Dual +3.3v/+5.0-6.0v Power Supply For Servos and IMU

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Joined: Sun Dec 24, 2006 8:11 pm
Location: Greenbelt, Maryland

Dual +3.3v/+5.0-6.0v Power Supply For Servos and IMU

Post by BobCochran » Sun Dec 24, 2006 9:08 pm

Can someone point me to a circuit which can be put on a small PCB that can take unregulated 11.1v power from a lithium polymer battery and regulate it down to one output of +3.3v and one output of at least +5v to a maximum of +6v. In other words, a regulator capable of producing two different voltage outputs.

The +3.3v output will be connected to an inertial measurement unit. This is just a PCB with two ICs.

The +5 to +6v output will be connected to two servos. Both are GWS brand S03N 2BB units modified for continuous rotation.

I am comfortable soldering a PCB. Perhaps there is a kit that can fill this need? I'm still learning how to read circuit diagrams, but I should be able to manage them.

As a related question, will the current draw from the servos starting up and then running really be a lot? Would it interfere with the 3.3v output, causing a voltage drop?



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Joined: Wed Mar 07, 2007 7:22 pm

Battery with outputs 5 or 3.3V

Post by bic » Wed Mar 07, 2007 7:25 pm

You may want to consider the units we offer at www.bodhilabs.com.
They are perfect for small application, can can run off either 1 or 2 batery cells.


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Post by arealperson » Wed Mar 28, 2007 2:49 am

Somewhere on your battery it should tell you how many amps hrs. it can supply. If you have a meter (you should if you are going to do any work in electronics) you can see what the servo draws under load. Most servos have very small motors, a good guess would be about 600 ma under load. So if your battery can supply at least 1.5 amp/hr you will be fine.

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Re: Dual +3.3v/+5.0-6.0v Power Supply For Servos and IMU

Post by ericvb » Sun Feb 14, 2010 6:36 pm

Hi Bob,

I'm trying to compile the Balancing Bot source code.
Can you help me with this ?

Eric V. Barreto.

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