Clean looking sensor node
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@NeverDie said:
Looks as though my small TH mote will have no problem fitting inside the OP's enclosure:
I can also configure my medium TH mote to also fit. The enclosure is too thin to accomodate AAA batteries, but I should be receiving the button cell batteries from China very soon.
Don't forget a capacitor parrallel to the button cell battery if you want it to last more than a few days ;)
@Nca78 said:
Don't forget a capacitor parrallel to the button cell battery if you want it to last more than a few days ;)
That's good input, as I haven't yet tried running it on a button cell. Is a button cell alone just not able to keep up with the Tx load? I had wanted to avoid button cells altogether, but even an AAA battery has too wide a diameter to fit in this enclosure.
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It might be worthwhile to make a board specifically for this enclosure. It would necessarily have to have a somewhat similar size as the board that was in it, so that it could mount an LED near the LED window, and a micro USB at the USB window, all while fitting the groves of the enclosure.
BTW, how did you get that sticky black foam tape out of it? I tried scrapping it off, but I didn't manage to remove all of it.
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@Nca78 said:
Don't forget a capacitor parrallel to the button cell battery if you want it to last more than a few days ;)
That's good input, as I haven't yet tried running it on a button cell. Is a button cell alone just not able to keep up with the Tx load? I had wanted to avoid button cells altogether, but even an AAA battery has too wide a diameter to fit in this enclosure.
@NeverDie said:
That's good input, as I haven't yet tried running it on a button cell. Is a button cell alone just not able to keep up with the Tx load? I had wanted to avoid button cells altogether, but even an AAA battery has too wide a diameter to fit in this enclosure.
No it can't keep up with it without a serious voltage drop, especially at startup and with RFM radio. A 100µF ceramic capacitor (and sleep between successive tx in your code) should be enough from what I read from scalz who made a few boards with button cell + RFM.
I just uploaded version 0.2 of my dedicated board to Seeed, it should be just the right size this time :) Led is in front of the led window but on USB side I don't have anything, it's just a vent.
For the black tape I don't remember having so much pain to remove it, maybe it's different between enclosures, I will tell you when I receive the next one. -
@NeverDie said:
That's good input, as I haven't yet tried running it on a button cell. Is a button cell alone just not able to keep up with the Tx load? I had wanted to avoid button cells altogether, but even an AAA battery has too wide a diameter to fit in this enclosure.
No it can't keep up with it without a serious voltage drop, especially at startup and with RFM radio. A 100µF ceramic capacitor (and sleep between successive tx in your code) should be enough from what I read from scalz who made a few boards with button cell + RFM.
I just uploaded version 0.2 of my dedicated board to Seeed, it should be just the right size this time :) Led is in front of the led window but on USB side I don't have anything, it's just a vent.
For the black tape I don't remember having so much pain to remove it, maybe it's different between enclosures, I will tell you when I receive the next one. -
On my medium node, I found that if I used right-angle FTDI header pins and if I splayed the antenna and the Temp-humidity-pressure sensor out horizontally, then the overall thickness was low enough that I could fit it inside the OP's enclosure.
Also, I think that if, rather than clipping the LED's legs after soldering it close to the board, I instead left the LED legs long, then I could bend it over and have it pointed at the LED window on the OP's enclosure, to maximize its visibility outside the closed enclosure. So, on a future version, I'll try that. -
After a long-wait, I received my so called "tabbed" CR2477 batteries today from China via AliExpress. According to the seller, they would look like this:
and so that is what I was expecting. Instead, what the seller sent me was:
which obviously has no tabs. :cry:Anyhow, the second photo shows the depth of the battery in relation to the OP's case. It looks to me as though with tabs it likely would have been too thick for the cover to snap back on the OP case.
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@NeverDie
:open_mouth: not cool
I hope your 2477 will work well ;)
my little xp about coincells showed me that i can't trust ali coincells.. well i tried only few orders, but those wasted my time searching for bugs whereas batt were discharged and didn't check this in first place as i was using fresh ali coincells. I was thinking it couldn't be that! Then i checked their voltage in case...and was surprised!
Changing for good and strong coincell was day&night.if it can help you to not run in dumb issue, for future :)
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@NeverDie
:open_mouth: not cool
I hope your 2477 will work well ;)
my little xp about coincells showed me that i can't trust ali coincells.. well i tried only few orders, but those wasted my time searching for bugs whereas batt were discharged and didn't check this in first place as i was using fresh ali coincells. I was thinking it couldn't be that! Then i checked their voltage in case...and was surprised!
Changing for good and strong coincell was day&night.if it can help you to not run in dumb issue, for future :)
@scalz said:
@NeverDie
:open_mouth: not cool
I hope your 2477 will work well ;)
my little xp about coincells showed me that i can't trust ali coincells.. well i tried only few orders, but those wasted my time searching for bugs whereas batt were discharged and didn't check this in first place as i was using fresh ali coincells. I was thinking it couldn't be that! Then i checked their voltage in case...and was surprised!
Changing for good and strong coincell was day&night.if it can help you to not run in dumb issue, for future :)
Urban Dictionary: "get shanghaied"
www.urbandictionary.com/define.php?term=get shanghaied
Top Definition. get shanghaied. verb, ditransitive, passive (with to Be or to Get). to be swindled, cheated, lied to, robbed, stolen from, duped, conned, deceived.Not sure what I'll do with the "non-tabbed" batteries. Shipping costs between the US and China are asymmetric, and it would probably cost me more in time and money to ship them back with tracking to the seller than I would get in a refund. Oh well, I guess I'll be buying batteries from Digikey in the future. It will cost twice as much, but at least I'll get the real thing.
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I just now ordered this CR2460 battery from Digikey: http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail&itemSeq=212190252&uq=636150784616350020
It's a bit thinner and should have a better chance of fitting inside the OP case. -
I just now ordered this CR2460 battery from Digikey: http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail&itemSeq=212190252&uq=636150784616350020
It's a bit thinner and should have a better chance of fitting inside the OP case.Epilogue: I get a call from Digikey to tell me that they can't ship the button cells by first class mail because they contain lithium. Mind you, I only ordered 3 of them. Instead, they can only be shipped by either UPS ground or FedEx ground, both of which will cost me about $10 for the shipping alone. :grimacing: Yet, USPS apparently had no trouble delivering the CR2477 button cells from China using ePacket delivery. Argh, it's all just ridiculous!
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Epilogue: I get a call from Digikey to tell me that they can't ship the button cells by first class mail because they contain lithium. Mind you, I only ordered 3 of them. Instead, they can only be shipped by either UPS ground or FedEx ground, both of which will cost me about $10 for the shipping alone. :grimacing: Yet, USPS apparently had no trouble delivering the CR2477 button cells from China using ePacket delivery. Argh, it's all just ridiculous!
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@NeverDie no, USPS are not ok with that. http://pe.usps.gov/text/pub52/pub52c6_004.htm#ep270347
@mfalkvidd said:
@NeverDie no, USPS are not ok with that. http://pe.usps.gov/text/pub52/pub52c6_004.htm#ep270347
Not that it matters, but I wonder why is it acceptable for lithium batteries to be shipped installed in equipment, but unacceptable if not installed?
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@mfalkvidd said:
@NeverDie no, USPS are not ok with that. http://pe.usps.gov/text/pub52/pub52c6_004.htm#ep270347
Not that it matters, but I wonder why is it acceptable for lithium batteries to be shipped installed in equipment, but unacceptable if not installed?
@NeverDie my guess is that the rulemakers took a pragmatic approach. Banning batteries in equipment might have been too hard, which could have brought down the entire proposition. So they opted for rules that are less safe than total ban, but more safe than no rules at all.
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@NeverDie my guess is that the rulemakers took a pragmatic approach. Banning batteries in equipment might have been too hard, which could have brought down the entire proposition. So they opted for rules that are less safe than total ban, but more safe than no rules at all.
My two cents :D
Batteries inside equipments are protected from shock by said equipment, shocks/bending beeing one of the main reasons for battery fires.
It could also be related to the "density" of batteries. Having one battery burning inside an equipment will slow down the propagation of the fire and is relatively easy to deal with a fire estinguisher.
Having a fire in one battery that will propagate to other batteries shipped together is a nightmare.But I'm surprised they apply this rule (that I thought were made to deal big rechargeable batteries) to a bunch of button cells
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LOL. This is the ultimate catch-22: I can't mail the falsely advertised batteries back to China, even if I wanted to! The only way to do it would be to first install them in some equipment and then ship the equipment, but then they would be used batteries and no longer new, so the seller could refuse a refund on those grounds. Since returning them is impossible, maybe I can appeal to Ali Express for a refund without returning them. This is becoming entertaining.... A refund from Ali Express would almost cover the cost of shipping from Digikey.
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I just received the white version and it's gorgeous ! Ordering bunch now to put everywhere in the house :D
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Link is here but unfortunately it says "no more available" :(
Found some here at 3€ :
https://www.aliexpress.com/item/Qi-Wireless-Newest-Charger-for-iPhone-Samsung-Galaxy-S3-S4-Note2-Nexus-All-free-shipping/32735986077.html
