20 apr 2012 kl. 18.54 skrev emc-users-requ...@lists.sourceforge.net: >
As Dave said below, U can't shortcircuit base to ground in your circuit, the resistor is intended to limit the base current in your schematics so what U can do is to set the M point to ground, that should make your relay "klick". The mentioned fact that U measure approx - 4 V relative +5 on the base pin does in fact prove that the Base-Collector junction is burnt. So first U have to replace your semiconductor! / Roger > > > ------------------------------ > > Message: 5 > Date: Fri, 20 Apr 2012 17:21:06 +0100 > From: Dave Caroline <dave.thearchiv...@gmail.com> > Subject: Re: [Emc-users] Relay driver not working > To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > Message-ID: > <CALfYgtkMK31Yq53-LcvyV3DXjkZ8wm8wyT=NL1i=ztbnxv-...@mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > There is no way a base can go beyond around .6 volts if the transistor > is ok or it is connected correctly > > shorting the base to ground will kill the transistor unless the psu is rubbish > > Dave Caroline ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
