Getting screws to hold in end grain

Forums › Home Workshop DIY › Getting screws to hold in end grain

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Coil

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#1718114 10-Feb-2017 09:59

jimbob79:

I hope I can answer your questions. I got some LED Strip Diffusers from BangGood (see image below) which I hope will will solve the issue of light strike/glare also I wireless remote which has 'Dimmer Control' function which should also help.

I was going to have the power switching supply stealth at the top of the shelving unit but I had a change of mind and now going to have it on the floor since it's 'double insulated' seal unit (CE standard). The DC 12V wiring will be routed through a channel on the back side connecting each strip in a parallel/daisy chain configuration.

Also here here is a quick peek at how it will look like.

Yep that looks good. Is the driver a 240V supply or 12V supply? If its a 12v go and get a halogen lamp transformer, A wire wound one.
Any sparkie should be more than happy to give you one for free. We pulled 100's of them out of houses straight into skips.
Definitely want the V style diffuser to put in the wedge, Dimmable LED strips are not cheap but worth it.
You shouldn't encounter issues with heat on top of the unit. Possibly below but it is all low power stuff.

jimbob79

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#1718178 10-Feb-2017 10:43

TimA:

Yep that looks good. Is the driver a 240V supply or 12V supply? If its a 12v go and get a halogen lamp transformer, A wire wound one.
Any sparkie should be more than happy to give you one for free. We pulled 100's of them out of houses straight into skips.
Definitely want the V style diffuser to put in the wedge, Dimmable LED strips are not cheap but worth it.
You shouldn't encounter issues with heat on top of the unit. Possibly below but it is all low power stuff.

Is normal 240V to 12v 72W AC-DC switch mode power supply. I was curious as to why use a 'halogen lamp transformer'? I did not know that you could use those kind of power supplies for LED Strips.

Also I think all 12V LED strips are capable of dimming as-long as it's being regulated at the 12V side and not the 240V mains. I know that dimmable 240V LED bulbs/lamps do cost more.

I'll post more photos once it's all completed.

richms

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#1718250 10-Feb-2017 12:22

Those cheap inline dimmers are just PWM at quite a low frequency so are very unpleasant to look at when dimmed right down.

I have pulled all mine out and am in the process of putting in some white/coolwhite/amber pixel strip, each LED has its own PWM at a much higher frequency, so the whole thing isnt flashing as one, and also now will be able to change each LED on its own if I want to. The amber in them is to give even more gross "incandesent like" dimming capabilities but I wont be using those.

Richard rich.ms

jimbob79

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#1718256 10-Feb-2017 12:27

richms:

Those cheap inline dimmers are just PWM at quite a low frequency so are very unpleasant to look at when dimmed right down.

I have pulled all mine out and am in the process of putting in some white/coolwhite/amber pixel strip, each LED has its own PWM at a much higher frequency, so the whole thing isnt flashing as one, and also now will be able to change each LED on its own if I want to. The amber in them is to give even more gross "incandesent like" dimming capabilities but I wont be using those.

Those addressable LED strips do cost a bit more. You need to get the RGBW versions. I was thinking about getting some short 500mm for playing around with my Arduino.

richms

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#1718282 10-Feb-2017 12:31

The cool white/warm white ones let you go over the whole range between the 2. I actually had coolwhite/warmwhite 12v dumb strip in the wall and had one of the limitless boxes driving it, and then tried an inline dimmer in case it had a higher frequency.

It seems from what I have read that they choose the stupidly low frequency to get more acceptable emmission limits from the strip, going high and they start to take out AM radio and other things.

Richard rich.ms

Coil

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#1718285 10-Feb-2017 12:42

jimbob79:

TimA:

Yep that looks good. Is the driver a 240V supply or 12V supply? If its a 12v go and get a halogen lamp transformer, A wire wound one.
Any sparkie should be more than happy to give you one for free. We pulled 100's of them out of houses straight into skips.
Definitely want the V style diffuser to put in the wedge, Dimmable LED strips are not cheap but worth it.
You shouldn't encounter issues with heat on top of the unit. Possibly below but it is all low power stuff.

Is normal 240V to 12v 72W AC-DC switch mode power supply. I was curious as to why use a 'halogen lamp transformer'? I did not know that you could use those kind of power supplies for LED Strips.

Also I think all 12V LED strips are capable of dimming as-long as it's being regulated at the 12V side and not the 240V mains. I know that dimmable 240V LED bulbs/lamps do cost more.

I'll post more photos once it's all completed.

Id check the strip to see the exact wattage and amperage required. You cant just give it 12V and call it a day.
Id go to Decor Bellina in Auckland and take your LED strips in and ask Alpa what he would suggest to drive it. Hes a great guy and more than happy to help for DIY home stuff. If you need 12V to drive the driver you can use the halogen wire wound transformers. They work well.

You cant just dim a LED, It has to be a dimmable LED strip. Usually you just get a flickering or it doesnt work.
If you get good quality LED gear you will be $400 deep in no time :) The dimming is handled by the driver itself, Same with RGB+W

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Athlonite

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#1718402 10-Feb-2017 18:32

jimbob79:

ubergeeknz:

Why not use a barrel nut / cross dowel nut like on flat-pack furniture?

Originally I was going to use threaded inserts for my shelving project and I thought it was a bit over kill. That's when I saw this handy trick of using a dowel/plug and hence the reason on starting this thread. Using a barrel nut seams an over kill.

If it's just some shelve and not a really high stress area then Pine will do fine I have a friend who's a cabinet maker by trade and asked him and that's his answer hardwood dowel for things like chairs and tables which have high stress and weights put on them and pine for anything else