[Dprglist] Donkey Car charger questions

[Thalanayar Muthukumar]

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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