Re: receiver question 1b: interference [TANKS]

[JOHN PITTELLI <jplily-at-yahoo.com>]

Amir, 
      You've just developed a gun recoil. People will
pay BIG money fo' dat. What people? I dun no. LOL.So,
ready for the fall season? 

John"rebuilding my tts" Pittelli

 

--- Amir Tahvildaran <adt22-at-drexel.edu> wrote:

> Turns out that it was the receiver power leads on
> the scorpion mini that needed to be snipped.
> 
> Next question :-)
> 
> I'm seeing some kind of interference from the
> trigger firing - I hooked up the second channel (1/2
> channel) of the MRC to a door lock actuator (via a
> relay) and now when I fire and release it, the
> turret rotate jolts a little - the scorpion mini is
> somehow activated (it coincides with the relays
> clicking).  Right now I'm guessing I should have
> diodes somewhere in the mix, but again would
> appreciate any pointers.
> 
> Thanks,
> Amir
>   ----- Original Message ----- 
>   From: Amir Tahvildaran 
>   To: tanks-at-rctankcombat.com 
>   Sent: Wednesday, June 21, 2006 12:50 AM
>   Subject: Re: receiver question 1: powering [TANKS]
> 
> 
>   Awesome, thanks Frank.  This'll be tomorrow nights
> project.
> 
>   -Amir
>     ----- Original Message ----- 
>     From: Frank Pittelli 
>     To: tanks-at-rctankcombat.com 
>     Sent: Wednesday, June 21, 2006 12:35 AM
>     Subject: Re: receiver question 1: powering
> [TANKS]
> 
> 
> Amir Tahvildaran wrote:
> > While testing out my turret I noticed that my
> receiver was powered up 
> > regardless of the state of the switch (controlling
> the 4.8v pack).
> >  
> > The set-up is that I have a 12v battery driving
> the rotate and elevate 
> > motors.  The rotate is using a scorpion mini.  The
> elevate is using one 
> > channel of the MRC controller.  The receiver has
> its own 4 cell battery 
> > pack. 
> 
> All of the black and red connectors on the receiver
> are tied together, 
> including the two power lines.  That is, the power
> comes into the 
> receiver from the 4.8v battery and is distributed to
> all of the servos 
> in parallel.
> 
> Therefore, if you hook a 12v battery up to any of
> the servos, then 
> you'll be adding a 12v battery in parallel with the
> 4.8v battery, 
> resulting in the receiver circuit seeing a voltage
> somewhere between 4.8 
> and 12v.  Although we've been running receivers
> successfully at 7.2v for 
> many years, I'm not sure about going higher than
> that.
> 
> If you want to provide more power to the servos,
> then the proper thing 
> to do is cut the "red" lead between the servo and
> receiver, and hook the 
> "red" servo wire directly to the servo battery.  You
> should also connect 
> the "black" wire from the receiver battery to the
> "black" wire of the 
> servo battery to create a "common ground".  If you
> want a single switch 
> to cutoff both batteries, you can insert it on the
> common ground side of 
> the circuit.  See the attached circuit.
> 
>       Frank P.
> 
> RxServoBatteryCircuit.png
> 


__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com