Home » 2015 » February

Rasberry Pi Controlled Car

I still have some sensors from Adafruit I have to work on but I keep on thinking on my goal I mentioned in one of my posts.  I want to make a remote controlled (rc) car driving by Raspberry Pi and PI4J.  So finally I took my courage together and searched for that piece of hardware (car chassis) that will change my life.  I bought a car chassis (see picture) and controller to control the wheels on the car.  Bought 2 controllers just in case I would have the crazy idea to set up a 4 wheel  control on the car.  Not that I am putting pressure on myself. The componens come out of China, so it takes a while before they will be here in Belgium.  When looking for the components it surprised me that those pieces cost a lot less than in other parts of the world and even more crazy the fact that there are no shipping costs.  Found a site where the transport costs were higher than the hardware itself.  Amazing.  Disadvantage is the fact that it will take a while before they will arrive.  I have time but really looking forward to start developing, solding and putting everything together.

To be continued …

New 4WD Robot Smart Car Kits Chassis w/ Mobile Platform 4 Wheels Dual H Bridge DC Stepper Motor Drive Controller Board Module Arduino L298N HG

Jan

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blog secured with SSL

As of this moment.  my blog is also available via secured ssl connection : https;//blog.byle.be

Of course the blog is also still available via standard http connection but I know that people insist to have SSL from the moment they have to complete a form on the internet.  I am working for a financial company and a while ago, there was a guy who made an official complaint about the use of our corporate website.  The website has some forms that are used for sending questions, remarks, ….  His point was that since the website and thus the form was in http, somebody on the internet could intercept his submitted form and see what he had written…  We first had a good laugh about this but taking a step back, we realized that he had a point.   Although the forms shouldn’t contain sensitive information like card numbers or privacy information, it was a good idea to use SSL.  You can still decide not to use SSL but if you need, you have it.

 

Jan

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Developments TCS34725 finished

I created a new release 1.2 and pushed to Github.  I finished the development and troubleshooting for the use of TCS34725.  After posting my findings on the Adafruit Forum I understood that my readings in my application were correct.  A little python script proved this because the results there were the same.  As a conclusion I can say that I am kinda disappointed in the sensor.  The sensor is apparently very sensitive for surrounding light which impacts the readings.  I just thought that I could put an object of some color on the sensor and get rgb values who were close to the actual color of that object but it is not that easy.  Read the forum for more information.  I have finalized the development.  Feel free to comment.

As with the other sensor, I used PI4J, IntelliJ and Java 1.7 of course.  The application is running on Raspbery Pi B+.

 

Jan

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Sensor TCS34725

Currently working with the Sensor TCS34725 (Color light-to-digital converter with ir filter.  Promising when you look at the description of the sensor.  But already when doing early tests I did not get the right rgb readings.  I also used a simple Python program to get the RGB readings but also there the output is similar.  Like with the other development I did earlier in this blog, I also use PI4J.  Now I am checking my source code and verify with the datasheet for the sensor to find out if I am missing something but since the Python program has similar results I have some doubts I do something wrong.  In the meanwhile I also had contact with Adafruit support around this issue but my questions are still unanswered although I got reaction from them.  See thread on  https://forums.adafruit.com/viewtopic.php?f=8&t=67795  Feel free to make comments too if you have any ideas.  I am open for them.  I hope I can get the sensor give me the results I expect or have an explanation why I have not.  Shoot if you have an idea.

See TCS34725 for more information on the sensor.

Jan

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