[sdiy] I’m Looking for a simple circuit that simulates this type of battery (12V 9AH).... I forgot to say..

Oren Leavitt obl64 at ix.netcom.com
Sun Jul 2 23:46:37 CEST 2023


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.

On 7/2/23 4:59 PM, Jean-Pierre Desrochers wrote:
>
> I forgot to say in my previous post that I tried using an external 
> power supply
>
> To simulate a battery but that didn’t work. The charging circuit takes 
> over
> on the ext supply and there is no way I can vary the ext supply voltage..
> The needed battery simulator circuit should have a trimmer so I can 
> adjust the voltage
> to simulate a discharging battery. (There are threshold voltages in 
> the charging circuit that needs to be tested)
>
> ******************************
>
> Hi list,
>
> I have a battery charger circuit that I need to fix and do some tests on..
>
> It is supplied from a 15VDC (22VDC actually) at 1.2amp and its job
> is to charge a 12VDC 9AH battery for a small CRATE TAXI TX-50D 
> portable guitar amplifier.
>
> Its battery is done with a very high ESR value.. No recharging possible.
>
> Now before I go buy a new one I’m Looking  for a simple circuit that 
> simulates this type of battery (12V 9AH)
>
> And will be connected to the battery terminals of my charger..
>
> Any clue what this circuit would look like ?
>
> Here is my charger schematic section :
>
>
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