Main > Main Forum

Help me plan and execute auto 4-8 way joystick replacement?

Pages: << < (3/3)

Le Chuck:


--- Quote from: Bramlet on March 06, 2012, 05:44:42 pm ---OK, I got my servos and controllers, I know I only need one of each but I got extra to play with. I soldered up the connectors on one of the 6 channel controllers.

I also got about a dozen of these universal wall wart power adapters. I can do 3, 4.5, 6, 7.5, 9, or 12 volts at 500mA. These servos supposedly use 450mA at 6v and 350mA at 4.8v with no load operating. Does this mean my bonanza of free wall warts are duds or can I use one for this project?

--- End quote ---

Use the 6v one and all will be well.  The trick is to have enough mA.  Having 500mA on the line will not affect the device using 450mA, it will just take what it needs... like an electron buffet.  Just make sure you get the polarity straight from wart to servo or you'll need that spare.

Bramlet:

So there is no load really with this project but for the other ones, if I have a load on the motor and I'm using these adapters will I have problems do you think?

Le Chuck:

No, the most those servos draw will be 6v 450mA.  No matter the application it won't go above that for that servo so the wall wart providing 6 at 500 will suffice for all.  Don't worry about the no load draw.  

Edit:  For example, I'm running mine (a 6001HB) on a 5v 500mA source with no issue and it rates 6v for load but everybody at the Pololu forums indicated that running under will only cause it to tap out earlier.  Considering that stall torque @ 4.8V is 5.8 kg·cm it could probably move 4 joysticks in line before stalling out and I'm doing just one. It's being powered through the USB via a belkin hub and runs like a champ.  Since the warts were free I say rock on with those and don't sweat the power.  You've got it covered. 

Pages: << < (3/3)

Go to full version