[Dprglist] Donkey Car charger questions

[Doug Paradis]

Kumar,
       Looking at the picture you sent I think that you have a Tamiya main
battery plug. See below:
[image: image.png]

Note that positive is the square connector and ground is the round
connector. BTW, this type of plug is considered unreliable and has been
generally replaced with new style plugs.

Regards,
Doug P.

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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