Lgbeno 189 Posted May 5, 2015 Share Posted May 5, 2015 These are low Iq boost converters so that you can run a msp430 off of a single AAA like the ones in these cheap solar lights. Sent from my iPhone using Tapatalk Quote Link to post Share on other sites
Lgbeno 189 Posted May 5, 2015 Share Posted May 5, 2015 @@bluehash, I think it's this one (see message 31). This one actually uses TPS61097A-33 it is a boost mode only regulator. Should be perfect for any single cell application. Sent from my iPhone using Tapatalk bluehash 1 Quote Link to post Share on other sites
cubeberg 540 Posted May 5, 2015 Author Share Posted May 5, 2015 @@Lgbeno - I'm in for 5 if that's cool. Quote Link to post Share on other sites
dubnet 238 Posted May 6, 2015 Share Posted May 6, 2015 @@Lgbeno Please put me down for two units. Thanks! Quote Link to post Share on other sites
Lgbeno 189 Posted May 7, 2015 Share Posted May 7, 2015 @@Lgbeno - I'm in for 5 if that's cool. @@Lgbeno Please put me down for two units. Thanks! Awesome! @@dubnet, I sent you a PM and cubeburg, I'll send an email. I've been testing the supplies for about 24 hours now and still going strong. First I tested the voltage output, then I hooked up one of my Droplet Wireless temp sensors. It is setup to transmit every 10 seconds and keeps chugging along. Here's the data: Next I'll add current and voltage measurements Voltage Output: Solar Cell Current (battery voltage is 1.248V) The final product: The particular light that I bought from Home Depot had a nice area inside of it for Electronics. So far this has been pretty rain proof and still breathes to keep out condensation. Also, I kept the LED connected and that was drawing power all night as well so I'm thinking that I'm net positive on the power budget. Time will tell... Quote Link to post Share on other sites
dubnet 238 Posted May 7, 2015 Share Posted May 7, 2015 @@Lgbeno Like the pics. Now I can see why the board was only 17 cents...next time don't waste so much space on the board layout. Seriously though....thanks for making these available. I will respond to your PM as soon as I send this post. Quote Link to post Share on other sites
cubeberg 540 Posted May 12, 2015 Author Share Posted May 12, 2015 Got my boards today! Excited to this these out. Wife is out of town for a week, so I should hopefully have some spare time to try it out. I still need to put together a board - I've got some 2152's (20 and 14 pin) that I got cheap from Newark - looks like they've still got a bunch of their MSP430's on sale (example - http://www.newark.com/texas-instruments/msp430g2152in20/microcontroller-mcu-16-bit-msp430/dp/24T4648?CMP=AFC-OP?gross_price= - $0.55 each) - need to see if the NRF library will fit and whip up a board. Quote Link to post Share on other sites
cubeberg 540 Posted May 12, 2015 Author Share Posted May 12, 2015 Nope - looks like probably not - not enough flash - better see if I can find some other chips. Quote Link to post Share on other sites
Lgbeno 189 Posted May 12, 2015 Share Posted May 12, 2015 Well there is always this one http://www.newark.com/texas-instruments/msp430g2302in20/microcontroller-mcu-16-bit-msp430/dp/24T4680 Those are crazy prices. For fun I did a search on Digikey and found a SiLabs EFM8 for 35 cents, crazy... Anyway, I digress but I was able to get the current sensing up and running in my solar light. It looks like there is plenty of power being produced. Quote Link to post Share on other sites
Lgbeno 189 Posted May 25, 2015 Share Posted May 25, 2015 I found a great water proof enc at Menards today for about $6.85 (does not include the 11% rebate!). Way cheaper that what I could find on digikey & mouser!Sent from my iPhone using Tapatalk cubeberg 1 Quote Link to post Share on other sites
cubeberg 540 Posted May 26, 2015 Author Share Posted May 26, 2015 Looks nice! Any idea if it'll hold up to sun as well? I have some cheap dollar-store "tupperware" with a seal - but I seriously doubt it'll hold up in the sun. BTW - got my first single-battery node up and running this weekend! Works like a champ. Just need to modify my code to take the battery voltage from a pin so I can monitor drain. Already started converting a radioshack rain sensor to a custom board - it'll be powered by one of these as well. Anybody have experience with inexpensive waterproofing? I saw some suggestions of clear nailpolish and clear polyurethane spray. Needs to be easy enough to come back and re-solder if I have to fix something or add a connection. Quote Link to post Share on other sites
spirilis 1,265 Posted May 26, 2015 Share Posted May 26, 2015 That looks like some waterproof case I spent way, way too much for @ REI for stowing my stuff in my kayak or camping. IIRC I left it outside for over a year .... eventually it did leak a little bit but it held up to the sun for sure. Quote Link to post Share on other sites
Lgbeno 189 Posted May 26, 2015 Share Posted May 26, 2015 http://outdoorproducts.com/watertight-boxes/ Yes, i,ve had one in my mouser shopping cart for a long time at $25 then Saw these, quickly tossed 4 in the card and my wife just looked at me strangely. Its polycarbonate as far as I know that stuff does well in the sun. Im sure it will ultimate breakdown but it will take years. Sent from my iPhone using Tapatalk Quote Link to post Share on other sites
Lgbeno 189 Posted May 26, 2015 Share Posted May 26, 2015 Looks nice! Any idea if it'll hold up to sun as well? I have some cheap dollar-store "tupperware" with a seal - but I seriously doubt it'll hold up in the sun. BTW - got my first single-battery node up and running this weekend! Works like a champ. Just need to modify my code to take the battery voltage from a pin so I can monitor drain. Already started converting a radioshack rain sensor to a custom board - it'll be powered by one of these as well. Anybody have experience with inexpensive waterproofing? I saw some suggestions of clear nailpolish and clear polyurethane spray. Needs to be easy enough to come back and re-solder if I have to fix something or add a connection. http://www.mouser.com/Search/m_ProductDetail.aspx?Techspray%2f2108-12S%2f&qs=sGAEpiMZZMvJqaFk9BIiv4zFCTyhAuSzRGnZB8oiqmU%3d You might want to look at this. I don't think it will make it water proof but will greatly reduce environmental exposure. You can burn it off with a solder iron (dont' inhale fumes) or i saw a remover pen on time. Sent from my iPhone using Tapatalk Quote Link to post Share on other sites
Lgbeno 189 Posted May 26, 2015 Share Posted May 26, 2015 Having some fun with nRF24 today. This library is so easy to use, thanks @@spirilisSent from my iPhone using Tapatalk spirilis and reaper7 2 Quote Link to post Share on other sites
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