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Dedicated RLP processor


#1

Today I received 2 test PCB’s for my “dedicated RLP processor” :slight_smile:

I need to do some real-time stuff that I can attach to a FEZ Panda or Cobra. For that reason I developed a board that takes an AT32UC3B0256 microcontroller, holds a voltage regulator and crystal. Plus it makes those 0.5mm pitched pins more accessible.

It is also my first TQFP I have soldered and it was easier then expected!


#2

Looks nice!


#3

That looks like the FEZ Ant everyone was talking about :slight_smile:


#4

Wouter, where did you have the pcb made? Care to share a price indication for the pcb?


#5

I ordered 2 pieces on eurocircuits.com and I got 3 pieces for 60 eur. Btw they have a price calculator on their site.


#6

for small runs, dorkbot pdx has a good deal - $5 per square inch of space your board consumes, and you get 3 copies. Never personally used them but I hear lots of good stories. Intl shipping can play havok of course, but worth considering


#7

I ordered myself a new soldering station (done with the firestarter ;D) and I’m going to be ordering my board from DorkbotPDX here and doing some SMD of my own :slight_smile:


#8

+1 for DorkbotPDX


#9

I had a temperature controlled station but I’ve sold it. I do the SMD soldering with an ordinairy 35watt weller soldering iron with 1mm tip. Works like a charm!
I also used a flux pen.

For cases I need to desolder components, I use a heating gun with a home bended piece of aluminium. So you really don’t need special SMD tools.


#10

The best iron I’ve ever owned is my $10 RS special. I’m now upgrading to the $30 Chinese Hakko knock-off :slight_smile:


#11

What are the long rectangular pads up above the MCU?


#12

The CPU has it’s own voltage regulator that converts the 3.3V to a Vcore of ~1.75V. Atmel recommends to place two 0.1µF caps in parallel on input and output of the regulator.

I admit, the pads are a little too big for 0.1µF caps :slight_smile:


#13

Hardware guys at my company sometimes order prototypes from a polish manufacturer. Could you please compare is there any difference in price between what you paid and what this calculator tells you:

http://zwod.technoservice.com.pl/en/offered-technologies/order-prototype-special-offer-fr4-tska/

I’m curious if we should consider global companies or stick to local ones :wink:


#14

I tried it and it seems like there is a huge price difference…

I was forces to choose ‘panel’ type, and I see they took the board dimensions as the panel size. Maybe I should have multiplied the width by 2. It was not very clear.

Also, the order quantity, do they mean number of panels? Not very clear :slight_smile:


#15

Can you post a close-up picture of a board that was made by that company?


#16

Sure, I will ask the guyes for one and post a photo here. If its acceptable i will be more than happy to help you with the logistics in case you want to order anything.


#17

Sory for the quality as this was taken with my cell phone


#18

Another device


#19

The first one is a device that was made by a company called SIMS (http://sims.pl) that outsources PCB making to the technoservice (company i mentioned earlier). The other one is a prototype made directly for us by technoservice. Do you want to see a high resolution photo?


#20

Thank you for those picture. The PCBs look very professional, so I might consider technoservice in future.

Many thanks for the tip!