New energy harvesting IC from ST – SPV1050. It’s still in Preview.
At first glance it looks quite versatile. However, is 70mA enough to power the DW module? How large a capacitor will be needed?
I have been emailing nRF51822 module suppliers asking for pricing, availability and datasheets. The datasheets will be placed for now in Dewbly shared docsNordicModule data sheets. These are the replies.
From nRF firstname.lastname@example.orgXunTong Technology
Glad to get your email. this is Echo from XunTong Technology ,nice to know you.
About the datasheet of PTR5518, PTR5528 and PTR9018, see the file attaches, PTR5518 is CE and FCC is certificated, and PTR5528 and PTR9018 are not certificated.
For the Modules, we don’t programme the Chips NRF51822-QFAA, total 256K flash, 80K for BLE stack, others for your firmware.
David, no distributor in US, you can send sample orders and small amount orders on Alibaba-Aliexpress store, for large Qty orders, let’s disscuss the details .
David,would you pls simply introduced your project and product, we have enginners for technical support for cusomer’s development.
Thank you for your inquiry.
The samples are available now.
Sample price is U$8.- / FOB Korea.
MP(Mass Production) unit price is depending on the volume. (U$3.8 through U$4.8)
One reel q’ty is 500pcs as MOQ(Minimum Order Quantity)
What application are you considering and what is your yearly forcast quantity?
Please refer to the attached datasheet.
Should you have more questions please let me know.
Director of Sales & Marketing
RE: Raytac MDBT40 & Nano Module Enquiry – Touchstone-Labs
Alibaba advertises a 156mm x 156mm solar cell with 4.38 watt output. The space on Minitec enclosure for membrane keypad is 34.7mm x 19.6mm, or 680 mm2. The solar cell is 24336 mm2. 24336 / 680=35.8. 4.38 watts / 35.8 = about 120mW.
This LiPo battery
is 160 mAh * 3.7V = 0.592 watt-hours. 0.592 watt-hours / 0.120 watts = 4.9 hours to charge the battery using a piece of the advertised solar cell in direct sun at the equator at noon
if it’s cool. It won’t work out exactly like that but at least it’s a possibility.
The iPod nano 6 LCD is about 32 x 33, or 1070 mm2. If it was replaced with a solar cell the output might be around 0.2 watts.
I still think the OKW Minitec is best solution we have available to us now. It would be interesting to see how much power a solar cell on the front of it would provide in normal use (worn on the wrist with a short-sleeved shirt on a bright day with all the window coverings open).
The difference in quality between the 3D printed things, and the professionally made enclosures is huge. I’m pondering our enclosure choices:
- If we only make a few units, then it makes sense to use an off-the-shelf enclosure, even if the enclosure costs us $20+ a shot. It actually makes sense for us to buy some cool product like the iPod nano, or one of those flashy watches, tear-it-down, and jam in our own custom PCB. It makes sense as long as it isn’t more work than:
- Designing and printing our own enclosure. It will look crappy, but sometimes it’s possible to make a virtue out of a feature. e.g. make it look like tree bark? It makes sense to do this as long as it isn’t more work than:
- Using an off-the-shelf ugly box into which it is quick and easy to fit our PCB. Then we try to figure out some way to make it less odious with some sort of strap, or pouch. It might be possible to get a person who is handy with a needle and thread to make some clever kind of wrist strap.
- Focus on getting the PCB to work, and not worry about the enclosure. When it works, find some off the shelf plastic box like this, and use some duct tape, elastic, or other junk to make a wrist band.
This is a promising version – from Fujitsu.
This version from Laird is less expensive ($13 vs $17) and has some kind of “SmartBASIC” already installed to make it easier to use. Do you want SmartBASIC?
M: possible enclosure for a clunker
M: Can we buy enclosures from SKMEI and use them?
I really like this one but I bet is sucks juice.
must suck power
simple, utilitarian strap idea.
simple strap idea
iPod nano wrist thing:
This is what a 3-D printed case looks like:
Look how the magnetic clasp attaches to clothes.
But probably too small.
Never mind; they’re $150. But interesting how they can be used as a wristwatch.
I wonder what it’s dimensions are?
Good article. Good description of issues.
“In that light, rings are just a crutch, the temporary technological bridge we need to walk away from hardware forever. For now, though, that bridge is made of nothing but hot air.”
My opinions: It’s “evolution” at work.
* Random, thoughtless mutations of successful (iPhone?) DNA have not yet produced branch of animals that have found their niche in the gizmo food chain – a niche that at least allows them to live long enough to produce progeny.
* Rings/bracelets must have sufficient value – value that you can’t get, with less overall hassle, some other way. E.g. I’ll wear an insulin pump. I won’t wear a tv remote.
* If I have to wear it & it’s visible, it better say something positive about me, or be very cheap and highly functional.