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.
Behold . . . new dip adapters are born...
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No decoupling caps?
No Ground plane?
Are those vias tented? How do you get pins into them?
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Paulvdh wrote:
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
...
Bottom side of PCB has pads for two single row surface mount vertical headers.
...
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.
Last Edited: Sat. Feb 24, 2018 - 05:21 AM
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alank2 wrote:
BusBoard's adapter has pads for such :
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
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)
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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.
Last Edited: Sun. Feb 25, 2018 - 12:42 AM
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.
alank2 wrote:
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!
