Thursday, 17 January 2019
Wiring seemed pretty straight forward, just solder the appropriate rated cable to these welding points as shown in the above image, apply voltage and lets see what happens.
Well actually no, I had a some concerns:-
- that's 240V mains voltage on exposed terminals
- 20W on something so thin ? I need find some way to dissipate heat.
Solve the Problem No2 First: Heat Dissipation.
Result: After removing the mains, did the "carefully feel the heatsink" method, happy to say the heatsink felt only slightly warm. At this point I should mention Do Not Look Directly at the COB when it is powered on.
Solving Problem No1: Exposed 240V Terminals.
I'm really pleased how this small project worked out, especially re-purposing old light fittings I would normally have thrown away. I am in the process of buying more of these 20W COBs even though I cannot think of where they are to be used. As always the trick to doing this type of project comes down to appropriate case/fitting that adequately mounts for both COB and heatsink, with safe termination while still looking good.
Note, the heatsink was significantly warmer after a time when mounted inside the light fitting.
Sunday, 11 November 2018
It was perfect conditions to do a longish ride, cloudy not too hot, minimal wind and great company. We did have a few mechanical damages that needs urgent attention before using those cycles. A worn tire and a broken pedal.
Check out the Endomondo Challenges Page.
Tuesday, 30 October 2018
It's official, entry completed and paid for, can't wait to hit the tarmac :-)
The 160kms looks really good but I really haven't done any serious training for this distance, maybe next year I will attempt the 160km.
Sunday, 2 September 2018
Really simple project.
Arduino Pro mini, with an 8 LED WS2812 stick, a touch switch, finished with 1x 18650 battery all mounted inside a 2x 18650 powerbank charging case. Sketch includes the FastLED library.
Tested duration in flash mode: 14hours
Time taken to complete project: just under 1hour
Time taken to edit video: 8+ hours LoL (not good at this really)
Camera: Sony HDR-CX405
PC: Optiplex 9010 i5 8GB Ram running Linux Mint 19
This came out much better than I had expected, especially using the powerbanks case to contain all the components. It is also possible to replace the Arduino Pro Mini with the sketch uploaded onto a ATtiny85 and yes I've tried it and it works just fine.
Ideally it would've been nice to use another touch switch as the Power ON/OFF switch but I have no idea (yet) how to power up any Arduino board using an electronic switch such as these ones.
Bridging both solder points A & B means, as soon as power is applied, the switch in ON, next time you touch the case, it goes off ie it toggles.
This is where you get your 5V and GND power source from.
And yes, don't forget this is still a Powerbank. I would definitelty use this when I create Timelapses on my Sony FDR-X3000 action camera.
The possibility of using this concept has opened many idea opportunities and in my mind I have already formed 4 new projects:-
- Garage minder: detect movement in garage inform household via radio signal
- Emergency House lighting with Solar Panel backup
- Fishing Underwater night LED lighting rig
- WS2812 Christmas tree lighting https://youtu.be/if178oluID4
It has been a while since I've deleted all my old projects, I'll attempt to recreate them again and repost.
Thursday, 30 August 2018
video by Andrew Tuline
We all do it, try something new, have a little play with things then stand back to admire our most recent achievement. Then curiosity leads us to down the youtube path, to see how other people are doing in this field.
Arduino is no exception. I was so proud of myself after purchasing some small WS2812 Driver boards and with a little bit of coding I finally created my rear night flashing cycle lights! (project will be uploaded very soon)
To be honest here, this is pretty extreme for such a simple project, normal LEDs would have worked just as well, if not better. But !!!
I wanted to be different!!
Very proud of my self with my projects results, where part of the code required the FastLED library. So I decided to look up the creator and he gave some really good advice and there are some really great demo codes you can try.
Also visit his youtube channel:-
I feel I have found one of the pioneers in this field, and his demo codes are freely available, well commented with hints on how to change to suit ones purposes.
I want to make christmas tree lights just like in that video, but baby steps first!!
Sunday, 26 August 2018
Simple setup; an Arduino Uno R3, breadboard, component tester, power source all combined onto a single plastic case that makes this an extremely versatile project.
This is the 2nd one I've made, by adding the component tester it made sense. I have so many loose components lying around I got too lazy to search up there values, it was far easier to just grab new parts out of the labeled drawers, very wasteful.
What I get out of this:-
- a "portable" arduino prototyping board
- a component tester
- an USB powerbank (charge your mobile phone)
Stored inside the case:
- arduino USB cable
- an ATtiny85 shield
- an TTL UART convertor
- microUSB cable
- arduino pro mini
- pocket multimeter
Thursday, 23 August 2018
Sunday, 5 August 2018
This is similar to how I select a transistor along with calculating the value of the Base Resistor required to place the transistor in saturation mode; ie a transistor in switching On/OFF mode. There is no point is creating my own video when this explains quite clearly the process.
A project is currently under way where I use this process, soon to be posted. Just a small heads up, the following small switching Transistor is my all time favorite, the S8050 NPN transistor :-)
Datasheet: S8050 Wing Shing Computer Components.
|click here to go to ebay listing|
Wednesday, 1 August 2018
Keepass2 which works just as good.
Tuesday, 24 July 2018
Monday, 23 July 2018
Failed goal, oh wow. Well it's Monday so lets get this Challenge up and running once more! Good thing to know when logging in this morning I have gained a few more badges :-)
Nice to see the Champion badge 1,000km recorded on this site :-)
New goal added, let's see if I can achieve this one!
Another enjoyable ride, I'm well used to going down this route. There are some places where the road doesn't allow a car and a cyc...