Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: Hasan999 on February 19, 2010, 02:29:32 PM

Title: Axon Microcontroller - High Current Supply Hazards?
Post by: Hasan999 on February 19, 2010, 02:29:32 PM
Hi, I've built the robot using Axon Microcontroller that is suppose to handle 26 Hitec Standard Servos simultaneously.

Been struggling with getting the right supply current (power) so that all 26 servos can take the load.

I tried with 6V (two batteries combined in parallel, hence: 3200mAh) but it didn't solve the problem.

Now, I'm going to try with a huge DC Power Supply Unit, keeping the voltage to 6V, but testing with different Current, that can go up to 10A !!!...

My question is, is there any hazard, in supplying 10A current, to the microcontroller, servos, etc? (if so, What is the maximum current that I can supply)

Thanks
Title: Re: Axon Microcontroller - High Current Supply Hazards?
Post by: SmAsH on February 19, 2010, 03:24:22 PM
I'm not sure, but i think the axon traces can take 3A safely but probably a bit more...
Have you considered making a breakout board with as giant power bus for the servos?
The first step to working out this problem is finding the stall current of the servos, do that.
Title: Re: Axon Microcontroller - High Current Supply Hazards?
Post by: Soeren on February 19, 2010, 03:50:36 PM
Hi,

Quote from: Hasan999 on February 19, 2010, 02:29:32 PM
I tried with 6V (two batteries combined in parallel, hence: 3200mAh) but it didn't solve the problem.
If the cells are freshly charged (and not worn down), you should be able to get 10A from them with no problem.
Does it work with 1 servo? 3 servos? 6 servos?
Title: Re: Axon Microcontroller - High Current Supply Hazards?
Post by: Webbot on February 19, 2010, 04:00:32 PM
This is taken from the Axon datasheet pages on this site :-

The Axon has been tested to handle at least 5A on each power bus, but can in theory handle ~13A. Placing your high current draw components near the battery can up this number. This limitation is entirely based on power bus tracing thickness, meaning that if you require higher currents you must make your own separate power bus.