[Diy_efi] 555 timer for injector driver, sg3526

Fri Jul 8 12:52:31 UTC 2005

In 1990's or thereabouts I did a dual injector driver with an SG3526
as a bit of a joke really for a bike, dual outputs configurable PWM
from a simple amp interface, that chip is quite versatile, it has a
totem pole output so driving a FET is easy as the turnoff
time is nice and quick, judicious use of a ferrite bead, resistor
and caps meant very stable output and a trim pot for fre as well,
easy to do all with one chip...

Mike

At 08:34 AM 7/8/05, you wrote:
>Thanks everyone!
>
>The Mosfet worked, I picked up a darlington as well, but the mosfet was PnP (IR510?) (along w/ a diode).
>
>Thanks again!
>
>
>Zoom Zoom-
>JEFF
>
>All out DIY:
>1996 Miata - T25
>2003 Protege - T3
>
>
>
>
>
><br><br><br>From: don.broadus at exeloncorp.com<br>Reply-To: diy_efi at diy-efi.org<br>To: diy_efi at diy-efi.org<br>Subject: RE: [Diy_efi] 555 timer for injector driver<br>Date: Thu, 7 Jul 2005 12:56:40 -0500 <br>MIME-Version: 1.0<br>Received: from nitro.got-boost.net ([216.114.79.59]) by mc3-f30.hotmail.com with Microsoft SMTPSVC(6.0.3790.211); Thu, 7 Jul 2005 10:58:45 -0700<br>Received: (qmail 28732 invoked from network); 7 Jul 2005 17:56:51 -0000<br>Received: from localhost (HELO nitro.got-boost.net) (?U2FsdGVkX18aGQhsNNXeZ5XxMATSEKu2yyyewurMe6I=?@127.0.0.1)  by localhost with SMTP; 7 Jul 2005 17:56:51 -0000<br>Received: (qmail 28276 invoked from network); 7 Jul 2005 17:56:48 -0000<br>Received: from icewall2.ceco.com (198.29.191.38)by 216.114.79.61.primarynetwork.com with SMTP; 7 Jul 2005 17:56:48 -0000<br>Received: from asd.ceco.com (navgw.ceco.com [130.197.136.128])by icewall2.ceco.com (8.12.11/8.12.11) with SMTP id j67Hnqhx011908for <diy_efi at diy-efi.org>; Thu, 7 Jul 2005 12:49:52 -0500 (CDT)<br>Received: from CCCMSMSWP02.energy.power.corp ([130.197.136.115])by asd.ceco.com (SAVSMTP 3.1.7.47) with SMTP id M2005070712564608701for <diy_efi at diy-efi.org>; Thu, 07 Jul 2005 12:56:46 -0500<br>Received: from CCC2KCON01.ceco.com (unverified [130.197.136.101]) byCCCMSMSWP02.energy.power.corp(Content Technologies SMTPRS 4.3.17) with ESMTP id<T71fdc7610a82c588731718 at CCCMSMSWP02.energy.power.corp> for<diy_efi at diy-efi.org>; Thu, 7 Jul 2005 12:56:46 -0500<br>Received: by CCC2KCON01-2 with Internet Mail Service (5.5.2657.72)id <NGX1WXPY>; Thu, 7 Jul 2005 12:56:46 -0500<br>X-Message-Info: JGTYoYF78jEBjZrwYp4/R6GrLsMIdIniiNdqnw8Am/Y=<br>Return-Path: <don.broadus at exeloncorp.com><br>Delivered-To: 68-diy_efi at diy-efi.org<br>X-Mailer: Internet Mail Service (5.5.2657.72)<br>X-BeenThere: diy_efi at diy-efi.org<br>X-Mailman-Version: 2.1.5<br>Precedence: list<br>List-Id: diy_efi.diy-efi.org<br>List-Unsubscribe: <http://lists.diy-efi.org/mailman/listinfo/diy_efi>,<mailto:diy_efi-request at diy-efi.org?subject=unsubscribe><br>List-Archive: <http://lists.diy-efi.org/pipermail/diy_efi><br>List-Post: <mailto:diy_efi at diy-efi.org><br>List-Help: <mailto:diy_efi-request at diy-efi.org?subject=help><br>List-Subscribe: <http://lists.diy-efi.org/mailman/listinfo/diy_efi>,<mailto:diy_efi-request at diy-efi.org?subject=subscribe><br>Errors-To: diy_efi-bounces at diy-efi.org<br>X-OriginalArrivalTime: 07 Jul 2005 17:58:45.0618 (UTC) FILETIME=[84DB4520:01C5831D]<br><br>Hi Dan: I did notice the missing clamp diode, I had planned on adding one<br>myself.<br>         
>The circuit will come in handy for pulsing injectors on the car and<br>also for<br>         a flow bench I'm working on. Thanks again for sharing a great<br>circuit.<br><br><br><br><br>-----Original Message-----<br>From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On<br>Behalf Of Daniel R. Nicoson<br>Sent: Thursday, July 07, 2005 12:01 PM<br>To: diy_efi at diy-efi.org<br>Subject: RE: [Diy_efi] 555 timer for injector driver<br><br><br>Don,<br><br>check with me tomorrow.  I want to check my breadboard to see if I an using<br>a diode across that TIP-120 on the breadboard.  I've got so many projects<br>going I just threw that out to help Jeff get going.  I probably need to do a<br>final quality check...<br><br>Dan Nicoson<br><br><br> > -----Original Message-----<br> > From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On<br> > Behalf Of don.broadus at exeloncorp.com<br> > Sent: Thursday, July 07, 2005 12:31 PM<br> > To: diy_efi at diy-efi.org<br> > Subject: RE: [Diy_efi] 555 timer for injector driver<br> ><br> ><br> > The Signal Generator  
>circuit is great !  Plan to wire one up. Thanks Dan<br> > for sending it out.<br> > Take Care  Don<br> ><br> ><br> ><br> ><br> ><br> ><br> ><br> ><br> > -----Original Message-----<br> > From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On<br> > Behalf Of Daniel R. Nicoson<br> > Sent: Thursday, July 07, 2005 10:03 AM<br> > To: diy_efi at diy-efi.org<br> > Subject: RE: [Diy_efi] 555 timer for injector driver<br> ><br> ><br> > Jeff,<br> ><br> > I'd skip the solenoid to run your injector.  You're trying to<br> > control a slow<br> > device (injector) with possibly an even slower device (solenoid).<br> ><br> > Use either a Darlington transistor or a Mosfet as has already been<br> > suggested.  They are not too expensive from the local Radio<br> > Shack.  I use a<br> > good heat sink on the TIP-120 shown in the diagram.  When running at long<br> > pulse widths, it can build some heat.  (TIP-120 was used simply because it<br> > was in my parts bin, other Darlington's will work.  You would want to add<br> > few other things to use the Mosfet properly)<br> ><br> > I've attached a .pdf of the signal generator I've developed for<br> > use with my<br> > projects.  Use as much or as little of this circuit as you wish.  I'm only<br> > using a breadboard version at this point. I may make up a PCB later this<br> > month.<br> ><br> > Take care,<br> ><br> > Dan Nicoson<br> ><br> ><br> > > -----Original Message-----<br> > > From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On<br> > > Behalf Of jeff matthews<br> > > Sent: Wednesday, July 06, 2005 9:39 PM<br> > > To: diy_efi at diy-efi.org<br> > > Subject: [Diy_efi] 555 timer for injector driver<br> > ><br> > ><br> > > Hi-<br> > > To keep my ??? simple,  I built a 555 timer to work on a little<br> > > experiment,<br> > > I have it energizing the solenoid on a  12v relay, why won't it open and<br> > > close my injector? (it's just a basic saturated 550cc).  Is there some<br> > > secret to on making an injector operate?<br> > ><br> > > Like I stated,  this is for an experiment, just thought I could handle<br> > > making an injector fire on the bench...<br> > ><br> > > Best regards,<br> > > JEFF<br> > ><br> > ><br> > > _______________________________________________<br> > > Diy_efi mailing list<br> > > Diy_efi at diy-efi.org<br> > > http://lists.diy-efi.org/mailman/listinfo/diy_efi<br> > ><br> ><br> ><br> > ************************************************************************<br> > This e-mail and any of its attachments may contain Exelon Corporation<br> > proprietary information, which is privileged, confidential, or subject<br> > to copyright belonging to the Exelon Corporation family of Companies.<br> > This e-mail is intended solely for the use of the individual or entity<br> > to which it is addressed.  If you are not the intended recipient of this<br> > e-mail, you are hereby notified that any dissemination, distribution,<br> > copying, or action taken in relation to the contents of and attachments<br> > to this e-mail is strictly prohibited and may be unlawful.  If you have<br> > received this e-mail in error, please notify the sender immediately and<br> > permanently delete the original and any copy of this e-mail and any<br> > printout. Thank You.<br> > ************************************************************************<br> ><br> > _______________________________________________<br> > Diy_efi mailing list<br> > Diy_efi at diy-efi.org<br> > http://lists.diy-efi.org/mailman/listinfo/diy_efi<br> ><br><br>_______________________________________________<br>Diy_efi mailing list<br>Diy_efi at diy-efi.org<br>http://lists.diy-efi.org/mailman/listinfo/diy_efi<br>_______________________________________________<br>Diy_efi mailing list<br>Diy_efi at diy-efi.org<br>http://lists.diy-efi.org/mailman/listinfo/diy_efi<br>
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Regards from

Mike Massen
Perth, Western Australia
VL Commodore Fuse Rail that wont warp or melt !
http://niche.iinet.net.au