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Topic: ATMega 328 Breakout Board (Read 2530 times) previous topic - next topic

sirch

OK, I know it's been asked before and yes I have done A LOT of Googling but please read on...

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 like the look of the one from Evil Mad Scientist but at $11.75 plus $6.55 shipping to the UK it seems quite a lot for a single board.

So I was just wondering what anyone else has done?

Does anyone have a PCB layout they are prepared to share?

Is there enough interest to pool together and get a batch made?

olof_n

Electrodragon have a lot of bare PCBs.

Boarduino (1$), "Nano", "Pro Mini", "UNO" and more bare PCB boards.
Just skip to solder the LEDS and voltage regulator to get a low power.


fungus

#2
Jun 06, 2013, 04:54 pm Last Edit: Jun 06, 2013, 04:56 pm by fungus Reason: 1

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 like the look of the one from Evil Mad Scientist but at $11.75 plus $6.55 shipping to the UK it seems quite a lot for a single board.


The Diavolino comes complete with chip, crystal, etc. And it's red.

How about this one:

http://www.ebay.com/itm/140990800628

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

AlxDroidDev

Do you need the standard Arduino headers on this board, or is it a totally custom board, made to suit your application?
Learn to live: Live to learn.
Showing off my work: http://arduino.cc/forum/index.php/topic,126197.0.html

sirch

Thanks for the replies, some interesting thoughts.

AlxDroidDev - I have a couple of modules on their own boards (real time clock and an SD Card breakout - TWI and SPI) plus I need to wire another couple of IO pins so I don't really need a custom PCB or headers as I am happy to solder wires to it. So I am realy looking for a board to mount the ATMega on, program it and connct up the periferals.

Given my level of incompetance, inexperience and inability to get anything right first time it would be good to have a board that is labelled up with pin designations, etc. so I have some chance of connecting the right wires.

Chagrin

The Paperduino designs (http://txapuzas.blogspot.com/) might fit your needs.

fungus


Given my level of incompetance, inexperience and inability to get anything right first time it would be good to have a board that is labelled up with pin designations, etc. so I have some chance of connecting the right wires.


In that case ... I think the Diavolino is actually a good choice.

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

sirch



How about this one:

http://www.ebay.com/itm/140990800628




A bit off-topic but I've been thinking about that board and can't see how it would be used? It looks like none of the pads are connected so when something is soldered in how do things get connected?

sej7278


A bit off-topic but I've been thinking about that board and can't see how it would be used? It looks like none of the pads are connected so when something is soldered in how do things get connected?


its weird isn't it? it seems to be all over ebay whereas good old veroboard (aka stripboard) is nowhere to be found. that stuff is actually called perfboard and is just individual holes with no power rails.

i guess it means no cutting of tracks is needed (handy for chips) but then getting power around the board must be a mess of jumper wires.

hiduino

To use those perf boards you need to create solder bridges to adjacent holes to make your circuit.


fungus



How about this one:

http://www.ebay.com/itm/140990800628


A bit off-topic but I've been thinking about that board and can't see how it would be used? It looks like none of the pads are connected so when something is soldered in how do things get connected?


When things are in adjacent holes it's easy to join them underneath with a blob of solder.

Or ... usually at least one of them has a long wire that needs to be snipped off after soldering (eg. resistors), in that case you bend the leg over to touch the adjacent component before soldering it.

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

fungus


its weird isn't it? it seems to be all over ebay whereas good old veroboard (aka stripboard) is nowhere to be found.


This works better IMHO.


that stuff is actually called perfboard and is just individual holes with no power rails.
i guess it means no cutting of tracks is needed (handy for chips) but then getting power around the board must be a mess of jumper wires.


It's not a real advantage in practice and you don't realize how much time you spend cutting tracks until you stop doing it. Cutting tracks also wastes a lot of holes when you're trying to do miniature stuff.

If you insist on doing "power rails" you can just put a bare wire across a row of holes underneath the board  (solder the ends into place). Now you can poke wires through from above and solder them onto it. Voila! Power rail!

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

sirch

So how do you connect two components -e.g. connect a resistor to the pin of an IC? Big blob of solder? I am genuinely interested although I personally I don't find track cutting to be such a chore. For chips I often hacksaw across a number of tracks at once.

Back on topic I decided to go for an ATMega32 board (Arduino Leonardo), there are plenty on fleabay.

fungus

#13
Jun 09, 2013, 10:05 pm Last Edit: Jun 09, 2013, 11:07 pm by fungus Reason: 1

So how do you connect two components -e.g. connect a resistor to the pin of an IC? Big blob of solder?


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.

You can even jump more distance if you want to, the only limit is the length of your resistor leg...
No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

sej7278


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! i think i'll stick to veroboard (if i can find any!) although i did see some breadboard-style perfboard which looks like a good compromise:

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

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