Big amperage here - 10amps at 5 volts (USB connector required)
http://www.iccfl.com/product_info.php?cPath=200&products_id=10252&osCsid=bqqf1uamod1neomhogbue0jm92

Or, ready-to-use
http://www.iccfl.com/product_info.php?cPath=200&products_id=18377

 

A better alternative is a cigar lighter socket USB charger - where I am, the £1 store sometimes has them, I've never paid more than £4.99p for one.

I got some of those, rated from 180-500mA.

 

I got some of those, rated from 180-500mA.

IIRC; the expensive one was rated 2.1A.

500mA is the "in spec" current for USB - I've never seen one less than 1A.

 

I think there are a lot of dc-dc converters on eBay. Easily handle 2-3 amp. Even come in with a USB port. And they will be less expensive than making your own.

But if you really want to make your own, then go for it!!

 

Jens, did you switched to SMD diodes

By the way the latest PCB layout is the way I place the decoupling caps.
Nice Job.

 

I think there are a lot of dc-dc converters on eBay. Easily handle 2-3 amp. Even come in with a USB port. And they will be less expensive than making your own.

But if you really want to make your own, then go for it!!

I know, but I need it on Tuesday.

Jens, did you switched to SMD diodes

By the way the latest PCB layout is the way I place the decoupling caps.
Nice Job.

Yes, I found 98pcs in a drawer, so I firgured I could use them.

Thanks!

 

Here's the final product. Working perfect. (or at least close to it, I hope)



When I was ironing the graphics, the paper came a little bit off center of the PCB, that's why there's a border around half of the PCB.

Now I need to make an enclosure for it.

 

Looks nice. Thanks for the pics. I'm not quite understanding the backside. It looks as if the solder blobs run over onto the copper plane. Since it's working, that must not be true. The clearances must be pretty small?

 

Looks nice. Thanks for the pics. I'm not quite understanding the backside. It looks as if the solder blobs run over onto the copper plane. Since it's working, that must not be true. The clearances must be pretty small?

Thanks. While soldering I came to think of when was the last time I soldered components on a PCB. I couldn't remember. My solderingskills seems to fade away. I hope the skills will return.

Clearance is set to 0.4mm and the trace width is the same. One time I thought of getting the traces fatter, but that slipped somewhere in the process.

 

Wow, I'd need more clearance than that, I think. You must have good eyes and a steady hand.

 

nice pcb!!

 

nice pcb!!

Thanks!

...and here is the final product. In an super-ugly-15min-FreeCAD-design. 3d printed.

 

Hello,

Having a closed box as you show will give problems with the heat produced.
The heatsink can not get rid of the heat and will get warmer and warmer.

Bertus

 

Yes, I thought of that, but it was too late. I'm going to drill some holes.