3D Robotics Comment by Chris Anderson on June 11, 2008 at 11:02pm

I've added all the links to the components. The only missing ones are the Sanyo LB1630 motor controllers. I've got a few but can't find the supplier right now. Anybody got a link?

Comment by Howard Gordon on June 11, 2008 at 11:39pm

http://www.sourceesb.com/ProdSearch.asp?part=LB1630&mfrfilter=37200

3D Robotics Comment by Chris Anderson on June 11, 2008 at 11:46pm

Thanks! I filed a RFQ and got back a few answers, at around $2.00 each. I suppose that will have to do for now, but in the production version we'll switch to a cheaper and smaller SMD motor driver.

Comment by Howard Gordon on June 12, 2008 at 6:55am

Do a search on the Sanyo LB1836M. I imagine in volume these should cost less than $1. They are a fairly direct replacement for the discontinued Fairchild FAN8200 which I've been using.

3D Robotics Comment by Chris Anderson on June 12, 2008 at 7:15am

I'm getting some LB1630M quotes that are now under $1. What's the main advantage of the LB1836M for you? I see it's aimed particularly at stepper motors, while we're just using small brushed motors. Does that make a difference?

Comment by Howard Gordon on June 12, 2008 at 7:28am

The LB1836M is a 2-channel (i.e. 2 motor) driver that handles up to 1A per channel. I believe it is pin-compatible with the Fairchild FAN8200 which I've been using with all of my robots (and blimp controller) for 2+ years, and it has a lower pin count than the LB1630M. I haven't tried the Sanyo part yet, as I managed to locate a surplus stash of FAN8200's, but once that supply is exhausted, I will switch to the LB1836M.

3D Robotics Comment by Chris Anderson on June 12, 2008 at 7:43am

Sounds good. And it's okay to use a motor driver chip designed for stepper motors for small brushed motors like ours? In other words we can ignore the "stepper" designation?

Comment by Howard Gordon on June 12, 2008 at 7:54am

I've used the Fairchild "stepper" part with several thousand N20 motors, so I'd have to assume that is just a marketing designation.

3D Robotics Comment by Chris Anderson on June 12, 2008 at 8:11am

Excellent. We'll get some and if they work well redo the board to replace the three 1630s with two of those. (Note to those following along--these chips are functionally identical. We're just optimizing the board for production efficiencies. Feel free to stick with the 1630s if you want)

In the meantime, I found a source for the 1630s (linked above), so the board component list is now complete.

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