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Dubbie Dubbie's Blog

45 posts
Having recently been happily awarded a $100 (or £81) prize for CatDogFox in Remote Monitoring and Control I splashed the cash on a Knippex wire stripper (after being encouraged by shabaz 's article on wire stripper. I might not use it that much but it is really nice, plus I can strip larger diameter wires as well, which could well be useful. I also purchased a coupe of the Easyradio eRIC wireless transceivers. I have wanted to get some radio transceivers for some time as I have used the Eas ...
I have always wanted to obtain one or more of the small Boxer mobile robots that were first manufactured a few years ago, but they were too expensive for me. Recently I saw that the price of new ones had dropped significantly from £70 to £30. I then looked online and found that some second-hand or returned Boxers (with damaged packaging but not damaged robots) were available for £22 so I quickly snapped up two. My intention is to dismantle them to see if I can put my own controlle ...
dubbie

What are Connections?

Posted by dubbie Aug 23, 2019
I feel a bit dim asking this, but what are Connections in Element14? and what do they do? I tried searching for an answer but all that comes up is about electrical connectors, so not much use.   Dubbie ...
Having been overjoyed to have actually finished the recent Picasso Design Challenge and being even more joyed over to be awarded a Finisher Prize, with greater joy at finding out the prize was a PiCadeRetro Arcade Dream Machine, image the amount of joy when the box arrived yesterday containing my prize. As usual, I waited a day before opening the box, as I like the fun and pleasure to build. I am very pleased to now have my Picade unboxed, along with an unexpected Pi 3B+ to make it all work and ...
I no longer seem to be able to upload AVI videos to Blogs I am creating. Is anyone else having this problem? It starts but then after achieving somewhere between 3% and 9% uploaded, it just stops and doesn't proceed any further. I have tried turning my laptop off and on, as well as waiting for a day to pass, before trying again, but it is still doing it.   Anybody know why?   Dubbie ...
For my DC Motors Mobile Robot I am using an Arduino Nano (with no connectors soldered in) and a dual DC motor driver (DRV8833) which now fit nicely inside the 3D printed chassis. I now need to make all the connections between these two PCBs and the four micro DC motors. In the past I have soldered wires directly but this caused me endless problems when trouble shooting so I decided to solder DuPont connecting wires instead. I cut off one connector, soldered one wire to one PCB and the other wire ...
For my DCMotor Mobile Robot I have now 3D printed a small holder for the Nano and dual H bridge drive PCBs. I wanted to make this mobile robot as tidy and neat as I could so this is a good way of fixing in these two PCBs while at the same time making everything look neat. All it consists of is a flat plate that fits between the DC motor boxes in the bottom motor compartment of the mobile robot, which has the same spacing for the four holes so that it can be held securely with the existing screws ...
I took the Nano controller that I used with the small train from my SuperRobot and just reconnected it to the battery and DC motors on my DCMotorMobot. This is all connected outside the 3D printed shell so is just dragged or pushed along but I wanted to make sure that the motor driver H bridge PCB that I was using would work with these motors, as it didn't work very well with my SuperRobot. As you can see from the video below, it all worked fine.     I have purchased some Arduino N ...
Just came back to my house to find an envelope containing some stuff from Tariq and Element 14. Not entirely sure why they sent me some stuff as I am not a recent winner of Project14. Maybe it was for being a runner up or a presenter or just being nice. Whatever it was for it is gratefully received. Some stickers, a presenter14 T-shirt (which looks sufficiently large), a MKR Zero and a MKR connector PCB, all very good. I had seen the MKR Zero previously and was interested in it so I am very plea ...
I printed out the remaining part for my half dome head for the DC  Motor Mobile Robot and I decided that I did not really like it. It didn't fit together particularly well and it just didn't look very good. So, I decided to return to my original idea of a complete dome head. This was quite simple to do although it took 2 1/2 hours to print the dome. The new base plate took another hour. However, these two parts now fit nicely together with a good interference fit and I think it looks much b ...
The next step in my DC motor mobile robot was the 3D printing of the top dome part. The purpose of this part is to contain some sensors so that the mobile robot can obtain information about the environment in front of the chassis. By making this a rotating dome it enables the use of single dimension sensors such as ultrasonic, infrared or even laser rangefinder sensors, as well as having the potential to include one or more cameras, as well as appropriate displays to provide information to the u ...
The next step in my DC Motor Mobile Robot is to add the battery container. This is a 3D printer box that a slightly smaller 4 x AA battery holder fits into. I decided to use a smaller battery holder as the original one did not leave any room for putting some sides onto it. The downside of the smaller battery holder is that it doesn't have an ON/OFF switch but that should not really matter, once I have the controller added.   The battery holder fitted perfectly so what was needed next was a ...
Having purchased some of the Micro Metal GearMotors I decided to make a small mobile robot to try them out. As the motors are so neat I decided that I would try to make a mobile robot that was also 'neat' and try and make it look as nice as possible. Most of my builds are cobbled together and look rather haphazard so I thought I might try and make a nicer looking one with everything perfect, or as perfect as I can manage.   Below is the chassis that I have designed and 3D printed. I have c ...
In the recent Month of Robots competition I made something I called SuperRobot, but disapprovingly it wasn't so super as the DC motors and drivers I selected just didn't seem up to the task of moving the quite heavy chassis. I decided that I needed to get some better DC motors and gain a better understanding of the DC motor driver PCBs that are available for them. Enrico Miglino recently illustrated some neat and small DC motors with metal gears and I thought they looked so good that I would get ...
dubbie

My Spanners

Posted by dubbie May 9, 2019
Recently there have been some blogs about the different tools that various Element14 members own and use so I decided to display my set of spanners and sockets that I have gathered over my lifetime. The ones I like the most are the ones I purchased most recently, which are slim, small and shiny. I bought a set for my son and decided they were so nice I had to have a set for myself. Then there is my earlier set of very small spanners, the smallest set that I could find, which I purchased when I r ...