Comments for Lucky Larry

Comment 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.

Comment on Obstacle avoidance Arduino robot – build your own larryBot 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.

Comment on Control a DC motor with Arduino and L293D chip by larry

larry — Tue, 07 Feb 2012 14:05:57 +0000

Hey,

Not sure I can be of much use here, all capacitors work the same, what will be different is it’s effective temperature range and capacitance. But considering this is a small circuit I can’t imagine it’ll actually make much of a difference, if the capicitance is the same but a different construction.

Comment on Obstacle avoidance Arduino robot – build your own larryBot 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

Comment on Obstacle avoidance Arduino robot – build your own larryBot by bernard

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

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

Comment on Control a DC motor with Arduino and L293D chip by bernard

bernard — Sun, 05 Feb 2012 12:01:23 +0000

very helpful.thanks a lot for this tutorial.

Comment on Control a DC motor with Arduino and L293D chip by Shahin

Shahin — Sat, 04 Feb 2012 13:18:16 +0000

Hello there, I like your project and decided to make one.

I bought these http://www.ebay.nl/itm/290630163057?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_3283wt_915

AVX – 0.22uF 220nF 50V Y5V 1210 SMD Capacitors – 150pcs

from ebay but I think these are the wrong capacitors or am I wrong?

Can I use these or not?

Please reply, because I might cancel the purchase if these are wrong

Comment on Arduino: Controlling the Robot Arm by dudleyjohn

dudleyjohn — Sat, 04 Feb 2012 03:55:50 +0000

I can use the wiimote as a sensor for an interactive whiteboard. It is pretty precise in the 2 dimensions of the screen. I can click on small buttons and such. The wiimote is actually a hi res IR camera. Have you seen Johnny Chung Lee’s wiimote projects? they are pretty amazing. I would be surprized if something like what I’m imagining can’t be done. If it works, it would bypass the whole encoder/stepper technology and use a human-like guidance system to contol the motors. If someone could write the controlling software, which I don’t know how to do.

Comment on Sending mail and attachments from Perl using NET::SMTP by abhinay

abhinay — Fri, 03 Feb 2012 21:49:12 +0000

i am getting below error while executing the above Perl script

[/home/abc/cde/mnd] s-t$ test.pl
Scalar found where operator expected at test.pl line 25, near “”Content-type: multipart/mixed;ntboundary=”$boundary”
(Missing operator before $boundary?)
String found where operator expected at test.pl line 25, near “$boundary”n”"
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Scalar found where operator expected at test.pl line 32, near “”Content-Type: application/text; name=”$attachFile”
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Scalar found where operator expected at test.pl line 33, near “”Content-Disposition: attachment; filename=”$attachFile”
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String found where operator expected at test.pl line 33, near “$attachFile”n”"
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Possible unintended interpolation of @csvn in string at test.pl line 35.
syntax error at test.pl line 25, near “”Content-type: multipart/mixed;ntboundary=”$boundary”
Global symbol “$boundaryn” requires explicit package name at test.pl line 27.
Global symbol “$boundaryn” requires explicit package name at test.pl line 31.
syntax error at test.pl line 32, near “”Content-Type: application/text; name=”$attachFile”
syntax error at test.pl line 33, near “”Content-Disposition: attachment; filename=”$attachFile”
Global symbol “@csvn” requires explicit package name at test.pl line 35.
Bareword “DATA” not allowed while “strict subs” in use at test.pl line 15.
Execution of test.pl aborted due to compilation errors.

Comment on Obstacle avoidance Arduino robot – build your own larryBot 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.