My MYSX Multisensors board
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@tbowmo: thx. So I am happy.
I will post schematic soon, need to clean my notes! it's rather simple.@shabba: thx. I am thinking about it...I don't know for the moment the easier/cheaper way for me and you. China or homemade batch..and there is a fablab near my home, which is able to handle mini batch...
And it is chinese new year so I can't get a quote. I need to do the BOM now to evaluate. But I have tried to keep things cheap vs perf vs quality..It's 2layer (so cheaper, maybe for emi it would be better 4layer, but I will see), radio should not be included in price (we can choose which one so), atmel or passives are cheap, not too much ic. I am much more worried about sensors soldering china price...But I will see, it's planned. -
Really great project. Thanks for giving me ideas and inspiration. This was my next step to go for after my thermostat and dimmer project
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For the box
Is the battery kept away from the antenna part of the design. My question is is the board longer than an AA battery including battery "connectors" -
If you have space issues i think you should go for 0402 size, its not that hard to solder if you have a magnifing lamp, a good soldering iron, a tweezers and some thin soldering iron :)
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Yep I have already all these tools ;)
I have already soldered 0402, for sensebender for instance :) I ordered 3 boards at oshpark, couldn't wait! It works well.
But when I can, I prefer 0805, or 0603 min. My way to share. 0402, not everyone will try, nor 805 I know..! And I prefer to minimize mistake source , less small things, less error possibilities at prototyping. I could have choosed atmel vqfn too!
I like when I see someone sharing 0603/0805 files. When I see something 0402 and really need it, I make it 0805/0603 ;)
For this board I think 0603 min is ok. For the moment it's 0805, I will try to add a little bit more clearance before ordering it.
It could be a little bit smaller with 0402, but not much, there are antenna area, and battery connector, components on top... And between a 6 or 6.5cm pcb...hum is it really useful, I am far away of coincell size so! And I don't want to put radio on bottom, between the pcb and battery holder. it would add more thickness.Sensebender is a very special case, a challenge. It is the ultra mini sensor board. but no batt holder. Add it and a box, it's not the same size. There are minimal
