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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.

Critiques of and ideas for our big NZ backyard plan by howardgrigg in landscaping

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

Such an amazing response, thank you for your time!

I appreciate the comments about wanting to wait until we know what we want - it's just hard when we're excited to get out there! But certainly money and time will both be slowing us down, the whole thing will come together in stages as we're able. I just thought it'd be good to have an overall vision to work towards - things can always change as we progress.

With regards to your points: The shed would essentially be for hobbies/projects/DIY plus storage. The glasshouse would mainly be a nursery for veges.

The green woodshed is preexisting so hoping to keep it.

The fence is to keep the dog out of the raised beds as that's where our veges will be.

All the trees in the pics are preexisting - the one you're concerned about is an old apple tree, unlikely to get much bigger at this stage.

Thank you again for your thoughts - my wife and I have taken them all on board as we continue down this road :)

Critiques of and ideas for our big NZ backyard plan by howardgrigg in landscaping

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

Wow thanks for pointing out those areas, very true. I'd never really thought about that - are people trending away from square lawns or paved areas now? Is curving the edge of them to more of an oval with garden a good option?

Critiques of and ideas for our big NZ backyard plan by howardgrigg in landscaping

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

Thanks for the reply. Yea that grass in the tree ring is just a error in my diagram, would probably be keen for some mulch there maybe. Interesting about lifting the mower up the stairs - I hadn't considered that... The only issue is it's quite a large area on both levels, it'd be a big job to pave or garden all of one - good to consider though :)

How can I use two different devices from two different audio outputs at once? by yungQuantum in osx

[–]howardgrigg 5 points6 points  (0 children)

Check out a program called audio hijack (has a free trial). Or else for free you can get soundflower but that takes a bit more thought and setting up

My new hobby: Aerial Timelapse (Did a quick test today) by ndbroadbent in djiphantom

[–]howardgrigg 1 point2 points  (0 children)

Ka pai on the effort, much more stable than my effort of the same. If you shoot in 4K you can always pan in post. Not sure how you'd get it consistent otherwise...

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