Open Panzer

Open Panzer Help & Info => Open Panzer Help => Topic started by: lauterbacher on April 17, 2018, 10:11:28 PM

Title: TCB Power
Post by: lauterbacher on April 17, 2018, 10:11:28 PM

I  have a 1/6th scale tank that I would like to run the tcb on, but my problem is that it is wired for 24 volts using 2 12 volt batterys. and I see were the tcb can only take up to 15 volts. what can I do.  i'm using 24 volts to my 2 esc's sabertooth 2 x 32 for my 24 volt motors and 24 volts to my small geared motors for  my turret and for gun elevation.

Title: Re: TCB Power
Post by: LukeZ on April 17, 2018, 10:47:07 PM

You could power the TCB from only a single of your 12 volt batteries. But you would need to be very careful doing this, you need to give the TCB absolute ground and 12 volts. In other words, it matters which of the two batteries you use, if you supply it with relative ground and +24 volts you will have problems. So in other words, be sure you use the "low" battery and not the "high" battery.

The other solution which involves a small cost is to get a BEC (battery eliminator circuit) to power the TCB. The TCB runs on 5 volts but it needs a few volts higher than that to function correctly, most BECs output 5 volts exactly but you can find some with variable outputs such as the YEP BEC (https://hobbyking.com/en_us/yep-20a-hv-2-12s-sbec-w-selectable-voltage-output.html) sold by Hobby King, and I'm sure there are others if you look around.

Or just get any of the various LM2596 buck converters sold on Amazon (https://www.amazon.com/RioRand-3-01-0076-Converter-Module-1-23V-30V/dp/B008BHAOQO/ref=sr_1_4?ie=UTF8&qid=1524022762&sr=8-4&keywords=LM2596), eBay (https://www.ebay.com/itm/DROK-LM2596-Numerical-Control-Voltage-Switching-Regulator-DC-Buck-Converter-with/182290375879?epid=2254989235&hash=item2a715a64c7:g:khsAAOSw9GhYcYHd) or wherever for a dime a dozen (well, close). These take a wide variety of input voltages and then you set the output to whatever voltage you want (so long as it is less than the input voltage). Feed the converter 24 volts, and just set the output to anything over 7 volts and feed that to the TCB.

You can continue to use 24 volts to your Sabertooth, they don't have to use the same voltage as the TCB so long as they all share a common ground.

Title: Re: TCB Power
Post by: johnnyvd on April 19, 2018, 12:41:30 AM

Or maybe use a 24V to 12V DC - DC step down converter?
https://nl.aliexpress.com/item/FREE-Shipping-Step-Down-DC-DC-Converter-24V-TO-12V-5A-60W-Waterproof-Car-Power-Supply/32328199934.html?src=google&albslr=221515816&isdl=y&aff_short_key=UneMJZVf&source=%7Bifdyn:dyn%7D%7Bifpla:pla%7D%7Bifdbm:DBM&albch=DID%7D&src=google&albch=shopping&acnt=494-037-6276&isdl=y&albcp=664365076&albag=32654332494&slnk=&trgt=61865531738&plac=&crea=nl32328199934&netw=g&device=c&mtctp=&gclid=CjwKCAjw2dvWBRBvEiwADllhn73Xs50sQDl3aYIumyTvdtQRgbzhFcvBBd0cCB0ADh9Lr6mw-yamdBoCVugQAvD_BwE&gclsrc=aw.ds
 (https://nl.aliexpress.com/item/FREE-Shipping-Step-Down-DC-DC-Converter-24V-TO-12V-5A-60W-Waterproof-Car-Power-Supply/32328199934.html?src=google&albslr=221515816&isdl=y&aff_short_key=UneMJZVf&source=%7Bifdyn:dyn%7D%7Bifpla:pla%7D%7Bifdbm:DBM&albch=DID%7D&src=google&albch=shopping&acnt=494-037-6276&isdl=y&albcp=664365076&albag=32654332494&slnk=&trgt=61865531738&plac=&crea=nl32328199934&netw=g&device=c&mtctp=&gclid=CjwKCAjw2dvWBRBvEiwADllhn73Xs50sQDl3aYIumyTvdtQRgbzhFcvBBd0cCB0ADh9Lr6mw-yamdBoCVugQAvD_BwE&gclsrc=aw.ds)

Title: Re: TCB Power
Post by: lauterbacher on April 21, 2018, 02:24:30 PM

 Thank you for the replys.