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Branching 9V to a Sumobot — Parallax Forums

Branching 9V to a Sumobot

CaipiCaipi Posts: 11
edited 2006-04-23 07:04 in Robotics
Hello,

On the PCB schematics, I see that there is a LM2936 Voltage regulator. I also notice that the Servos get the unregulated input voltage and the rest of the ciruit the regulated voltage.
what would happen if I connect 9V to the Sumobot?

I suppose that the circuit will still be ok since the spec for the LM2936 allows a max input of 60V. If I only use the 9V for a short period in time, will the servo survive?

I plan to do it by adding another two ·1.5V abbtery to the existing battery pack.

Does anyone has experience with this?

Thx

Post Edited (Caipi) : 4/22/2006 6:44:44 PM GMT

Comments

  • CatharsisCatharsis Posts: 27
    edited 2006-04-22 19:47
    The voltage will go straight to the servos. 9v is a bit high for most servos.
  • allanlane5allanlane5 Posts: 3,815
    edited 2006-04-22 21:31
    You can drive the servo's with the Vdd voltage -- of course, that will drive them with 5 volts.

    Typically, people add ONE 1.5 volt alkaline (or ONE 1.2 volt Ni-Cd or Ni-mH) to get 6 or 7.5 volts. Most servo's can handle the 7.5 volts. 9-volts will probably cause over-heating, sparking, and may blow-out the servo IC.
  • CaipiCaipi Posts: 11
    edited 2006-04-23 07:04
    Thx for the info. I wiil limit myself to one additional 1.5V battery.

    I will do this only for Sumo Fight, not for Line Following. This should save the servos a litte.
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