I was wondering, can a fault ever occur with EMC where the frequency of the charge pump frequency increases?? This would keep the charge pump detector 'up', but a uP would detect an error condition.
Regards Roland On 8 December 2010 20:53, John Kasunich <jmkasun...@fastmail.fm> wrote: > On 4 December 2010 00:46, Kirk Wallace <kwall...@wallacecompany.com> > wrote: > > > > I'm working on using an ATtiny to watch EMC2's charge pump. > > Why not use a charge pump circuit to watch the charge pump signal? > > That is what it was designed for, and is probably the most fail-safe > solution. The timeout period is set by the capacitors and resistors > you choose, and can't get accidentally changed or disabled. > > A charge pump circuit consists of two diodes, one small capacitor > (a few hundred pF or a few nF), one medium capacitor (a few tens > of nF), and a resistor. Also needed is something to look at its > output and turn off the dangerous stuff if the output drops too low. > That can be as simple as a transistor driving a relay coil, or you > could use a schmidt trigger input logic gate followed by whatever > you need to drive. > > No microcontroller, no programming, no configuration, no bits. > Analog lives! > > John Kasunich > > -- > John Kasunich > jmkasun...@fastmail.fm > > > > ------------------------------------------------------------------------------ > This SF Dev2Dev email is sponsored by: > > WikiLeaks The End of the Free Internet > http://p.sf.net/sfu/therealnews-com > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ This SF Dev2Dev email is sponsored by: WikiLeaks The End of the Free Internet http://p.sf.net/sfu/therealnews-com _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
