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Author Topic: ATMega 328 Breakout Board  (Read 2024 times)
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Wahiawa, Hawaii
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You should check out some of these proto-boards, same vias as standard breadboards.

http://www.adafruit.com/products/571

They have a whole range of sizes.
http://www.adafruit.com/products/591

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I'll stick with wirewrapping:


* Wirewrap_back2.jpg (739.03 KB, 2517x2086 - viewed 39 times.)
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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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I want to do some low power (long battery life) stuff so I need to have a minimal circuit (no LEDs, USB, etc) and I was looking for a board to build this on.

I have been using Sparkfun's Pro-Mini for exactly this purpose.  They're easy to get hold of, and quite cheap at $10.  To get below ~1mA you just need to cut one trace to disconnect the regulator and power LED.  With this small modification (and appropriate programming) you can get the current consumption below 3uA.  The modification can be undone be connecting the two VCC contacts together.


Sparkfun have revised the PCB layout since I made this picture, but the cut is still in approximately the same spot.  The Pro Micro can also be modified, although it's slightly harder to do.
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Thanks Tim, that's the sort of thing I was looking for. But like I said I've initally gone for
http://www.ebay.co.uk/itm/New-Minimum-Development-Board-Core-System-Shield-Board-for-Atmega32-Mega32-AVR-/261121351546?pt=LH_DefaultDomain_0&hash=item3ccc0b9f7a

beacuse then I can just use the bear board plus chip in the final product
http://www.ebay.co.uk/itm/Blank-PCB-Development-Board-for-ATMEGA16-L-ATMEGA32-L-/230705452029?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item35b71dd3fd
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1) Put resistor through hole next to IC pin.
2) Bend resistor wire to touch IC pin (underneath board)
3) Apply solder to both
4) Snip off excess wire from resistor.

oh jees, that sounds awful!

Don't knock it 'til you've tried it.

i did see some breadboard-style perfboard which looks like a good compromise:

http://www.instructables.com/id/Perfboard-Hackduino-Arduino-compatible-circuit/?ALLSTEPS

Look at all the little extra jumper wires he had to put in, eg. The two little black ones below the caps on the crystal. I would have just bent the legs of the caps across underneath the board.

Also the blue power wire that goes around at bottom left, then has another jumper to get to the chip. Two whole wires where a blob of solder underneath the board would have done the job.


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Don't knock it 'til you've tried it.
....
Look at all the little extra jumper wires he had to put in, eg. The two little black ones below the caps on the crystal. I would have just bent the legs of the caps across underneath the board.

yes, i think i'll give it a go on an attiny85 board i'm putting together, not sure how i'd think it out though. i can't find any software (like fritzing, for linux) to do perfboard layouts, stripboard i can figure out as i place the bits, but perfboard requires much more planning before committing to solder it seems.

I'll stick with wirewrapping:

i've just been a little sick in my mouth ;-)
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Use expresspcb for laying out parts, easy to visualize things.

I don't know how to take your other comment.  You can do some pretty complex things, and if a change is needed its simple to make.
Unsoldering a blob to try and change a component because a resistor needs changing or something simple like that can lead to a mess.
Vs pulling the resistor out of a socket, or unwrapping a wire and moving it to another pin.
All depends on what you're comfortable with.
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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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I have 2 of these, right price, I like them for the 5 pin power and uart connector
http://www.ebay.co.uk/itm/K011-XINO-Basic-for-Atmel-ATMEGA-AVR-lowest-cost-Arduino-compatible-kit-/321138392983?pt=UK_Computing_Other_Computing_Networking&hash=item4ac556ff97

The xrf carrier boards plug straight into it
http://www.ebay.co.uk/itm/K012-XBBO-XBee-XRF-BlueBee-RFBee-break-out-board-NOW-added-new-features-/221233258481?pt=UK_Computing_Other_Computing_Networking&hash=item3382879ff1
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P18F4550 - That is spot on and, like you say, a good price
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