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by yaconsult
Sat Sep 17, 2016 5:45 am
Forum: General discussion
Topic: Stepper speed control with Adafruit stepper board
Replies: 3
Views: 1608

Re: Stepper speed control with Adafruit stepper board

So if I just sit in a loop and send step commands to the controller, that is as fast as it can rotate, right? And to get different speeds, you delay between sending the step commands, right? Are you driving it directly with the voltage on for the entire time as you go through the sequence? Measure ...
by yaconsult
Fri Sep 16, 2016 11:55 pm
Forum: General discussion
Topic: Stepper speed control with Adafruit stepper board
Replies: 3
Views: 1608

Stepper speed control with Adafruit stepper board

I am trying to help a friend out with his Maker Faire project. I have programming, sys admin, and hardware experience but am new to stepper motors. The basic functionality of the stepper that he needs is that at some point, it gets turned on and the speed of rotation increases over time at some rate...
by yaconsult
Tue May 10, 2016 5:52 am
Forum: Python
Topic: Looking for sample python code driving stepper and servos
Replies: 5
Views: 2450

Looking for sample python code driving stepper and servos

I am new to working with servos and steppers but experienced with linux and python. I am helping a friend with a project that involves controlling three servos and a stepper motor using both the Adafruit servo board and the Adafruit stepper board. I have been using the DualStepperTest.py ( https://g...
by yaconsult
Tue Aug 05, 2014 6:14 pm
Forum: Arch
Topic: [SOLVED] XWayland is not working
Replies: 9
Views: 5993

Re: [SOLVED] XWayland is not working

Good job! What's your impression of it now that you have used it for a bit? How usable is it? What works and what doesn't?

Thank you for any info you can provide!
by yaconsult
Fri Mar 07, 2014 10:12 pm
Forum: Troubleshooting
Topic: HDMI output stopped working
Replies: 0
Views: 568

HDMI output stopped working

It used to work. To help troubleshooting, I borrowed a friend's pi - same model, memory, etc. When I switch the pi using the same cables, power supply, and memory card - the hdmi works on my friend's pi but not on mine. So there is clearly a hardware problem on my pi. I got out my magnifying glass a...
by yaconsult
Fri Mar 07, 2014 9:45 pm
Forum: Beginners
Topic: I can NOT get HDMI output working!
Replies: 7
Views: 1684

Re: I can NOT get HDMI output working!

I borrowed a friend's pi - same model, memory, etc. When I switch the pi using the same cables, power supply, and memory card - the hdmi works on my friend's pi but not on mine. So there is clearly a hardware problem on my pi. I got out my magnifying glass and started examining the components, espec...
by yaconsult
Mon Mar 03, 2014 7:14 am
Forum: Beginners
Topic: I can NOT get HDMI output working!
Replies: 7
Views: 1684

HDMI definitely no longer works

OK, I have verified that it is the hdmi output on the pi that has stopped working. I confirmed this by digging out the hdmi to dvi cable and hooking it up to the display I have successfully used before on the pi. I tried both a noobs install sdcard and my current up-to-date raspbian sdcard. There is...
by yaconsult
Fri Feb 28, 2014 8:18 pm
Forum: Beginners
Topic: I can NOT get HDMI output working!
Replies: 7
Views: 1684

Re: I can NOT get HDMI output working!

Thank you for the suggestions! I have tried booting from the noobs install image on my second sdcard and get the same results - no hdmi display even when trying the number keys 1 through 4 multiple times. The advantage of troubleshooting using the weezy sdcard instead of noobs, of course, is that I ...
by yaconsult
Fri Feb 28, 2014 5:53 am
Forum: Beginners
Topic: I can NOT get HDMI output working!
Replies: 7
Views: 1684

I can NOT get HDMI output working!

My pi is one of the early models with 256 MB of memory. It is running the latest Wheezy with all raspbian updates and the latest firmware as provided by rpi-update. I have tried changing all the video related settings in config.txt as well as deleting config.txt. Clearly, the display is being seen b...
by yaconsult
Fri Feb 21, 2014 8:04 am
Forum: Networking and servers
Topic: Serial Console Server
Replies: 5
Views: 6662

Re: Serial Console Server

Nice job on the project! I am planning to do something similar but also add a relay board to allow power cycling the equipment connected to the console server. There are some cheap boards full of relays available like this one: http://www.amazon.com/SunFounder-Channel-Shield-Arduino-Raspberry/dp/B00...
by yaconsult
Sun Feb 09, 2014 7:08 pm
Forum: Troubleshooting
Topic: no composite video output to tv
Replies: 2
Views: 606

Re: no composite video output to tv

OK, I had a chance to get back to this today. I started out by reformatting the sdcard and copying all the files from the lastest noobs distribution to it. And, it's working again! I guess I need to experiment and understand how noobs settings and configuration are set and saved. Noobs is a great ad...
by yaconsult
Wed Feb 05, 2014 1:29 am
Forum: Troubleshooting
Topic: no composite video output to tv
Replies: 2
Views: 606

no composite video output to tv

Fresh install of raspian from noobs. The pi is up and on the network and can be logged into remotely. But the tv plugged into the RCA video port is black and there is no caps lock light coming on when I push the caps lock on keyboard. There do seem to be some faint flashes on the tv as the pi boots....
by yaconsult
Thu Aug 08, 2013 5:40 am
Forum: General discussion
Topic: Paper-Duino-Pi
Replies: 33
Views: 13043

his campaign has been wildly successful!

With 8 days left, he has already surpassed his last stretch goal and raised more than ten times what he needed. With all the experience he's gained, he'd be the ideal person to do an arduino addon for the pi. And with his focus also being education, it's a match made in heaven. How great it would be...
by yaconsult
Thu Jul 25, 2013 6:23 pm
Forum: General discussion
Topic: Paper-Duino-Pi
Replies: 33
Views: 13043

Re: Paper-Duino-Pi

Thank you for the links - I'm local too, so those links are especially appreciated. I believe we spoke briefly at this month's jam. For knockoffs/compatibles - there are quite a few on dx.com and the reviews often indicate how compatible it is and any issues. Also note this project which has exceede...
by yaconsult
Wed Jul 24, 2013 4:03 pm
Forum: General discussion
Topic: Paper-Duino-Pi
Replies: 33
Views: 13043

Re: Paper-Duino-Pi

Please keep us posted. I'm interested in doing the same. I did some research and found that in the U.S. this kind of prototyping board is called either veroboard or stripboard and I was able to find it on amazon.com. Most places only sold the type of prototyping boards with isolated pads - which is ...
by yaconsult
Wed Jul 17, 2013 6:17 am
Forum: General discussion
Topic: help getting the right bridge
Replies: 1
Views: 400

arduino boards for raspberry pi

I am surprised you got no responses. I have exactly the same questions you had and am wondering if you have tried out any of the available options? They are expensive compared to the pi, so it is good to find out how well they work before spending the money.
by yaconsult
Wed Jul 17, 2013 5:58 am
Forum: Automation, sensing and robotics
Topic: Easy & Cheap DIY Arduino add-on for the Raspberry Pi
Replies: 6
Views: 3515

Re: Easy & Cheap DIY Arduino add-on for the Raspberry Pi

> now to redesign it so the pin holes correspond to a real arduino for shield use

I'm confused! I thought the whole idea of the alamode was that it let you plug in arduino shields when the alamode is mounted on the raspberry pi?
by yaconsult
Sun May 19, 2013 7:33 pm
Forum: For sale
Topic: UDOO: Android Linux Arduino in a tiny single-board computer
Replies: 0
Views: 2047

UDOO: Android Linux Arduino in a tiny single-board computer

Now that the Raspberry Pi has paved the way, here is a kickstarter project - UDOO. The following information is from http://www.kickstarter.com/projects/435742530/udoo-android-linux-arduino-in-a-tiny-single-board . And all of the connectors are along one edge of the board! :) What's UDOO? UDOO is a ...
by yaconsult
Mon Feb 11, 2013 1:27 am
Forum: Python
Topic: why does python-pip require an older version of python?
Replies: 5
Views: 30810

Re: why does python-pip require an older version of python?

Thanks! I used easy-install. I guess the disadvantage is that it won't be automatically upgraded with python. Shouldn't the repo version have been updated to 2.7 when python was?
by yaconsult
Sun Feb 10, 2013 9:12 am
Forum: Python
Topic: why does python-pip require an older version of python?
Replies: 5
Views: 30810

why does python-pip require an older version of python?

Shouldn't there be a python-pip for python 2.7? What is the best solution? root@raspberrypi:~# python -V Python 2.7.3 root@raspberrypi:~# apt-get install python-pip Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed...
by yaconsult
Fri Jan 25, 2013 7:03 am
Forum: General discussion
Topic: I made a Raspberry PI Laptop
Replies: 839
Views: 426615

two lapdock keys shorted together

I bought a new lapdock from ben's outlet for $50 a while ago. I finally got the adapters I needed and hooked it up. I'm having a strange keyboard problem, though. When I type the letter "r" or the letter "w", I get "rw" on the screen. Checking all the other keys echos the correct letters. So I'm gue...
by yaconsult
Tue Nov 20, 2012 4:19 am
Forum: HATs and other add-ons
Topic: According to email, existing orders for kits will be filled?
Replies: 0
Views: 791

According to email, existing orders for kits will be filled?

That is correct. If you leave the order as it is you will be sent an unassembled board. If you cancel it you will not be able to get a Gertboard at all because they are discontinued. We are only fulfilling orders that have already been placed and not taking new ones. Hope this helps. Regards Sylven...
by yaconsult
Thu Oct 25, 2012 9:04 pm
Forum: HATs and other add-ons
Topic: Gertboard for US customers: from Newark? or someplace else?
Replies: 1
Views: 985

I ordered from newark.com on 10/01

I ordered from newark.com on 10/01 and my current delivery date is November 29. They must have gotten a hell of a lot of orders because it no longer seems possible to order them from newark. I'm not sure what the holdup is because I don't think any of the parts are hard to get. People in the UK seem...
by yaconsult
Mon Jun 11, 2012 9:56 pm
Forum: General discussion
Topic: SD Card Benchmarks
Replies: 301
Views: 311386

Re: SD Card Benchmarks

root@raspberrypi:~# hdparm -t /dev/mmcblk0

/dev/mmcblk0:
Timing buffered disk reads: 14 MB in 3.23 seconds = 4.33 MB/sec
Robert_M wrote:Is there a version of these testing programs that will run directly from the Pi?
by yaconsult
Sun May 20, 2012 5:15 pm
Forum: Off topic discussion
Topic: tiny, cheap Linux PCs
Replies: 1
Views: 978

tiny, cheap Linux PCs

http://www.pcworld.com/businesscenter/article/255837/this_tiny_pc_runs_linux_and_android_40and_costs_just_74.html This Tiny PC Runs Linux and Android 4.0--and Costs Just $74 Over the past few months there have been no fewer than three tiny, cheap Linux PCs making headlines, and now there's a fourth...

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