[Dprglist] Donkey Car charger questions

[Thalanayar Muthukumar]

I interchanged the wires and charged my batteries and have a moving Donkey
car now. Thanks Doug and Harold.

Regards.
- Kumar

On Tue, Nov 2, 2021 at 1:25 PM Thalanayar Muthukumar <tnkumar at gmail.com>
wrote:

> Thanks Doug for your quick response.
>
> [image: image.png]
>
> This is how my battery connector looks (Red wire to the square hole and
> black wire to the round hole)
> On the terminal connector that connects to the battery, they have
> connected the Red to round and black to square (certainly an error)
>
> Doug -> As you say, I do believe it is a bad terminal connector and I am
> glad that I did not plug it into the wall and to the battery.
> I can see if I can interchange the wires on the connector, or get a new
> connector.
>
> Regards.
> - Kumar
>
>
>
>
>
> On Tue, Nov 2, 2021 at 10:57 AM Doug Paradis <paradug at gmail.com> wrote:
>
>> Kumar,
>>       Looks like  a true issue with the wiring. Do not plug into the wall
>> until you sort it out. With the battery disconnected, measure the voltage
>> at the last connection. Is the polarity of the voltage reversed (ie., black
>> to red positive)? I am assuming that the purpose of the additional bit of
>> wire is to match the terminals of the battery. Please show a picture of the
>> end of the battery connector so we can tell what type it is. Same for the
>> connector that is going into the battery connector now.  Connectors have a
>> specification that can be looked up on the web. It looks like you have a
>> bad terminal converter.
>>
>> Regards,
>> Doug P.
>>
>> On Mon, Nov 1, 2021 at 10:52 PM Thalanayar Muthukumar via DPRGlist <
>> dprglist at lists.dprg.org> wrote:
>>
>>> This is how my current Donkey Car battery looks
>>> [image: image.png]
>>> The voltage between Red and Black is ~2.1V with Red being positive with
>>> respect to the black. This is because the battery has been lying unused for
>>> years.
>>>
>>> When I connect the charger to mains and measure voltage, it is ~14V with
>>> Red wire being positive with respect to black. (It is expected to be high
>>> as it is no load voltage)
>>>
>>> The picture below shows how the charger connector mates with the battery
>>>
>>> [image: image.png]
>>>
>>> If you see the mating point marked with Red Arrow, the red wire from the
>>> charger is connected to the black of the battery and black from the charger
>>> to the red of the battery
>>> It does not seem correct to me.
>>>
>>> This is the charger I got -
>>> https://www.amazon.com/dp/B088NTQRFF?psc=1&ref=ppx_yo2_dt_b_product_details
>>>
>>> Am I missing something or is the charger not correct?
>>> I hesitate to power the charger and connect to the battery.
>>>
>>> Suggestions?
>>>
>>> Regards.
>>> - Kumar
>>> _______________________________________________
>>> DPRGlist mailing list
>>> DPRGlist at lists.dprg.org
>>> http://lists.dprg.org/listinfo.cgi/dprglist-dprg.org
>>>
>>
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