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<p>A floating adjustable power supply connected to the battery
connectors or the cigarette lighter input (nothing on the 15V
input) should work. Not sure about the high ESR part.<br>
</p>
<div class="moz-cite-prefix">On 7/2/23 4:59 PM, Jean-Pierre
Desrochers wrote:<br>
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<blockquote type="cite"
cite="mid:001201d9ad28$2544e730$6fceb590$@oricom.ca">
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<p class="MsoNormal">I forgot to say in my previous post that I
tried using an external power supply<o:p></o:p></p>
<p class="MsoNormal">To simulate a battery but that didn’t work.
The charging circuit takes over<br>
on the ext supply and there is no way I can vary the ext
supply voltage.. <br>
The needed battery simulator circuit should have a trimmer so
I can adjust the voltage<br>
to simulate a discharging battery. (There are threshold
voltages in the charging circuit that needs to be tested)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">******************************</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoPlainText">Hi list,<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText">I have a battery charger circuit that I
need to fix and do some tests on..<o:p></o:p></p>
<p class="MsoPlainText">It is supplied from a 15VDC (22VDC
actually) at 1.2amp and its job<br>
is to charge a 12VDC 9AH battery for a small CRATE TAXI TX-50D
portable guitar amplifier.<o:p></o:p></p>
<p class="MsoPlainText">Its battery is done with a very high ESR
value.. No recharging possible.<o:p></o:p></p>
<p class="MsoPlainText">Now before I go buy a new one I’m
Looking for a simple circuit that simulates this type of
battery (12V 9AH)<o:p></o:p></p>
<p class="MsoPlainText">And will be connected to the battery
terminals of my charger..<o:p></o:p></p>
<p class="MsoPlainText">Any clue what this circuit would look
like ?<o:p></o:p></p>
<p class="MsoPlainText"><o:p> </o:p></p>
<p class="MsoPlainText"><span
style="color:black;mso-ligatures:none"><img
style="width:6.1458in;height:5.3125in" id="Image_x0020_1"
src="cid:part1.6l3Rbyz0.JQHFURvA@ix.netcom.com" class=""
width="590" height="510"></span><span style="color:black"><o:p></o:p></span></p>
<p class="MsoPlainText"><span style="color:black">Here is my
charger schematic section :<o:p></o:p></span></p>
<p class="MsoPlainText"><span
style="color:black;mso-ligatures:none"><img
style="width:14.1041in;height:5.427in" id="Image_x0020_2"
src="cid:part2.0P7rdkBq.xDeaCev8@ix.netcom.com" class=""
width="1354" height="521"></span><span style="color:black"><o:p></o:p></span></p>
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<br>
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