Power supply for a scanset.

Hi guys,

I was just drawing an idea for a small high power satellite projector and found a problem. When your buying a scanset they come mostly with power supply. But when you also have to have a power supply for your lasermodules and fan's and etc it takes a lot of space. And now the day, the different parts you need will get smaller and smaller. What I like to know do you really need the power supply for the scanners or can you use one power supply that feeds all? Like for an example the DragonTiger scanners.

Or are there other brands where you don't need an extra power supply? I couldn't find one on my search. Well not really serious solutions.

Thanks already for your comments/suggestions!

[Remote the power supply. Put it another box. Add capacitors in the remote head, to supply the surges. 2 x 3500 to 7,000 uF Electrolytics will work just fine. Really good PSUS allow you to have sense leads, these make up for the ohmic drop in the wires. But you do need large, stranded, wires.

Steve

I just use the simplest linear psu available. A 2x18vac transformer, a bridge rectifier, two 10.000uf capacittors and a couple of 100nf ones thrown in there for good measure.

This does not take up so much space

@ mixedgas: that's an solution I didn't think off.

@ LaNeK779: Do you use then 1 powersupply for your whole projector or do you still have a second 1 to power the other components?

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Originally Posted by Rizard

@ LaNeK779: Do you use then 1 powersupply for your whole projector or do you still have a second 1 to power the other components?

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guilty! i use other power supplies too...

Ghehe. Well it would be nice if you can use one compact power supply for everything in the projector. Saves a lot of room. Everything is getting smaller but most of the guys here have still 2 or 3 power supplies in their projector. So I was thinking can we do it with one?

Well, how small does this have to be? A custom all in one solution would cost a small fortune.
Some people are using one big power supply and then isolated dc-dc converters to supply all needed voltages. This also seems like a very good solution but i can't point you to a specific thread right now (shame on me, I wasn't paying attention :( )

At the pic below, the dimensions are 24.5cm by 32cm and the max height is 10cm. Not too bad i guess...
There are two meanwell 24v/3.2amps, one astec 5v/8amps, one condor 12v/6amps, the cni driver and an iShow card with all cabling and back panel. With a bit of time thinking things out, dimensions can be kept quite compact

I chose all the power supplies using mouser.com search feature that allows search by dimension

http://www.photonlexicon.com/forums/...2&d=1329901226

Well that's nice packed together! ;) I'm trying to make a projector with the dimensions 15x15x15 or even less high. Its a big challenge butt making a drawing won't cost me a thing. And if I succeed I will maybe make one or 2 ;)

I am planning to use a 160VA 0-18-0-18 ring transformer similar to what mixed gas mentioned. For 5v, I've got the 5V 8A smps from a defunct B&W tek 473nm. If I need 12v for fans, I'll use one of those isolated DC-DC buck converters to step down the 48V to 12V. Wont need much current there so it wont place a whole lot of load on the transformer.

you could use this one:

http://connexelectronic.com/product_...roducts_id/123

100x75mm x 40 and not a bad price ;)


Ps: dichro has arrived.

Doesnt that mob (with the switcher) take forever to ship? Not that it matters - I could order it - I'm far from finishing my projector - as I still need 2 lasers, a quick show and some bounce mirrors / adjustable mounts.

The only saving with that psu is weight. The ring transformer is the same dimensions, give or take 10mm. I'll go with it because it is local, weight is of no concern, and I can document it here for others to copy so there are further options for projector builders to use :)

4 weeks shipment is fine. A metalshop takes usually 4 till 5 weeks and an optic supplier takes up til 8 weeks or sometimes even more. If you order just order 4 for other projects as well. ;)

2.5 weeks max for an off the shelf component like a power supply. 4-8 weeks is understandable for a built to order component, but 4-8 weeks for an off the shelf part is over excessive.