Re: [TR] gas gauge and voltage regulators

[Dave <dave1massey@cs.com>]

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That sounds like a challenge.  Stand by.  ;-)
 

 

Dave Massey


 

 

-----Original Message-----
From: Randall <TR3driver@ca.rr.com>
To: triumphs <triumphs@autox.team.net>
Sent: Fri, Jul 3, 2015 7:12 am
Subject: Re: [TR] gas gauge and voltage regulators


> Electronics is polarity sensitive although an electronic 
> stabilizer
(regulator) can be designed to work with wither 
> polarity by including a full
wave bridge and retuning the 
> circuit to compensate,

Hmm, maybe I'm
missing something.  Seems to me that a full wave bridge wouldn't do, because the
senders have to return to chassis
ground.  The only way I can see to implement
this would be basically two complete regulator circuits with steering diodes so
only
one is functional.  

Lots easier to just use a circuit that matches the
car polarity, which is what the vendors do.  Eg Moss sells 131-555 for
negative
ground, and 131-556 for positive.

It's also pretty easy to build
one for yourself.  I used the can from an old stabilizer (with bad contacts)
similar to what's
shown
here
<http://bob_skelly.home.comcast.net/~bob_skelly/voltageStabilizer/voltageStabilizer.html>
But
there's no reason you have to use the can, it's just a convenient package (with
terminals).

If you want positive ground instead of negative, use a 7910
instead of the 7810, and switch the polarity of the capacitors.

-- Randall 



** triumphs@autox.team.net **

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<font color='black' size='4' face='Arial, Helvetica, sans-serif'><font 
size="4">That sounds like a challenge.&nbsp; Stand by.&nbsp; ;-)</font>

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<div style="clear:both"><font size="4">Dave Massey</font><br>

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<div 
style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original 
Message-----<br>

From: Randall &lt;TR3driver@ca.rr.com&gt;<br>

To: triumphs &lt;triumphs@autox.team.net&gt;<br>

Sent: Fri, Jul 3, 2015 7:12 am<br>

Subject: Re: [TR] gas gauge and voltage regulators<br>

<br>




<div id="AOLMsgPart_1_89c59062-16c6-41da-8592-fbaa0614b426" style="margin: 
0px;font-family: Tahoma, Verdana, Arial, Sans-Serif;font-size: 12px;color: 
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<pre style="font-size: 9pt;"><tt>&gt; Electronics is polarity sensitive 
although an electronic 
&gt; stabilizer
(regulator) can be designed to work with wither 
&gt; polarity by including a full
wave bridge and retuning the 
&gt; circuit to compensate,

Hmm, maybe I'm
missing something.  Seems to me that a full wave bridge wouldn't do, because the
senders have to return to chassis
ground.  The only way I can see to implement
this would be basically two complete regulator circuits with steering diodes so
only
one is functional.  

Lots easier to just use a circuit that matches the
car polarity, which is what the vendors do.  Eg Moss sells 131-555 for
negative
ground, and 131-556 for positive.

It's also pretty easy to build
one for yourself.  I used the can from an old stabilizer (with bad contacts)
similar to what's
shown
here
&lt;<a 
href="http://bob_skelly.home.comcast.net/~bob_skelly/voltageStabilizer/voltageStabilizer.html";
 
target="_blank">http://bob_skelly.home.comcast.net/~bob_skelly/voltageStabilizer/voltageStabilizer.html</a>&gt;
But
there's no reason you have to use the can, it's just a convenient package (with
terminals).

If you want positive ground instead of negative, use a 7910
instead of the 7810, and switch the polarity of the capacitors.

-- Randall 



** <a href="mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> **

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</tt></pre>
</div>

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