My Slim 2AA Battery Node
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I've now ordered yet another prototype version (1.4):
http://dirtypcbs.com/view.php?share=13310&accesskey=58c87fe605eb91958938f70b5efc8629Eagle brd-file.
Photo here.
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I bought a few enclosures... "mini trunking" seems to be the correct term. This time it was ABS and a little more clear white colour and glossy finish. I think I spent around 2hrs cutting them nicely into >200pcs. 50% 23cm and 50% 19cm lengths.
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Very nice design. Any video on installation of bootloader with various settings described in the original post?.
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Great idea using this housing.
Why didn't you use CR batteries to decrease size ?
http://www.digikey.com/product-detail/en/CR1220/P033-ND/269740 -
2AA batteries have approximately 2000mAh capacity. CR1220 has 35mAh. So for the same capacity, more than 50 CR1220 would be needed. That wouldn't save space :)
But CR1220 has lower self-discharge so they can be a good alternative for things that are really low-power, or don't need long battery life. -
Great idea using this housing.
Why didn't you use CR batteries to decrease size ?
http://www.digikey.com/product-detail/en/CR1220/P033-ND/269740@ahmedadelhosni I've read a few reports from people with radio module issues after some time on CR "coin cell" batteries. The expected battery life time then doesn't match the result. I think you can find references by searching.
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m26872, I just wanted to say thank you for your work on this project and for sharing it with everybody. :+1:
I've just ordered the ATMEGAs to build 5 nodes.
How confident are you about the V1.4 PCB ? If you don't see any issue with them at this point I think I'll take the whopping $14 risk :yum: -
Aha..now I understood the reason. Thanks
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m26872, I just wanted to say thank you for your work on this project and for sharing it with everybody. :+1:
I've just ordered the ATMEGAs to build 5 nodes.
How confident are you about the V1.4 PCB ? If you don't see any issue with them at this point I think I'll take the whopping $14 risk :yum:@martkrui I'm not confident until I've tested one, but usually errors can be fixed with some ugly mods if necessary. ;-)
BTW I added to the info that any/every DirtyPCB money from this share will be donated to MySensors.org.
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Like the board and ordered it. Can you also post exactly the capacitor types? Keep up the good work.
@betonishard There aren't any exact values or types, but good start would be
Near the radio supply: One radial electrolytic >=4.7uF >=10V capacitor together with one ceramic (range 1pF - 1uF. I use different.).
The rest (C1, C2, C3): 0.1uF ceramic, where the value probably matters most for C2 (the Reset capacitor)
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@betonishard There aren't any exact values or types, but good start would be
Near the radio supply: One radial electrolytic >=4.7uF >=10V capacitor together with one ceramic (range 1pF - 1uF. I use different.).
The rest (C1, C2, C3): 0.1uF ceramic, where the value probably matters most for C2 (the Reset capacitor)
@m26872
Thanks... Maybe it is answered, but I didn't quite catch it. 3v will be fed to the radio, but isn't the 3.3 important instead of 3v? I don't see any stepup. Is your range acceptible?Thanks...
