Need response from a Castle tech for MMM question

[TruckBasher]

I only run it on 6S A123 close to 5S lipo....

btw the voltage im talking about is the BEC supplying the ICs and Brain

[lincpimp]

Looks like I will be doing the mod. One of my 2 V2s died, and I would like to get it running, if only to use as a backup...

I think I will stick to a rx pack, as that is already setup nicely in the lst, complete with an on/off switch. And the addl weight is neither here nor there in that heavy truck.

I may also call castle, and see if they will send me a replacement v2 with a mailer. Save me a few bucks on return postage maybe??? What is their number for things of this nature?

[jhautz]

Does anyone know what the max voltage the MMM "brains" can run on? I was thinking about doing this mod to my dead V2, but instead of using an external BEC or Rx pack I was thinking about running the whole thing on a plug that would tap into the main pack balancing plug and just run it off of 2 cells in the main pack. I know my servo and Rx can handle the 2s voltage, its just a matter of if the MMM brains can take the full 2s charge voltage. Would 8.4V fry it?


Before anyone points out that I will be draining 2 cells and creating an imbalance..... I know. But I have an excelent charger that balances the cells perfectly no matter how badly they are out and I run a high enough LVC setting that I dont think it will be a problem.

[jhautz]

Brian,

How is your OPTO modified controller doing? Still running OK?

I was on the phone with a CC tech this morning and what he was telling me seems fishy. He told me that on my V2 that has a misbehaving BEC (sometines works and puts out 6.4v and sometimes only 2.0v depending on what it feels like doing), if I disconect the red wire on the Rx cable and power the Rx with another power source that the MMM will run. He said the the "brains" run on 3.2v on another circut and that the internal BEC wount effect that. It doesnt seem right to me, otherwise why wouldnt all of us just be able to run the controller with a RX pack or external BEC when the when the internal BEC fails. I told him what he was explaining didn't make sense based on what I saw in my totally failed units. If what he said was accurate the LEDs should still lite on the MMM unit itself even without a Rx plugged into it. But he insisted that the internal BEC should effect the Barin board.

I still think he doesnt know what he is talking about. I will do some playing tonight to confirm it.

I'm right... Right?

BTW... I asked him about doing the "OPTO Mod" on it and he said that it would void the warantee. Wouldnt make any exceptions either.