AeroElectric-List Digest Archive

Mon 12/30/13


Total Messages Posted: 11



Today's Message Index:
----------------------
 
     1. 07:20 AM - Re: E-bus diode (user9253)
     2. 07:56 AM - Re: E-bus diode (Robert L. Nuckolls, III)
     3. 08:04 AM - Re: E-bus diode (Robert L. Nuckolls, III)
     4. 08:45 AM - Re: Re: Source for Relay DPDT (On) Off (On ? -- VPX to Lancair Flap Motor Integration (Robert L. Nuckolls, III)
     5. 08:53 AM - Re: E-bus diode (Jeff Luckey)
     6. 08:55 AM - Re: E-bus diode (Jeff Page)
     7. 09:48 AM - Re: E-bus diode (user9253)
     8. 11:26 AM - Re: Re: Source for Relay DPDT (On) Off (On ? -- VPX to Lancair Flap Motor Integration (Valin & Allyson Thorn)
     9. 01:51 PM - Re: E-bus diode (Eric M. Jones)
    10. 02:58 PM - Re: Re: Source for Relay DPDT (On) Off (On ? -- VPX to Lancair Flap Motor Integration (Robert L. Nuckolls, III)
    11. 08:41 PM - Re: E-bus diode (Thomas Blejwas)
 
 
 


Message 1


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    Time: 07:20:22 AM PST US
    Subject: Re: E-bus diode
    From: "user9253" <fransew@gmail.com>
    This posting on VansAirforce by Mike Bullock http://www.vansairforce.com/community/showpost.php?p=838578&postcount=2 led to this Schottky diode that costs $18 http://www.mouser.com/ProductDetail/IXYS/DSS2x61-0045A/?qs=%2fha2pyFadujmk%2fL9W%2fwlAGfqAiDlU%252bQn5Rt4HdD41QuAEJC6k4uxOg%3d%3d It has two diodes inside of one package. I believe the Mouser Mounting Style listed as SMD/SMT is incorrect. Digikey lists it as Chassis Mount. Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=416376#416376


    Message 2


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    Time: 07:56:48 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: E-bus diode
    At 06:33 PM 12/29/2013, you wrote: > >Would this Schottky Diode be suitable for E-bus Feed? >http://www.mouser.com/ProductDetail/IXYS/DSA300I200NA/?qs=sGAEpiMZZMtQ8nqTKtFS%2fAkrg%2fe%2fM1X2RJuduJKKNsI%3d >It appears to be very robust with easy mounting. >Joe > >-------- >Joe Gores > > Yes, but you may want to seek anohter source. Mouser seems to want to sell these in lots of 10 minimum. Bob . . .


    Message 3


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    Time: 08:04:31 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: E-bus diode
    At 08:04 PM 12/29/2013, you wrote: ><mrspudandcompany@verizon.net> > >>Would this Schottky Diode be suitable for E-bus Feed? >>http://www.mouser.com/ProductDetail/IXYS/DSA300I200NA/?qs=sGAEpiMZZMtQ8nqTKtFS%2fAkrg%2fe%2fM1X2RJuduJKKNsI%3d >>It appears to be very robust with easy mounting. > > >The spec sheet says the forward voltage drop is 0.98V. Do you think >that is acceptable? That's a worst case condition which is almost never realized in the manner in which we use them. Furhter, as explained in other narratives concerning drops in the e-bus normal feed diodes, there's no chance that a diode offers an 'unacceptable' voltage drop. The normally expected drops in all forms of diode will produce an alternator-operating e-bus voltage no less than 13v and probably HIGHER. While operating the e-bus battery-only, available voltage will be 12.5 volts or LOWER . . . and we expect things to work just fine at that level too. Don't get wrapped about the "oh-my-gosh-there's- a-voltage-drop" axle. It the grand scheme of things its immaterial. This is why we've offered and recommended the plain-vanilla, bridge rectifier with fast-on tabs for nearly 20 years . . . cheap, easy to mount and you can get the things at Radio Shack. Bob . . .


    Message 4


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    Time: 08:45:43 AM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Source for Relay DPDT (On) Off (On ? --
    VPX to Lancair Flap Motor Integration At 06:00 PM 12/29/2013, you wrote: >Thanks Bob McC, you have an excellent >memory.=C2 I=99ve corrected those labels now.=C2 > >I=99ve worked up a drawing with yours and the >other=99s suggestion to just use two relays to >interface between the VPX and Lancair flap motor >circuitry.=C2 I=99ve attached the drawing.=C2 If >anyone sees any problems or can suggest how to >make it simpler please let me know. > >I expect Marc at VPX will be concerned the VPX >will use the position senor to stop the flaps >and if a limit switch stops it first the VPX >will see it as a fault.=C2 So for it to work this >way the VPX stop settings using the position >sensor (not as accurate) will have to be in sync >with the limit switches.=C2 And the position >sensor may not be accurate enough to sync with the limit switches. > >A big thanks for everyone=99s help! > >Valin I think you're making this much more complicated than it needs to be. See: http://tinyurl.com/lel2jep You don't want to ground the flap motor power on the instrument panel ground bus . . . that goes to the firewall ground. As you've noted, pins 5 & 6 need to be identified for which one is +extend and +retract. You want to disable the VP-X limit switch functions or nullify them by programming them outside the points where the limit switches operate. Bob . . .


    Message 5


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    Time: 08:53:34 AM PST US
    From: Jeff Luckey <jluckey@pacbell.net>
    Subject: Re: E-bus diode
    I recently purchased just a few from Mouser...=0A=0A=0A=0A=0A______________ __________________=0A From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroele ctric.com>=0ATo: aeroelectric-list@matronics.com =0ASent: Monday, December 30, 2013 7:55 AM=0ASubject: Re: AeroElectric-List: E-bus diode=0A =0A=0A--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.b ob@aeroelectric.com>=0A=0AAt 06:33 PM 12/29/2013, you wrote:=0A>--> AeroEle ctric-List message posted by: "user9253" <fransew@gmail.com>=0A>=0A>Would t his Schottky Diode be suitable for E-bus Feed?=0A>http://www.mouser.com/Pro ductDetail/IXYS/DSA300I200NA/?qs=sGAEpiMZZMtQ8nqTKtFS%2fAkrg%2fe%2fM1X2RJ uduJKKNsI%3d=0A>It appears to be very robust with easy mounting.=0A>Joe=0A> =0A>--------=0A>Joe Gores=0A>=0A>=0A=0A- Yes, but you may want to seek a nohter source.=0A- Mouser seems to want to sell these in lots=0A- of =- - - - - - - - - - - - - - - -Matt Dralle ===


    Message 6


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    Time: 08:55:28 AM PST US
    From: Jeff Page <jpx@qenesis.com>
    Subject: Re: E-bus diode
    Joe, How about the IXYS DSS 2x81-0045A ? It is in the same SOT-227B package. It is a lower current device, but still capable of much larger currents than those likely seen on the E-Bus. According to the graph, it has a typical forward drop of 0.34V at 10A. Even better - you can buy 1 instead of minimum quantity 10 and they are 25% cheaper :-) Jeff Page Dream Aircraft Tundra #10 http://ca.mouser.com/ProductDetail/IXYS/DSS2x61-0045A/?qs=%2fha2pyFaduhdMr45WqeM8mDZl76obrBu5hnr8BNQ46k%3d > Would this Schottky Diode be suitable for E-bus Feed? > http://www.mouser.com/ProductDetail/IXYS/DSA300I200NA/?qs=sGAEpiMZZMtQ8nqTKtFS%2fAkrg%2fe%2fM1X2RJuduJKKNsI%3d > It appears to be very robust with easy mounting. > Joe > > -------- > Joe Gores


    Message 7


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    Time: 09:48:46 AM PST US
    Subject: Re: E-bus diode
    From: "user9253" <fransew@gmail.com>
    Jeff, did you mean DSS2x61-0045A? It has the characteristics that you mentioned. I could not find DSS 2x81-0045A. Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=416389#416389


    Message 8


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    Time: 11:26:47 AM PST US
    From: "Valin & Allyson Thorn" <thorn@starflight.aero>
    Subject: Re: Source for Relay DPDT (On) Off (On ? --
    VPX to Lancair Flap Motor Integration Thanks Bob =93 that=99s much simpler and elegant. As I looked at your design I just kept saying =9CBob=99s a genius=9D :) I think I was stuck on preserving the Lancair circuitry instead of just solving the problem. Thank you very much! Valin From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L. Nuckolls, III Sent: Monday, December 30, 2013 9:45 AM Subject: RE: AeroElectric-List: Re: Source for Relay DPDT (On) Off (On ? -- VPX to Lancair Flap Motor Integration At 06:00 PM 12/29/2013, you wrote: Thanks Bob McC, you have an excellent memory.=C3=82 I=C3=A2=82=AC=84=A2ve corrected those labels now.=C3=82 I=C3=A2=82=AC=84=A2ve worked up a drawing with yours and the other=C3=A2=82=AC=84=A2s suggestion to just use two relays to interface between the VPX and Lancair flap motor circuitry.=C3=82 I=C3=A2=82=AC=84=A2ve attached the drawing.=C3=82 If anyone sees any problems or can suggest how to make it simpler please let me know. I expect Marc at VPX will be concerned the VPX will use the position senor to stop the flaps and if a limit switch stops it first the VPX will see it as a fault.=C3=82 So for it to work this way the VPX stop settings using the position sensor (not as accurate) will have to be in sync with the limit switches.=C3=82 And the position sensor may not be accurate enough to sync with the limit switches. A big thanks for everyone=C3=A2=82=AC=84=A2s help! Valin I think you're making this much more complicated than it needs to be. See: http://tinyurl.com/lel2jep You don't want to ground the flap motor power on the instrument panel ground bus . . . that goes to the firewall ground. As you've noted, pins 5 & 6 need to be identified for which one is +extend and +retract. You want to disable the VP-X limit switch functions or nullify them by programming them outside the points where the limit switches operate. Bob . . . <http://www.aeroelectric.com> <http://www.buildersbooks.com> <http://www.homebuilthelp.com> <http://www.mypilotstore.com>


    Message 9


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    Time: 01:51:51 PM PST US
    Subject: Re: E-bus diode
    From: "Eric M. Jones" <emjones@charter.net>
    For several years I have sold: IXYS DSSX61-0045A with a heatsinks, mounting hardware, shipping and manual. It's a good choice. Eric M. Jones PerihelionDesign.com -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones(at)charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=416393#416393


    Message 10


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    Time: 02:58:44 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Source for Relay DPDT (On) Off (On ? --
    VPX to Lancair Flap Motor Integration At 01:25 PM 12/30/2013, you wrote: >Thanks Bob ' that=99s much simpler and >ellegant.=C2 As I looked at your design I just >kept saying =9CBob=99s a genius=85=9D=C2 J=C2 =C2 I >think I was stuck on preserving the Lancair >circuitry instead of just solving the problem.=C2 > >Thank you very much! > >Valin My pleasure. I'll explore the details with Marc but at the present, I'm 99.8% certain that we're golden. Bob . . .


    Message 11


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    Time: 08:41:11 PM PST US
    From: Thomas Blejwas <tomblejwas@yahoo.com>
    Subject: Re: E-bus diode
    -Of course a higher voltage drop leads to a higher heat generated and,- hence, for many of us, the attraction of the Schottky diodes.- I've been searching for single diodes to use in a modified version of -Bob's new Z- 07.- I'll have 12-15 amps-of current through one diode.-I'm wondering about a diode in the ITO-220 case, like =0Ahttp://www.digikey.com/product- detail/en/VFT4045BP-M3%2F4W/VFT4045BP-M3%2F4W-ND/3102977=0A=0AWith a forwar d of current of around 0.5V, the power to be thermally accommodated is less than 8W. and many heat sinks are available for the-TO-220 configuration. - The connections on the TO-220-must be soldered, but I'm less concerne d about soldered connections after reading Bob's recent article in Kitplane .- =0A=0AAre there other reasons for rejecting a diode like this?=0A=0ATo m=0A=0A=0A=0A=0A>________________________________=0A> From: "Robert L. Nuck olls, III" <nuckolls.bob@aeroelectric.com>=0A>To: aeroelectric-list@matroni cs.com =0A>Sent: Monday, December 30, 2013 9:01 AM=0A>Subject: Re: AeroElec tric-List: E-bus diode=0A> =0A>=0A>--> AeroElectric-List message posted by : "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>=0A>=0A>At 08:04 oger & Jean" <mrspudandcompany@verizon.net>=0A>> =0A>>> Would this Schottky Diode be suitable for E-bus Feed?=0A>>> http://www.mouser.com/ProductDetai l/IXYS/DSA300I200NA/?qs=sGAEpiMZZMtQ8nqTKtFS%2fAkrg%2fe%2fM1X2RJuduJKKNsI %3d=0A>>> It appears to be very robust with easy mounting.=0A>> =0A>> =0A>> The spec sheet says the forward voltage drop is 0.98V.- Do you think tha t is acceptable?=0A>=0A>- That's a worst case condition which is almost n ever=0A>- realized in the manner in which we use them. Furhter,=0A>- as explained in other narratives concerning drops=0A>- in the e-bus normal feed diodes, there's no chance=0A>- that a diode offers an 'unacceptable' voltage drop.=0A>=0A>- The normally expected drops in all forms of diode =0A>- will produce an alternator-operating e-bus voltage=0A>- no less t han 13v and probably HIGHER. While operating=0A>- the e-bus battery-only, available voltage will be 12.5=0A>- volts or LOWER . . . and we expect t hings to work=0A>- just fine at that level too.=0A>=0A>- Don't get wrap ped about the "oh-my-gosh-there's-=0A>- a-voltage-drop" axle.- It the g rand scheme of=0A>- things its immaterial. This is why we've offered=0A> - and recommended the plain-vanilla, bridge rectifier=0A>- with fast-on tabs for nearly 20 years . . . cheap,=0A>- easy to mount and you can get the things at=0A>- Radio Shack.=0A>=0A>=0A>=0A>=0A>- Bob . . . =0A>=0A =============0A>=0A>=0A>=0A>=0A>=0A>




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