Reverse Polarity Protection
Archiver
Posts: 46,084
On Mon, 22 Apr 2002 16:27:26 -0000, sznavor23 wrote:
>hi there,
>
>
>you do this in the program to run the other banks...
>on the top of the first program put this (replacing the example
>names with your file names)
>
>'{$STAMP BS2SX,program1.bsx,program2.bsx,program3.bsx}
>
>leave the ' character there dont take it out
>
>
>then on the end of the first memory bank of code you just put run 1
>
>then it will run the next program
>
>
>remember you start on program 0 and not program 1
>
>on all the banks of program you copy and paste the above (replacing
>my example names with YOUR file names), so it knows to associate ALL
>·the code to the stamp project
>
>'{$STAMP BS2SX,program1.bsx,program2.bsx,program3.bsx}
>
>on each bank end you just run the next bank, after you fill up bank
>0 you use run 1, after you fill up bank 1 you use run 2.......etc.
>
>
>steve
>
>
>hope that wasnt TOO confusing....sorry.
>
>
Hello,
I'm controlling some serial motor controllers with a BS2p and, by accident, I've
connected the motor power to the amplifier reversed which blows up the amplifier
(litterally!). I'm looking for a good way to protect the controller from
reverse polarity. My first thought was to use a bridge rectifier or just a fat
rectifier diode in line, but there is an undesirable voltage drop.
Any suggestions?
Thanks,
Stewart
--
Stewart Mayer, stewlist@k... on 04/22/2002
>hi there,
>
>
>you do this in the program to run the other banks...
>on the top of the first program put this (replacing the example
>names with your file names)
>
>'{$STAMP BS2SX,program1.bsx,program2.bsx,program3.bsx}
>
>leave the ' character there dont take it out
>
>
>then on the end of the first memory bank of code you just put run 1
>
>then it will run the next program
>
>
>remember you start on program 0 and not program 1
>
>on all the banks of program you copy and paste the above (replacing
>my example names with YOUR file names), so it knows to associate ALL
>·the code to the stamp project
>
>'{$STAMP BS2SX,program1.bsx,program2.bsx,program3.bsx}
>
>on each bank end you just run the next bank, after you fill up bank
>0 you use run 1, after you fill up bank 1 you use run 2.......etc.
>
>
>steve
>
>
>hope that wasnt TOO confusing....sorry.
>
>
Hello,
I'm controlling some serial motor controllers with a BS2p and, by accident, I've
connected the motor power to the amplifier reversed which blows up the amplifier
(litterally!). I'm looking for a good way to protect the controller from
reverse polarity. My first thought was to use a bridge rectifier or just a fat
rectifier diode in line, but there is an undesirable voltage drop.
Any suggestions?
Thanks,
Stewart
--
Stewart Mayer, stewlist@k... on 04/22/2002
Comments
Bet that smelled!!!! Every diode has a voltage drop usually .6 to 1 volt.
Might try something more mechanical, a keyed connector that does not allow
it to be reversed.
Good Luck and keep smoking!!!
Eric
Original Message
From: "Stewart Mayer" <stewlist@k...>
To: <basicstamps@yahoogroups.com>
Sent: Monday, April 22, 2002 6:47 PM
Subject: [noparse][[/noparse]basicstamps] Reverse Polarity Protection
On Mon, 22 Apr 2002 16:27:26 -0000, sznavor23 wrote:
>hi there,
>
>
>you do this in the program to run the other banks...
>on the top of the first program put this (replacing the example
>names with your file names)
>
>'{$STAMP BS2SX,program1.bsx,program2.bsx,program3.bsx}
>
>leave the ' character there dont take it out
>
>
>then on the end of the first memory bank of code you just put run 1
>
>then it will run the next program
>
>
>remember you start on program 0 and not program 1
>
>on all the banks of program you copy and paste the above (replacing
>my example names with YOUR file names), so it knows to associate ALL
> the code to the stamp project
>
>'{$STAMP BS2SX,program1.bsx,program2.bsx,program3.bsx}
>
>on each bank end you just run the next bank, after you fill up bank
>0 you use run 1, after you fill up bank 1 you use run 2.......etc.
>
>
>steve
>
>
>hope that wasnt TOO confusing....sorry.
>
>
Hello,
I'm controlling some serial motor controllers with a BS2p and, by accident,
I've connected the motor power to the amplifier reversed which blows up the
amplifier (litterally!). I'm looking for a good way to protect the
controller from reverse polarity. My first thought was to use a bridge
rectifier or just a fat rectifier diode in line, but there is an undesirable
voltage drop.
Any suggestions?
Thanks,
Stewart
--
Stewart Mayer, stewlist@k... on 04/22/2002
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powered and without any drop if in the right direction.
ACJacques
Stewart Mayer gravada:
> On Mon, 22 Apr 2002 16:27:26 -0000, sznavor23 wrote:
> >hi there,
> >
> >
> >you do this in the program to run the other banks...
> >on the top of the first program put this (replacing the example
> >names with your file names)
> >
> >'{$STAMP BS2SX,program1.bsx,program2.bsx,program3.bsx}
> >
> >leave the ' character there dont take it out
> >
> >
> >then on the end of the first memory bank of code you just put run 1
> >
> >then it will run the next program
> >
> >
> >remember you start on program 0 and not program 1
> >
> >on all the banks of program you copy and paste the above (replacing
> >my example names with YOUR file names), so it knows to associate ALL
> > the code to the stamp project
> >
> >'{$STAMP BS2SX,program1.bsx,program2.bsx,program3.bsx}
> >
> >on each bank end you just run the next bank, after you fill up bank
> >0 you use run 1, after you fill up bank 1 you use run 2.......etc.
> >
> >
> >steve
> >
> >
> >hope that wasnt TOO confusing....sorry.
> >
> >
> Hello,
>
> I'm controlling some serial motor controllers with a BS2p and, by accident,
I've connected the motor power to the amplifier reversed which blows up the
amplifier (litterally!). I'm looking for a good way to protect the controller
from reverse polarity. My first thought was to use a bridge rectifier or just a
fat rectifier diode in line, but there is an undesirable voltage drop.
>
> Any suggestions?
>
> Thanks,
> Stewart
>
> --
> Stewart Mayer, stewlist@k... on 04/22/2002
>
> To UNSUBSCRIBE, just send mail to:
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of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Place a fuse in the power lead. Then place a high current diode
(reverse biased) behind the fuse to ground. Should you ever connect the
power leads backwards again, the diode will conduct and blow the fuse.
Since the diode will do it's best to clamp the voltage to about .7 volts,
your motor controller won't see more than that voltage and only briefly.
--- Jay Nugent
> I'm controlling some serial motor controllers with a BS2p and, by accident,
> I've connected the motor power to the amplifier reversed which blows up the
> amplifier (litterally!). I'm looking for a good way to protect the
> controller from reverse polarity. My first thought was to use a bridge
> rectifier or just a fat rectifier diode in line, but there is an undesirable
> voltage drop.
>
> Any suggestions?
>
> Thanks,
> Stewart
>
> --
> Stewart Mayer, stewlist@k... on 04/22/2002
>
>
>
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>
>
>
>
>
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>
>
"Those that sacrifice essential liberty to obtain a little temporary safety
deserve neither liberty nor safety." -- Ben Franklin (1759)
+
+
| Jay Nugent jjn@n... (734)971-1076 (734)971-4529/Fax |
| Nugent Telecommunications [noparse][[/noparse]www.nuge.com] (734)649-0850/Cell |
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+
+
9:01pm up 81 days, 10:26, 10 users, load average: 0.00, 0.00, 0.00
thing is going to be powered from dozens of power sources over the next few
years and I know that an intern will sometime make a reverse connection if I
don't do it myself. I like the mosfet idea, but I would hate to have to replace
it if static electricity killed it. I also like the classic fuse idea, I think
I'll try to implement that if I can find some panel mount fuse holders at
digikey.
Thanks,
Stewart
On Mon, 22 Apr 2002 21:10:25 -0400 (EDT), Jay Nugent wrote:
>Greetings, Place a fuse in the power lead. ·Then place a high
>current diode (reverse biased) behind the fuse to ground. ·Should
>you ever connect the power leads backwards again, the diode will
>conduct and blow the fuse. ·Since the diode will do it's best to
>clamp the voltage to about .7 volts, your motor controller won't see
>more than that voltage and only briefly.
>
>--- Jay Nugent
>
>
>>I'm controlling some serial motor controllers with a BS2p and, by
>>accident, I've connected the motor power to the amplifier reversed
>>which blows up the amplifier (litterally!). ·I'm looking for a good
>>way to protect the controller from reverse polarity. ·My first
>>thought was to use a bridge rectifier or just a fat rectifier diode
>>in line, but there is an undesirable voltage drop.
>>
>>Any suggestions?
>>
>>Thanks, Stewart
>>
>>--
>>Stewart Mayer, stewlist@k... on 04/22/2002
>>
>>
>>
>>To UNSUBSCRIBE, just send mail to: basicstamps
>>-unsubscribe@yahoogroups.com from the same email address that you
>>subscribed. ·Text in the Subject and Body of the message will be
>>ignored.
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>>
>>
>>
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>>
>>
>
>
>"Those that sacrifice essential liberty to obtain a little temporary
>safety deserve neither liberty nor safety." ·-- Ben Franklin (1759)
>+
>
>----+ | Jay Nugent · jjn@n... · ·(734)971-1076 · ·(734)971
>-4529/Fax | | Nugent Telecommunications ·[noparse][[/noparse]www.nuge.com] · · (734)649
>-0850/Cell | | · Internet Consulting/Linux SysAdmin/Engineering &
>Design/ISP Reseller | | ISP Monitoring [noparse][[/noparse]www.ispmonitor.net] ISP &
>Modem Performance Monitoring | | Web-Pegasus · ·[noparse][[/noparse]www.webpegasus.com]
>Web Hosting/DNS Hosting/Shell Accts| | LinuxNIC, Inc.
>[noparse][[/noparse]www.linuxnic.net] · Registrar of the .linux TLD | +
>
>----+ 9:01pm ·up 81 days, 10:26, 10 users, ·load average: 0.00,
>0.00, 0.00
>
>
>To UNSUBSCRIBE, just send mail to: basicstamps
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>
--
Stewart Mayer, stewlist@k... on 04/23/2002
protection. I've seen them, think I can find them? Been looking
through the net and archives, no luck.
Anybody have a good cheep one for 6-12Vdc?
Thanks
Ian
one beefy enough to handle the amount of current that will flow through
it, and keep in mind that it will drop about 0.7 volts.
+ Input
>|
circuit
-- Jon Williams
-- Applications Engineer, Parallax
-- Dallas Office
Original Message
From: iphillipsca [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=w93_aWtc5Oy9u9TncVsD3N9wc5s5QUHvMzoHsgh-FjNy55gVX-G4qFn_igSOgvRGMzRMezDhruBtOAvHwg]iphillips@s...[/url
Sent: Monday, December 29, 2003 9:26 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Reverse polarity protection
I know there are a few simple circuits for reverse battery hookup
protection. I've seen them, think I can find them? Been looking
through the net and archives, no luck.
Anybody have a good cheep one for 6-12Vdc?
Thanks
Ian
To UNSUBSCRIBE, just send mail to:
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This message has been scanned by WebShield. Please report SPAM to
abuse@p....
+Vin ---(~.25amp fuse)
circuit
|
_
^ diode
|
|
Gnd.
Simply use a fuse suitable for the load, and a diode that is rated for more
current than the fuse.
KF4HAZ - Lonnie
From: "Jon Williams" <jwilliams@p
> The simplest is a diode, like the 1N400x series. You just need to get
> one beefy enough to handle the amount of current that will flow through
> it, and keep in mind that it will drop about 0.7 volts.
>
> + Input
>|
circuit
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
Original Message
> From: iphillipsca [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=-SaIenQmhJxKcjkcF27O8kv_hI9_KdrvKE2jEaZcdQYYxMnfd8mqsr1AyozzF-gLjkDxZTW7NxvQPpmgUBSvgrc]iphillips@s...[/url
> Sent: Monday, December 29, 2003 9:26 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Reverse polarity protection
>
>
> I know there are a few simple circuits for reverse battery hookup
> protection. I've seen them, think I can find them? Been looking
> through the net and archives, no luck.
> Anybody have a good cheep one for 6-12Vdc?
> Thanks
> Ian
Ian
Original Message
From: FalconWireless Tech Support - KF4HAZ
[noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=yzJUj0YWvgK-qpAPveLy_gkK6-YH4HcqL_-7fcm3mbaIaTHHKCh4DKf96Vtpi9Pu_0gPP7JZjBA6HfvJJqMuo_zFi-XIkg]techsupport@f...[/url
Sent: December 29, 2003 10:46 AM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Reverse polarity protection
Or if he is using 6v battery power and can not afford the diode drop
+Vin ---(~.25amp fuse)
circuit
|
_
^ diode
|
|
Gnd.
Simply use a fuse suitable for the load, and a diode that is rated for
more current than the fuse.
KF4HAZ - Lonnie
From: "Jon Williams" <jwilliams@p
> The simplest is a diode, like the 1N400x series. You just need to get
> one beefy enough to handle the amount of current that will flow
through
> it, and keep in mind that it will drop about 0.7 volts.
>
> + Input
>|
circuit
>
> -- Jon Williams
> -- Applications Engineer, Parallax
> -- Dallas Office
>
>
>
Original Message
> From: iphillipsca [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=84lXdQ89pZeFd44aaqJ0G9JHe-t3u8zWc47SzgNsTupyCOlYgdQZlB9icd6nx0R18yZABh2T0zsJ7VkWbwj8Ow]iphillips@s...[/url
> Sent: Monday, December 29, 2003 9:26 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Reverse polarity protection
>
>
> I know there are a few simple circuits for reverse battery hookup
> protection. I've seen them, think I can find them? Been looking
> through the net and archives, no luck.
> Anybody have a good cheep one for 6-12Vdc?
> Thanks
> Ian
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By the time you add the current limiting resistor the circuit would see full
reverse voltage and the LED would light to tell you the
circuit was fried!
Also the fuse would not blow.
KF4HAZ - Lonnie
From: "Ian Phillips" <iphillips@s
> Just to go one further, could the diode be an LED? Lights when reversed.
>
> Ian
>
>
Original Message
> From: FalconWireless Tech Support - KF4HAZ
> [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=svtZjEh8WM6HcKy3Z0IqkEFeq7-4JfnRPjoiimLBZWj1-AE29F16WGGn3bciuKroCWABgS6P4W8j868wxq00EdoNm95v7Y1NCw]techsupport@f...[/url
> Sent: December 29, 2003 10:46 AM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] Reverse polarity protection
>
> Or if he is using 6v battery power and can not afford the diode drop
>
> +Vin ---(~.25amp fuse)
circuit
> |
> _
> ^ diode
> |
> |
> Gnd.
>
> Simply use a fuse suitable for the load, and a diode that is rated for
> more current than the fuse.
>
> KF4HAZ - Lonnie
>
>
From: "Jon Williams" <jwilliams@p
>
> > The simplest is a diode, like the 1N400x series. You just need to get
> > one beefy enough to handle the amount of current that will flow
> through
> > it, and keep in mind that it will drop about 0.7 volts.
> >
> > + Input
>|
circuit
> >
> > -- Jon Williams
> > -- Applications Engineer, Parallax
> > -- Dallas Office
> >
> >
> >
Original Message
> > From: iphillipsca [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=RhGqyYPSwAAK-yq9I103vmHJXOdka-uJM_cVBbHZfTYYIGnXUhmp_HU9bnc3Xsbgbuj1MClvF3H98GSwXQ]iphillips@s...[/url
> > Sent: Monday, December 29, 2003 9:26 AM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] Reverse polarity protection
> >
> >
> > I know there are a few simple circuits for reverse battery hookup
> > protection. I've seen them, think I can find them? Been looking
> > through the net and archives, no luck.
> > Anybody have a good cheep one for 6-12Vdc?
> > Thanks
> > Ian
circuit from reverse polarity connection.
There is no explination on the schematic, I will explain here.
The circuit uses a DPDT relay and a diode.
When the correct polarity is applied to the circuit, current through the
relay coil cause the NO contacts of the coil to close supplying power to your
circuit with the correct polarity.
The LED is reverse biased and off.
If the polarity to the circuit is connected incorrectly, the relay coil does
not close due to the reverse biased diode, and the LED will turn on
indicating the connections to the circuit are incorrect.
There is no diode across the relay coil as there is no component such as a
transistor that will be damaged when the circuit connections are disconnected.
Ken
[noparse][[/noparse]Non-text portions of this message have been removed]
writes:
There is no diode across the relay coil as there is no component such as a
transistor that will be damaged when the circuit connections are disconnected.
Ken
But there should be a diode across the relay coil.......What was I thinking
of?????
Ken
[noparse][[/noparse]Non-text portions of this message have been removed]
to use a circuit of this type.
Richard
Original Message
From: <smartdim@a...>
To: <basicstamps@yahoogroups.com>
Sent: Saturday, June 19, 2004 12:35 AM
Subject: Re: [noparse][[/noparse]basicstamps] Reverse Polarity Protection
>
>
> In a message dated 6/18/2004 10:21:10 PM Pacific Standard Time, SmartDim
> writes:
>
> There is no diode across the relay coil as there is no component such as
a
> transistor that will be damaged when the circuit connections are
disconnected.
>
> Ken
>
>
>
> But there should be a diode across the relay coil.......What was I
thinking
> of?????
>
> Ken
>
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>
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> [noparse][[/noparse]Scanned by AwesomeNet Anti-Virus]
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>
that will allow you to use ac or dc?
--- In basicstamps@yahoogroups.com, "Richard" <rwskinner@a...> wrote:
> Thanks, Looks like a simple but clever idea. I can think of
numerous ways
> to use a circuit of this type.
>
> Richard
>
Original Message
> From: <smartdim@a...>
> To: <basicstamps@yahoogroups.com>
> Sent: Saturday, June 19, 2004 12:35 AM
> Subject: Re: [noparse][[/noparse]basicstamps] Reverse Polarity Protection
>
>
> >
> >
> > In a message dated 6/18/2004 10:21:10 PM Pacific Standard Time,
SmartDim
> > writes:
> >
> > There is no diode across the relay coil as there is no component
such as
> a
> > transistor that will be damaged when the circuit connections are
> disconnected.
> >
> > Ken
> >
> >
> >
> > But there should be a diode across the relay coil.......What was
I
> thinking
> > of?????
> >
> > Ken
> >
> >
> >
> > [noparse][[/noparse]Non-text portions of this message have been removed]
> >
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the
Subject and
> Body of the message will be ignored.
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> > [noparse][[/noparse]Scanned by AwesomeNet Anti-Virus]
> >
> >