spark gap | diodes ^ |
| | |/ emitter |
-[ ] Trigger +---------| NPN transistor |
| | base | collector |
| _ ------------> to load and battery + |
| ^ diode |
+--------------+-------------------------------------------------+



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 Post subject: Nope. Another test
 Post Posted: Sun Jul 06, 2003 1:00 am 
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Joined: Sun Feb 12, 2012 1:19 am
Posts: 10742
Originaly posted by GalFisk,
The charge from the piezo-electric device is several thousand volts. Are you going to use the spark (in an ignitor) aswell as using it to close a 12V circuit?
I would think you could use either a small transformer, maybe the ignition transformer from a camera flash, to transform down the voltage, or you could use a small resistor in series with the piezo/spark gap. Either way you'd want to use the resulting pulse to trigger a transistor.
A relay will not have fast enough reaction time, since the pulse from a piezoelectric device is very short, and you'd need to use a transistor to drive the relay anyway.
you need to know the polarity of the spark, since we're dealing with electronics. If you connect a neon indicator lamp to the device, the electrode connected to the negative terminal will light up orange when you press the trigger.
Coming to think of it, a couple of diodes would be the bet way to get the necessary voltage to trigger the transistor. Then you'd need to wire up something like this:


+-------> <---+--|>--|>---+-------------------------------------+----> to battery -
| Spark gap | diodes ^ |
| | |/ emitter |
-[ ] Trigger +---------| NPN transistor |
| | base | collector |
| _ ------------> to load and battery + |
| ^ diode |
+--------------+-------------------------------------------------+



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 Post subject: Nope. Again:
 Post Posted: Sun Jul 06, 2003 1:00 am 
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Joined: Sun Feb 12, 2012 1:19 am
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Originaly posted by GalFisk,
The charge from the piezo-electric device is several thousand volts. Are you going to use the spark (in an ignitor) aswell as using it to close a 12V circuit?
I would think you could use either a small transformer, maybe the ignition transformer from a camera flash, to transform down the voltage, or you could use a small resistor in series with the piezo/spark gap. Either way you'd want to use the resulting pulse to trigger a transistor.
A relay will not have fast enough reaction time, since the pulse from a piezoelectric device is very short, and you'd need to use a transistor to drive the relay anyway.
you need to know the polarity of the spark, since we're dealing with electronics. If you connect a neon indicator lamp to the device, the electrode connected to the negative terminal will light up orange when you press the trigger.
Coming to think of it, a couple of diodes would be the bet way to get the necessary voltage to trigger the transistor. Then you'd need to wire up something like this:
<br /><br /> +-------> <---+--|>--|>---+-------------------------------------+----> to battery -<br /> | Spark gap | diodes ^ |<br /> | | |/ emitter |<br />-[ ] Trigger +---------| NPN transistor |<br /> | | base | collector |<br /> | _ ------------> to load and battery + |<br /> | ^ diode |<br /> +--------------+-------------------------------------------------+<br /></plaintexte><br /><br /></div> <br clear="all" /><br /> <table width="100%" cellspacing="0"> <tr valign="middle"> <td class="gensmall" align="right"> </td> </tr> </table> </td> </tr> </table> </td> </tr> <tr> <td class="row-post-bottom" align="center"><a href="#top"><img src="./styles/black_pearl/imageset/arrow_up.png" alt="Top" title="Top" /></a>&nbsp;<a href="#bottom"><img src="./styles/black_pearl/imageset/arrow_down.png" alt="" title="" /></a></td> <td class="row-post-bottom"><div class="gensmall" style="float:left;">&nbsp;<a href="./memberlist.php?mode=viewprofile&amp;u=2&amp;sid=6a2b2743cb6815dc4c7c512c70c13218"><img src="./styles/black_pearl/imageset/en/icon_user_profile.png" alt="Profile" title="Profile" /></a> &nbsp;</div> <div class="gensmall" style="float: right;">&nbsp;</div></td> </tr> <tr><td class="spacer" colspan="2"><img src="./styles/black_pearl/theme/images/spacer.gif" width="1" height="4" alt="" /></td></tr> <tr> <td class="row-post-top" align="center" valign="middle"> <a name="p91"></a> <b class="postauthor" style="color:#AA0000">Spudtech</b> </td> <td class="row-post-top" width="100%"> <table width="100%" cellspacing="0"> <tr> <td class="gensmall" width="100%"><div style="float:left;">&nbsp;<b>Post subject:</b> <a href="#p91">Disaster. another try:</a></div><div style="float:right;">&nbsp;<a href="./viewtopic.php?p=91&amp;sid=6a2b2743cb6815dc4c7c512c70c13218#p91"><img src="./styles/black_pearl/imageset/icon_post_target.gif" width="7" height="9" alt="Post" title="Post" /></a>&nbsp;<b>Posted:</b> Sun Jul 06, 2003 1:00 am&nbsp;</div></td> </tr> </table> </td> </tr> <tr> <td class="row-post-body" valign="top"> <table cellspacing="4" align="center" width="150"> <tr><td><img src="./styles/black_pearl/imageset/en/icon_user_offline.png" alt="Offline" title="Offline" /></td></tr> <tr><td class="postdetails">Site Admin</td></tr> </table> <span class="postdetails"> <br /><b>Joined:</b> Sun Feb 12, 2012 1:19 am<br /><b>Posts:</b> 10742 </span> </td> <td class="row-post-body" valign="top"> <table width="100%" cellspacing="5"> <tr> <td> <div class="postbody"><strong>Originaly posted by GalFisk</strong>,</br>The charge from the piezo-electric device is several thousand volts. Are you going to use the spark (in an ignitor) aswell as using it to close a 12V circuit?<br />I would think you could use either a small transformer, maybe the ignition transformer from a camera flash, to transform down the voltage, or you could use a small resistor in series with the piezo/spark gap. Either way you'd want to use the resulting pulse to trigger a transistor.<br />A relay will not have fast enough reaction time, since the pulse from a piezoelectric device is very short, and you'd need to use a transistor to drive the relay anyway.<br />you need to know the polarity of the spark, since we're dealing with electronics. If you connect a neon indicator lamp to the device, the electrode connected to the negative terminal will light up orange when you press the trigger.<br />Coming to think of it, a couple of diodes would be the bet way to get the necessary voltage to trigger the transistor. Then you'd need to wire up something like this:<br /><code><br /><br /> +-------> <---+--|>--|>---+-------------------------------------+----> to battery -<br /> | Spark gap | diodes ^ |<br /> | | |/ emitter |<br />-[ ] Trigger +---------| NPN transistor |<br /> | | base | collector |<br /> | _ ------------> to load and battery + |<br /> | ^ diode |<br /> +--------------+-------------------------------------------------+<br /></code><br /><br /></div> <br clear="all" /><br /> <table width="100%" cellspacing="0"> <tr valign="middle"> <td class="gensmall" align="right"> </td> </tr> </table> </td> </tr> </table> </td> </tr> <tr> <td class="row-post-bottom" align="center"><a href="#top"><img src="./styles/black_pearl/imageset/arrow_up.png" alt="Top" title="Top" /></a>&nbsp;<a href="#bottom"><img src="./styles/black_pearl/imageset/arrow_down.png" alt="" title="" /></a></td> <td class="row-post-bottom"><div class="gensmall" style="float:left;">&nbsp;<a href="./memberlist.php?mode=viewprofile&amp;u=2&amp;sid=6a2b2743cb6815dc4c7c512c70c13218"><img src="./styles/black_pearl/imageset/en/icon_user_profile.png" alt="Profile" title="Profile" /></a> &nbsp;</div> <div class="gensmall" style="float: right;">&nbsp;</div></td> </tr> <tr><td class="spacer" colspan="2"><img src="./styles/black_pearl/theme/images/spacer.gif" width="1" height="4" alt="" /></td></tr> <tr> <td class="row-post-top" align="center" valign="middle"> <a name="p92"></a> <b class="postauthor" style="color:#AA0000">Spudtech</b> </td> <td class="row-post-top" width="100%"> <table width="100%" cellspacing="0"> <tr> <td class="gensmall" width="100%"><div style="float:left;">&nbsp;<b>Post subject:</b> <a href="#p92">I think I've got it now:</a></div><div style="float:right;">&nbsp;<a href="./viewtopic.php?p=92&amp;sid=6a2b2743cb6815dc4c7c512c70c13218#p92"><img src="./styles/black_pearl/imageset/icon_post_target.gif" width="7" height="9" alt="Post" title="Post" /></a>&nbsp;<b>Posted:</b> Sun Jul 06, 2003 1:00 am&nbsp;</div></td> </tr> </table> </td> </tr> <tr> <td class="row-post-body" valign="top"> <table cellspacing="4" align="center" width="150"> <tr><td><img src="./styles/black_pearl/imageset/en/icon_user_offline.png" alt="Offline" title="Offline" /></td></tr> <tr><td class="postdetails">Site Admin</td></tr> </table> <span class="postdetails"> <br /><b>Joined:</b> Sun Feb 12, 2012 1:19 am<br /><b>Posts:</b> 10742 </span> </td> <td class="row-post-body" valign="top"> <table width="100%" cellspacing="5"> <tr> <td> <div class="postbody"><strong>Originaly posted by GalFisk</strong>,</br>The charge from the piezo-electric device is several thousand volts. Are you going to use the spark (in an ignitor) aswell as using it to close a 12V circuit?<br />I would think you could use either a small transformer, maybe the ignition transformer from a camera flash, to transform down the voltage, or you could use a small resistor in series with the piezo/spark gap. Either way you'd want to use the resulting pulse to trigger a transistor.<br />A relay will not have fast enough reaction time, since the pulse from a piezoelectric device is very short, and you'd need to use a transistor to drive the relay anyway.<br />you need to know the polarity of the spark, since we're dealing with electronics. If you connect a neon indicator lamp to the device, the electrode connected to the negative terminal will light up orange when you press the trigger.<br />Coming to think of it, a couple of diodes would be the bet way to get the necessary voltage to trigger the transistor. Then you'd need to wire up something like this:<br /><plaintext> +-------> <---+--|>--|>---+-------------------------------------+----> to battery -</plaintext><br /><plaintext> | Spark gap | diodes ^ |</plaintext><br /><plaintext> | | |/ emitter |</plaintext><br /><plaintext>-[ ] Trigger +---------| NPN transistor |</plaintext><br /><plaintext> | | base | collector |</plaintext><br /><plaintext> | _ ------------> to load and battery + |</plaintext><br /><plaintext> | ^ diode |<plaintext><br /></plaintext> +--------------+-------------------------------------------------+</plaintext></div> <br clear="all" /><br /> <table width="100%" cellspacing="0"> <tr valign="middle"> <td class="gensmall" align="right"> </td> </tr> </table> </td> </tr> </table> </td> </tr> <tr> <td class="row-post-bottom" align="center"><a href="#top"><img src="./styles/black_pearl/imageset/arrow_up.png" alt="Top" title="Top" /></a>&nbsp;<a href="#bottom"><img src="./styles/black_pearl/imageset/arrow_down.png" alt="" title="" /></a></td> <td class="row-post-bottom"><div class="gensmall" style="float:left;">&nbsp;<a href="./memberlist.php?mode=viewprofile&amp;u=2&amp;sid=6a2b2743cb6815dc4c7c512c70c13218"><img src="./styles/black_pearl/imageset/en/icon_user_profile.png" alt="Profile" title="Profile" /></a> &nbsp;</div> <div class="gensmall" style="float: right;">&nbsp;</div></td> </tr> <tr><td class="spacer" colspan="2"><img src="./styles/black_pearl/theme/images/spacer.gif" width="1" height="4" alt="" /></td></tr> <tr> <td class="row-post-top" align="center" valign="middle"> <a name="p93"></a> <b class="postauthor" style="color:#AA0000">Spudtech</b> </td> <td class="row-post-top" width="100%"> <table width="100%" cellspacing="0"> <tr> <td class="gensmall" width="100%"><div style="float:left;">&nbsp;<b>Post subject:</b> <a href="#p93">Right...</a></div><div style="float:right;">&nbsp;<a href="./viewtopic.php?p=93&amp;sid=6a2b2743cb6815dc4c7c512c70c13218#p93"><img src="./styles/black_pearl/imageset/icon_post_target.gif" width="7" height="9" alt="Post" title="Post" /></a>&nbsp;<b>Posted:</b> Sun Jul 06, 2003 1:00 am&nbsp;</div></td> </tr> </table> </td> </tr> <tr> <td class="row-post-body" valign="top"> <table cellspacing="4" align="center" width="150"> <tr><td><img src="./styles/black_pearl/imageset/en/icon_user_offline.png" alt="Offline" title="Offline" /></td></tr> <tr><td class="postdetails">Site Admin</td></tr> </table> <span class="postdetails"> <br /><b>Joined:</b> Sun Feb 12, 2012 1:19 am<br /><b>Posts:</b> 10742 </span> </td> <td class="row-post-body" valign="top"> <table width="100%" cellspacing="5"> <tr> <td> <div class="postbody"><strong>Originaly posted by GalFisk</strong>,</br>The charge from the piezo-electric device is several thousand volts. Are you going to use the spark (in an ignitor) aswell as using it to close a 12V circuit?<br />I would think you could use either a small transformer, maybe the ignition transformer from a camera flash, to transform down the voltage, or you could use a small resistor in series with the piezo/spark gap. Either way you'd want to use the resulting pulse to trigger a transistor.<br />A relay will not have fast enough reaction time, since the pulse from a piezoelectric device is very short, and you'd need to use a transistor to drive the relay anyway.<br />you need to know the polarity of the spark, since we're dealing with electronics. If you connect a neon indicator lamp to the device, the electrode connected to the negative terminal will light up orange when you press the trigger.<br />Coming to think of it, a couple of diodes would be the bet way to get the necessary voltage to trigger the transistor. Then you'd need to wire up something like this:<br /><pre><br /> +-------> <---+--|>--|>---+-------------------------------------+----> to battery -<br /> | Spark gap | diodes ^ |<br /> | | |/ emitter |<br />-[ ] Trigger +---------| NPN transistor |<br /> | | base | collector |<br /> | _ ------------> to load and battery + |<br /> | ^ diode |<br /> +--------------+-------------------------------------------------+<br /></pre></div> <br clear="all" /><br /> <table width="100%" cellspacing="0"> <tr valign="middle"> <td class="gensmall" align="right"> </td> </tr> </table> </td> </tr> </table> </td> </tr> <tr> <td class="row-post-bottom" align="center"><a href="#top"><img src="./styles/black_pearl/imageset/arrow_up.png" alt="Top" title="Top" /></a>&nbsp;<a href="#bottom"><img src="./styles/black_pearl/imageset/arrow_down.png" alt="" title="" /></a></td> <td class="row-post-bottom"><div class="gensmall" style="float:left;">&nbsp;<a href="./memberlist.php?mode=viewprofile&amp;u=2&amp;sid=6a2b2743cb6815dc4c7c512c70c13218"><img src="./styles/black_pearl/imageset/en/icon_user_profile.png" alt="Profile" title="Profile" /></a> &nbsp;</div> <div class="gensmall" style="float: right;">&nbsp;</div></td> </tr> <tr><td class="spacer" colspan="2"><img src="./styles/black_pearl/theme/images/spacer.gif" width="1" height="4" alt="" /></td></tr> <tr><td class="cat-bottom" colspan="2"><form name="viewtopic" method="post" action="./viewtopic.php?f=45&amp;t=28&amp;sid=6a2b2743cb6815dc4c7c512c70c13218"><span class="gensmall">Display posts from previous:</span> <select name="st" id="st"><option value="0" selected="selected">All posts</option><option value="1">1 day</option><option value="7">7 days</option><option value="14">2 weeks</option><option value="30">1 month</option><option value="90">3 months</option><option value="180">6 months</option><option value="365">1 year</option></select>&nbsp;<span class="gensmall">Sort by</span> <select name="sk" id="sk"><option value="a">Author</option><option value="t" selected="selected">Post time</option><option value="s">Subject</option></select> <select name="sd" id="sd"><option value="a" selected="selected">Ascending</option><option value="d">Descending</option></select>&nbsp;<input class="btnlite" type="submit" value="Go" name="sort" /></form></td></tr> </table> <div class="tbl-f-l"><div class="tbl-f-r"><div class="tbl-f-c">&nbsp;</div></div></div></div> <table width="100%" cellspacing="1"> <tr> <td align="left" valign="middle" nowrap="nowrap"> <a href="./posting.php?mode=post&amp;f=45&amp;sid=6a2b2743cb6815dc4c7c512c70c13218"><img src="./styles/black_pearl/imageset/en/button_topic_locked.png" alt="Forum locked" title="Forum locked" /></a>&nbsp;<a href="./posting.php?mode=reply&amp;f=45&amp;t=28&amp;sid=6a2b2743cb6815dc4c7c512c70c13218"><img src="./styles/black_pearl/imageset/en/button_topic_locked.png" alt="This topic is locked, you cannot edit posts or make further replies." title="This topic is locked, you cannot edit posts or make further replies." /></a> </td> <td class="nav" valign="middle" nowrap="nowrap">&nbsp;Page <strong>1</strong> of <strong>1</strong><br /></td> <td class="gensmall" nowrap="nowrap">&nbsp;[ 7 posts ]&nbsp;</td> <td class="gensmall" width="100%" align="right" nowrap="nowrap"></td> </tr> </table> </div> <div id="pagefooter"></div> <br clear="all" /> <div class="bc-tbl bc-div"> <p class="bc-header"> <a href="./index.php?sid=6a2b2743cb6815dc4c7c512c70c13218">Board index</a>&nbsp;&#187;&nbsp;<a href="./viewforum.php?f=36&amp;sid=6a2b2743cb6815dc4c7c512c70c13218">Archive</a>&nbsp;&#187;&nbsp;<a href="./viewforum.php?f=37&amp;sid=6a2b2743cb6815dc4c7c512c70c13218">Old Spudtech Message Board</a>&nbsp;&#187;&nbsp;<a href="./viewforum.php?f=45&amp;sid=6a2b2743cb6815dc4c7c512c70c13218">Other Lame Rantings</a> </p> <div class="bc-links"> <div class="bc-links-left">It is currently Sun Jul 22, 2018 3:55 pm<br />All times are UTC - 6 hours </div> <a href="./search.php?search_id=unanswered&amp;sid=6a2b2743cb6815dc4c7c512c70c13218">View unanswered posts</a>&nbsp;|&nbsp;<a href="./search.php?search_id=active_topics&amp;sid=6a2b2743cb6815dc4c7c512c70c13218">View active topics</a><br /> &nbsp; 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