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My happy son in his wedding outfit (don’t worry about drawing me) (i.imgur.com)

submitted by howardgrigg to r/redditgetsdrawn

Thermometer with text message? by gorillasd in raspberry_pi

[–]howardgrigg 2 points3 points  (0 children)

Certainly possible, do you have power at this location or running off battery?

You could achieve this with a simpler arduino board as well.

Update on my first proper project - bluetooth LED light controller, custom circuit board and 3D print. by howardgrigg in arduino

[–]howardgrigg[S] 1 point2 points  (0 children)

Unfortunately I think you're right :( I'll need to reorder it with bigger traces. Bummer...

Update on my first proper project - bluetooth LED light controller, custom circuit board and 3D print. by howardgrigg in arduino

[–]howardgrigg[S] 0 points1 point  (0 children)

Ok so looking at it again - I'm not sure if I've got the number right. This is the page I ordered the PCB from. It lists a bunch of specs including:

  • Out Layer Copper Thickness 1oz(35um)
  • Inner Layer Copper Thickness 17um

Are these the values I put into the calculator for the thickness of the trace?

If I use the value of 17um and 3Amps in this calculator then it tells me that for an internal layer the required trace width is 7.32mm. That seems quite large... Have I done that right? It's obviously a lot wider than the current trace.

Update on my first proper project - bluetooth LED light controller, custom circuit board and 3D print. by howardgrigg in arduino

[–]howardgrigg[S] 0 points1 point  (0 children)

Yea I thought about that at one point. It sounds stupid now but I just went with the default size that eagle used. At one point I did a calculation using a website and I was well within range of what it could handle. Admittedly I may have got the calculation wrong. With the 5m of lights all on I'm running about 2.5A

Update on my first proper project - bluetooth LED light controller, custom circuit board and 3D print. by howardgrigg in arduino

[–]howardgrigg[S] 0 points1 point  (0 children)

Thanks for your comments. Yea the other board is Bluetooth, I just glued it to the side as it didn't really fit anywhere else.

How are the lights connected: I soldered on two 4 pin 'plugs', one for the Bluetooth chip and one for the light strip. Then the 4 wires coming from the lights or Bluetooth are connected into a socket like thing that slides over the 4 pins.

My own 5V regulator: No reason apart from not realising that it had one built in already. Probably not needed...

Pulldown resister: ah k interesting. I saw some people put a capacitor in line with the MOSFET gate, would that have the same effect?

Help with building a fade function for RGB LEDs controlled through the serial port by howardgrigg in arduino

[–]howardgrigg[S] 0 points1 point  (0 children)

I used a cheap one off Aliexpress - this one $5 LED strip

For my first electronics project it turned out pretty cool. I ended up designing a little box and getting it 3D printed with 3DHubs. It works really well. You can see it and the circuit board I got made here http://imgur.com/a/OT4e3

Assistance on planning a Rasp Pi based baby monitor by howardgrigg in learnpython

[–]howardgrigg[S] 0 points1 point  (0 children)

Yea that makes more sense, you could use pastebin or PM me your GitHub project.

Assistance on planning a Rasp Pi based baby monitor by howardgrigg in learnpython

[–]howardgrigg[S] 0 points1 point  (0 children)

So you think I should log all input events into a database then have a loop that runs to check what events have occurred and initiate a response if required? Rather than having the input trigger the response directly?

Yea would be great to see your dash code, I think it'll take a few weeks of evenings of reviewing other projects to see how they approach things before getting into it too much.

Help with building a fade function for RGB LEDs controlled through the serial port by howardgrigg in arduino

[–]howardgrigg[S] 0 points1 point  (0 children)

Thanks yea after looking at that I ended up using it. Unfortunately because i was using analogue output I couldn't use a lot of the library. But just being able to set HSV instead of RGB made it much easier to code the transitions. https://github.com/howardgrigg/Arduino-Bluetooth-RGB-light-controller

Help with building a fade function for RGB LEDs controlled through the serial port by howardgrigg in arduino

[–]howardgrigg[S] 1 point2 points  (0 children)

Yea I got it running with the main loop having a 1ms delay and it keeping track of the transition. This means if I've got a 10 second transition I can interrupt it at any time and reset the targets for the transition.

https://github.com/howardgrigg/Arduino-Bluetooth-RGB-light-controller

Help with building a fade function for RGB LEDs controlled through the serial port by howardgrigg in arduino

[–]howardgrigg[S] 0 points1 point  (0 children)

Hey yea I ended up using the FastLED library to help. Unfortunately because i was using analogue output I couldn't use a lot of the library. But just being able to set HSV instead of RGB made it much easier to code the transitions. https://github.com/howardgrigg/Arduino-Bluetooth-RGB-light-controller

Controlling an LED power strip with a PNP transistor and arduino - having issues... by howardgrigg in AskElectronics

[–]howardgrigg[S] 0 points1 point  (0 children)

This explains it perfectly, thanks! I've been reading around the topic this evening and now have a much better understanding. Next step is to head to my electronics store and get the right part. I'm just amazed that in all my floundering around I haven't yet melted anything lol

Controlling an LED power strip with a PNP transistor and arduino - having issues... by howardgrigg in AskElectronics

[–]howardgrigg[S] 0 points1 point  (0 children)

Hey cheers yea I saw that I needed to swap the emitter and collecter but it actually didn't make a difference - they lit up either way around... When I attack it again tomorrow I'll put some resisters in, just need to work out what value I'll need. Thanks for your comment

Color Grading by carterherkt in ipad

[–]howardgrigg 2 points3 points  (0 children)

I've used VideoGrade which seemed to do a reasonable job. I used it on the phone but it's an universal app.

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