So yes, I love making/putting AVR's on DIP adapters... The top is MEGA64A I plan to use for I/O with a Z80 and the bottom is TINY1614 so I can get down to playing with uPDI.
So yes, I love making/putting AVR's on DIP adapters... The top is MEGA64A I plan to use for I/O with a Z80 and the bottom is TINY1614 so I can get down to playing with uPDI.
No decoupling caps?
No Ground plane?
Are those vias tented? How do you get pins into them?
How do you get pins into them?
Proto Advantage - SOIC-14 to DIP-14 SMT Adapter (1.27 mm pitch, 150/200 mil body)
http://www.proto-advantage.com/store/product_info.php?products_id=2200003
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Bottom side of PCB has pads for two single row surface mount vertical headers.
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They are DIP adapters from proto-advantage. It probably would be a good idea to put some caps on them, but they keep them generic not knowing what IC you plan to use. I put them on the breadboard after I plug these in.
They have machined round pins on the bottom of them - you can't see it in the picture though...
EDIT - I think you can get some of proto-advantages products from Digikey, but they come with the square pin header. I prefer the machined round pins to be kinder to my breadboards, so I end up ordering from them directly. Their shipping is cheap at $4 though.
It probably would be a good idea to put some caps on them, but they keep them generic not knowing what IC you plan to use.
BusBoard Prototype Systems
AB-SOIC32+SSOP
Adapter Board for SOIC and SSOP ICs, Up to 32 Pins
http://busboard.com/AB-SOIC32-SSOP
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or, could put all on a BusBoard thin (31mil, 0.8mm) SMT protoboard and scissor cut to fit.
BusBoard Prototype Systems
Surface Mount Prototyping PCBs
http://busboard.com/surfacemountpcbs
(search for thin)
Schmartboard's take :
Schmartboard
Schmartboard|ez 1.27mm Pitch SOIC to DIP adapter (204-0004-01)
http://schmartboard.com/schmartboard-ez-1-27mm-pitch-soic-to-dip-adapter-204-0004-01/
Alan, PCBs look great.
How did you solder the Mega 64 Chip?
Why are the Chip's pads black in color?
JC
Thanks DocJC - soldered by hand using thin solder, flux pen, and stereo microscope.
On the black, do you mean the tiny? I think it is the lighting - they are silver.
For the AVR adapters, do you place bypass caps close under chip, and pads for crystal and load caps? Oops, I read mention of not. On some generic adapters, I have installed 0304 smt caps close to chip by scraping solder mask, and placing cap.
I just put 100nF through hole caps on the breadboard. When I do a crystal for it, it often works even without caps (capacitance from the breadboard?) but most of the time I put crystal caps too. Always seems to work.
Now...I was having some very odd issues with my ATMEGA64A until I figured out they shipped it with the mega103 compatibility fuse turned on...
On my computer the color of the pads looks black, hence the question.
I wanted to know if you were doing something interesting to your boards I wasn't familiar with!
Your soldering, by the way, looks waaaaay better than mine.
Good luck with your project!
JC
Hi DocJC!! It does - I noticed that after you pointed it out. I'd love to say I was using some high tech laser CNC that heats solde paste, but it is good ole solder wire with a water soluble flux pen. It would look much worse if I didn't have a stereo microscope mounted to my soldering desk. I love using water soluble flux because I can water rinse it / blast it with compressed air and it always looks clean.
it is good ole solder wire with a water soluble flux pen. It would look much worse if I didn't have a stereo microscope mounted to my soldering desk. I love using water soluble flux because I can water rinse it / blast it with compressed air and it always looks clean.
That's how I learned to do it as well, so much better then solder paste/hot plates, at least for any thing but bga's which I leave for others to do.
Jim
And two more!!!!
One is a 512K SRAM and the other is an RTC with a built in crystal (M41T93RMY6F).
You can see the pins on the bottom now!