MOSFET Usage
in [Design]
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From: Kevin McMurtrie on 5 Jun 2010 00:53 In article <mc0i06liv3gpuanifu2vr1rr8a4aefe05j(a)4ax.com>, "JosephKK"<quiettechblue(a)yahoo.com> wrote: > On Wed, 02 Jun 2010 23:08:37 -0700, Kevin McMurtrie > <mcmurtrie(a)pixelmemory.us> wrote: > > >In article <8hvNn.20$EM2.15(a)newsfe10.ams2>, > > "ian field" <gangprobing.alien(a)ntlworld.com> wrote: > > > >> "neddie" <seegoon99(a)yahoo.com> wrote in message > >> news:e6534cd8-07af-4844-b35c-85bccdfbdc07(a)m33g2000vbi.googlegroups.com... > >> On Jun 2, 12:37 am, "Ron M." <strmbr...(a)hotmail.com> wrote: > >> > On May 28, 9:50 am, "ian field" <gangprobing.al...(a)ntlworld.com> > >> > wrote: > >> > > <snip> > > >> > No it's not that. I am having to wrap myself around all this and still > >> > keep my base design. This is just the output circuit. I have other > >> > circuitry considerations that I must take into account. I have already > >> > designed and tested the sequencing circuits and they function great. I > >> > don't want to have to go back and re-design the whole thing to > >> > accommodate just the outputs. That is why I am so hard up to not > >> > change my control side. I am using 555 as pulse timing and buffer for > >> > the outputs. This part of the circuitry must remain. I know I am being > >> > rather rigid but this section cannot change as the pulse shaping is > >> > critical for it to function correctly. I will eventually get it to > >> > work correctly with enough current carrying capacity to do what it > >> > needs to. I was just entertaining different thoughts on accomplishing > >> > it. Now that I have all of these different suggestions I wll get some > >> > parts and start bread boarding to see what works and what don't. Sorry > >> > for taking you guys on this roller coaster. I will come back and let > >> > all of you know what worked and what didn't. That is if you're at all > >> > interested. THANKS once again to all who have responded. L8R > >> > >> A simple method of getting the extra voltage needed for the drive for > >> the N channel > >> fet is a BATTERY!!! Just add it in "on top"of the supply for the fets. > >> It will have to be changed when it goes flat , but the current draw is > >> not big and it will probably > >> last a long time.All you need then is a couple of resistors and 2 > >> transistors. > >> > >> Do try to keep up - I suggested that days ago. > > > >I've seen spec sheets for chips that have a chain of LEDs on one side > >and a chain of photo diodes on the other side. I always wondered which > >they more frequently used for - precision scientific instruments or > >hacks. > > How about a link or something? http://pewa.panasonic.com/pcsd/product/pmos/pdf/mosfet.pdf http://www.vishay.com/docs/84639/vo1263aa.pdf http://www.dionics-usa.com/PDFs/PV%20Mosfet%20Driver%20Catalog.pdf -- I won't see Google Groups replies because I must filter them as spam
From: JosephKK on 6 Jun 2010 01:10
On Fri, 04 Jun 2010 21:53:18 -0700, Kevin McMurtrie <mcmurtrie(a)pixelmemory.us> wrote: >In article <mc0i06liv3gpuanifu2vr1rr8a4aefe05j(a)4ax.com>, > "JosephKK"<quiettechblue(a)yahoo.com> wrote: > >> On Wed, 02 Jun 2010 23:08:37 -0700, Kevin McMurtrie >> <mcmurtrie(a)pixelmemory.us> wrote: >> >> >In article <8hvNn.20$EM2.15(a)newsfe10.ams2>, >> > "ian field" <gangprobing.alien(a)ntlworld.com> wrote: >> > >> >> "neddie" <seegoon99(a)yahoo.com> wrote in message >> >> news:e6534cd8-07af-4844-b35c-85bccdfbdc07(a)m33g2000vbi.googlegroups.com... >> >> On Jun 2, 12:37 am, "Ron M." <strmbr...(a)hotmail.com> wrote: >> >> > On May 28, 9:50 am, "ian field" <gangprobing.al...(a)ntlworld.com> >> >> > wrote: >> >> > >> <snip> >> >> >> > No it's not that. I am having to wrap myself around all this and still >> >> > keep my base design. This is just the output circuit. I have other >> >> > circuitry considerations that I must take into account. I have already >> >> > designed and tested the sequencing circuits and they function great. I >> >> > don't want to have to go back and re-design the whole thing to >> >> > accommodate just the outputs. That is why I am so hard up to not >> >> > change my control side. I am using 555 as pulse timing and buffer for >> >> > the outputs. This part of the circuitry must remain. I know I am being >> >> > rather rigid but this section cannot change as the pulse shaping is >> >> > critical for it to function correctly. I will eventually get it to >> >> > work correctly with enough current carrying capacity to do what it >> >> > needs to. I was just entertaining different thoughts on accomplishing >> >> > it. Now that I have all of these different suggestions I wll get some >> >> > parts and start bread boarding to see what works and what don't. Sorry >> >> > for taking you guys on this roller coaster. I will come back and let >> >> > all of you know what worked and what didn't. That is if you're at all >> >> > interested. THANKS once again to all who have responded. L8R >> >> >> >> A simple method of getting the extra voltage needed for the drive for >> >> the N channel >> >> fet is a BATTERY!!! Just add it in "on top"of the supply for the fets. >> >> It will have to be changed when it goes flat , but the current draw is >> >> not big and it will probably >> >> last a long time.All you need then is a couple of resistors and 2 >> >> transistors. >> >> >> >> Do try to keep up - I suggested that days ago. >> > >> >I've seen spec sheets for chips that have a chain of LEDs on one side >> >and a chain of photo diodes on the other side. I always wondered which >> >they more frequently used for - precision scientific instruments or >> >hacks. >> >> How about a link or something? > >http://pewa.panasonic.com/pcsd/product/pmos/pdf/mosfet.pdf >http://www.vishay.com/docs/84639/vo1263aa.pdf >http://www.dionics-usa.com/PDFs/PV%20Mosfet%20Driver%20Catalog.pdf Going primarily by the data sheets (Vishay in particular) i see them as being used in bigger variable frequency motor drives. |