Comments on: Obstacle avoidance Arduino robot – build your own larryBot

By: larry

larry — Tue, 07 Feb 2012 14:19:44 +0000

I would use a different h bridge chip entirely, voltage seems to be ok for most but it’s the current that’s the issue. Too much current will burn the chip out and stall the motors.

By: larry

larry — Tue, 07 Feb 2012 14:18:54 +0000

for 58, I measured the time the signal took over a set distance.

In terms of the averages, it’s probably the wrong way of doing it e.g. taking multiple readings and then an average. What I should have done is remove any values that are outside of a threshold.

By: larry

larry — Sun, 05 Feb 2012 14:04:37 +0000

You may want to actually improve this or make the project your own rather than just copying it wholesale.

I really should start to leave more bugs in the code to make you think about it before just copying it all

By: bernard

bernard — Sun, 05 Feb 2012 12:02:54 +0000

great! i’m going to use this as my project. thanks a lot

By: JD

JD — Wed, 01 Feb 2012 16:00:11 +0000

also in your in OBR 0.5 .maybe i can experience the same problem because the SN754410 is not available. can i amplify 0.6 A to 2 A or more?? and i’m trying to create a larger size of this robot. 2 ft long and 1.5 ft wide. so bigger motors and much current is needed.

By: JD

JD — Wed, 01 Feb 2012 15:53:07 +0000

why distance = pulstetime/ 58? why not other number. ^^ and cant understand some of the code. I have less experience in programming. ” for (int thisReading = 0; thisReading < numOfReadings; thisReading++) {
readings[thisReading] = 0;" and the next one.
total= total – readings[arrayIndex];
readings[arrayIndex] = distance;
total= total + readings[arrayIndex];
why the total will subtract then in the next code will add?? i try to understand your code so that i can create my own.

By: EE Senior Design » Blog Archive » [Team DSSP ] – Prototype II Final Report: [Smart Mailbox for Smart Wheelchair]

Fri, 18 Nov 2011 02:11:46 +0000

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By: Eazye

Eazye — Thu, 10 Nov 2011 22:24:34 +0000

also how many links does the tracks have??

By: Eazye

Eazye — Wed, 09 Nov 2011 20:31:04 +0000

thanks for the quick reply.

just wondering what wheels did you use for the tracks?? I see its a large drive sprocket on top..

but on the bottom, is it a small drive sprocket on the front and small wheels behind it OR just all small wheels for the bottom??

By: larry

larry — Mon, 07 Nov 2011 21:11:08 +0000

umm. can’t remember, I don’t think I was too specific on that, just cut a piece down until it was small enough to fit.