Ryobi cordless driver drill cbd-120vr

[GEARELECTRONICS]

I am looking for the two resistor values located on the small board inside the battery charging stand.

Please help if you know

thanks

[sam_sam_sam]

Re: Ryobi cordless driver drill cbd-120vr

Please post some pictures of this device

[GEARELECTRONICS]

Re: Ryobi cordless driver drill cbd-120vr

[GEARELECTRONICS]

Re: Ryobi cordless driver drill cbd-120vr

please find attached relevant pictures for RYOBI CORDLESS DRIVER DRILL

[sam_sam_sam]

Re: Ryobi cordless driver drill cbd-120vr

I personally would recommend modifying the charging current and not using a resistor to do it

I would use a LM317 in the current mode and set it 500 to maybe 750 milliamperes at the most

If you have the battery on charger all the time then I would recommend not going more than 300 milliamperes at the most probably be better 150 milliamperes would be better choice

Or use a readymade current controller board and just remove the power jack and wire it to current controller board

Ok one resistor is for the led and the fatter one is the current resistor for charging the battery

One note you need to check the diode and make sure it still works correctly

When I use to use nicad battery pack and had charging boards like this

I would make a little board with a LM317 and set it up to 150 milliamperes and have more than one battery pack and

I would be rocking and rolling again

I would have a LED that would light when the battery was on the charger and basically when the battery was fully charged it barely be light or you would not see it light anymore

How you set this to work correctly and let you know your battery is fully charged you put the LED light with resistor in series LED and put this in series with the regulator input pin and the output pin side or it is the adjust pin I do not remember which pin you have to use output/adjust pin which pin to use but it is easy to figure out which pin to use is when the battery is on the charger it should be lighting up the resistor should 1k ohm for the LED light bulb

The current resistor for the output pin to adjustment pin there is a forum on the data sheet so you can figure out what value you need to use for a certain amount of current

[GEARELECTRONICS]

Re: Ryobi cordless driver drill cbd-120vr

THANKS a lot for your interest, the diode tests ok.
The fat resistor is reading 3.5 ohms.

[stj]

Re: Ryobi cordless driver drill cbd-120vr

that's terrible.
what does the battery say on it?

i'm thinking a proper charge circuit is needed.

[GEARELECTRONICS]

Re: Ryobi cordless driver drill cbd-120vr

Battery says 12v

[stj]

Re: Ryobi cordless driver drill cbd-120vr

nothing else?
i want to know the chemistry.
lithium, NiMH, NiCd etc.

different chemistry needs different charging circuits

[sam_sam_sam]

Re: Ryobi cordless driver drill cbd-120vr

nothing else?
i want to know the chemistry.
lithium, NiMH, NiCd etc.

different chemistry needs different charging circuits

It is a nicad battery pack I use to have there 9.6 volt battery pack way back when Sears way back when had this style as well

I would hope that no manufacturer in there right mind would use this method for charging lithium batteries of any kind you are just asking for problems that would be a big mistake if you do not at least have a protection board at a minimum

[stj]

Re: Ryobi cordless driver drill cbd-120vr

well i'd open the pack and count the cells - dont trust the label.
then go on ali and find an intelligent charging module.
it's worth opening the pack anyway to check they arent "flowered" all over the casing!

if it only has 8cells then you can get a nice charger module that runs from 5v
however, if the diode and fat resistor are o.k. then the battery or drill may be the problem.
or even the psu

[sam_sam_sam]

Re: Ryobi cordless driver drill cbd-120vr

then go on ali and find an intelligent charging module.

I have tried these module before and I was not impressed with the performance results I was getting with them

The biggest issue that I had with them is that they tend to under charge them and because of this running time was crap

Unless you know where to go and get good quality one that charge the battery correctly I would interested in buying some because I still use nicad for some applications because of voltage limitations

And do not cost an arm and a leg for the cost of them

[stj]

Re: Ryobi cordless driver drill cbd-120vr

i have one of these: it gets the job done.
https://www.aliexpress.com/item/4000283329984.html

[sam_sam_sam]

Re: Ryobi cordless driver drill cbd-120vr

i have one of these: it gets the job done.
https://www.aliexpress.com/item/4000283329984.html

Thanks for the website link

[sam_sam_sam]

Re: Ryobi cordless driver drill cbd-120vr

No I have not because I do not any of there tools I am sorry I can not help you with this