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Lgbeno

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  1. Like
    Lgbeno got a reaction from Adnan in Energy harvesting   
    I cringe to see all of those resistors...
     
    Just remember that BQ25504 and TPS61097 are not functionally the same.
     
    TPS61097 isn't going to do MPPT on a solar panel although maybe one additional resistor to limit the charging current into the super cap would be all that you need. This also assumes that you have a panel that has Open voltage of a few 100mV less than 2.7.
     
     
    Sent from my iPhone using Tapatalk
  2. Like
    Lgbeno got a reaction from bluehash in Energy harvesting   
    BQ25504 looks like your ticket then. Taiyo Yuden has some decent super caps.
     
     
    Sent from my iPhone using Tapatalk
  3. Like
    Lgbeno got a reaction from chicken in New MSP430 Wireless Sensor Node   
    Status update: I now have 6 units built and tested. The enrf24 library has also now been updated to support RF75 and I've tested over the air compatibility with nRF24 based nodes
     

     
    I made the connector pin out compatible with plugging direct into the launchpad and getting power from J6.
     
    Power consumption tests show that I can get it down to 350uA sleep current from a single AA battery. That translates to about 1 year of battery life. I think that this can be improved but need to dig into the culprit.
     
    Finally, I just ordered 50 PCBs and a stencil from Elecrow so I'm ready to make some beta units! I'd love to take pre-orders.
     
    --------------------------------------------------------------------------------------------------------------
    Vote for my project in the Hackaday Prize! https://hackaday.io/project/4648-analogio
  4. Like
    Lgbeno got a reaction from chicken in New MSP430 Wireless Sensor Node   
    Well boards have arrived and I started building them up. So far I have 2 of them built up and tested.
     
    Now the real work begins in writing Energia libraries!
     

     

     

     

     

     
    One change that I'm pondering is changing the connector pinout slightly to support this configuration and take power from the launchpad:
     

     
     
    Sent from my iPhone using Tapatalk
  5. Like
    Lgbeno got a reaction from tripwire in New MSP430 Wireless Sensor Node   
    Status update: I now have 6 units built and tested. The enrf24 library has also now been updated to support RF75 and I've tested over the air compatibility with nRF24 based nodes
     

     
    I made the connector pin out compatible with plugging direct into the launchpad and getting power from J6.
     
    Power consumption tests show that I can get it down to 350uA sleep current from a single AA battery. That translates to about 1 year of battery life. I think that this can be improved but need to dig into the culprit.
     
    Finally, I just ordered 50 PCBs and a stencil from Elecrow so I'm ready to make some beta units! I'd love to take pre-orders.
     
    --------------------------------------------------------------------------------------------------------------
    Vote for my project in the Hackaday Prize! https://hackaday.io/project/4648-analogio
  6. Like
    Lgbeno got a reaction from Fmilburn in New MSP430 Wireless Sensor Node   
    Status update: I now have 6 units built and tested. The enrf24 library has also now been updated to support RF75 and I've tested over the air compatibility with nRF24 based nodes
     

     
    I made the connector pin out compatible with plugging direct into the launchpad and getting power from J6.
     
    Power consumption tests show that I can get it down to 350uA sleep current from a single AA battery. That translates to about 1 year of battery life. I think that this can be improved but need to dig into the culprit.
     
    Finally, I just ordered 50 PCBs and a stencil from Elecrow so I'm ready to make some beta units! I'd love to take pre-orders.
     
    --------------------------------------------------------------------------------------------------------------
    Vote for my project in the Hackaday Prize! https://hackaday.io/project/4648-analogio
  7. Like
    Lgbeno got a reaction from tripwire in New MSP430 Wireless Sensor Node   
    Well boards have arrived and I started building them up. So far I have 2 of them built up and tested.
     
    Now the real work begins in writing Energia libraries!
     

     

     

     

     

     
    One change that I'm pondering is changing the connector pinout slightly to support this configuration and take power from the launchpad:
     

     
     
    Sent from my iPhone using Tapatalk
  8. Like
    Lgbeno got a reaction from tripwire in New MSP430 Wireless Sensor Node   
    Yup, my theory is that if the nodes become cheap enough, we'll think of all kinda of places to stick these things.
     
    For me, I'm monitoring stuff inside of BeeHives, if I can use twice as many sensors for the same out of pocket expense, I'm really happy
     
     
    Sent from my iPhone using Tapatalk
  9. Like
    Lgbeno got a reaction from Rickta59 in New MSP430 Wireless Sensor Node   
    Status update: I now have 6 units built and tested. The enrf24 library has also now been updated to support RF75 and I've tested over the air compatibility with nRF24 based nodes
     

     
    I made the connector pin out compatible with plugging direct into the launchpad and getting power from J6.
     
    Power consumption tests show that I can get it down to 350uA sleep current from a single AA battery. That translates to about 1 year of battery life. I think that this can be improved but need to dig into the culprit.
     
    Finally, I just ordered 50 PCBs and a stencil from Elecrow so I'm ready to make some beta units! I'd love to take pre-orders.
     
    --------------------------------------------------------------------------------------------------------------
    Vote for my project in the Hackaday Prize! https://hackaday.io/project/4648-analogio
  10. Like
    Lgbeno got a reaction from Adnan in Energy harvesting   
    BQ25504 looks like your ticket then. Taiyo Yuden has some decent super caps.
     
     
    Sent from my iPhone using Tapatalk
  11. Like
    Lgbeno got a reaction from Adnan in Energy harvesting   
    Cheap regulators often have high quiescent current so I would look into that.  Also in solar, some special consideration needs to be given for the MPPT of the solar panel because the panel will stop producing power if it's voltage is pulled too low.  By far the cheapest way to do this is with the $1 solar light and the boost converter method.  
     
    The ASIC inside the solar light handles the MPPT and NiMh charging, then the boost gives your circuit the right voltage.  SuperCaps don't really store as much energy as batteries and they are more expensive.  They are arguably more reliable for larger pulses of current but I don't think that it matters in this case.  You can boost to whatever voltage you like based on part selection as well.
     
    I started using NCP1400 for cost but I think the TPS61097A-33 is lower power.  Regardless, I figure I can get about 1 year out of a single AA battery so I think that is good enough.
  12. Like
    Lgbeno got a reaction from Adnan in Implementing WSN   
    I think that the only path forward is to get started  You'll find out quickly what needs to be optimized and what is "good enough"
  13. Like
    Lgbeno got a reaction from Adnan in Implementing WSN   
    MSP430FR5969 also has AES so that brings you to the difference between cc1200 and cc1120 is 2dB of Tx power.  If I were you I would do CC1200 and push the limits on range as far as possible with that extra 2dB.
     
  14. Like
    Lgbeno got a reaction from Adnan in Implementing WSN   
    A quick glance shows that the two major differences are that CC1200 adds an AES-128 Accelerator and has 2dB extra Tx power.
     
    If you don't care about cost, just do CC1200 it is a superset of CC1120 and you can always pair down your code to move to CC1120.
  15. Like
    Lgbeno got a reaction from Adnan in Implementing WSN   
    You're lucky.
    Buy all of these:
     
    http://www.digikey.com/product-detail/en/CC1120EMK-868-915/296-30208-ND/2749371
    http://www.digikey.com/product-detail/en/BOOST-CCEMADAPTER/296-36889-ND/4379861?WT.mc_id=IQ_7595_G_pla4379861&wt.srch=1&wt.medium=cpc&WT.srch=1
    http://www.digikey.com/product-search/en?KeyWords=MSP-EXP430FR5969&WT.z_header=search_go
     
    and if you want to do cc1200, add this:
    http://www.digikey.com/product-detail/en/CC1200EMK-868-930/296-36407-ND/4271563
     
    Each node will cost you $95
     
    You can use Energia with this setup but it is not plug and play by any means, you'll have to do a lot of work with writing libraries for the radio and your WSN.
     
    EnergyTrace should be possible BUT I think that you need to use Code Composer Studio for this feature, someone who has tried it out can correct me if I am wrong.
  16. Like
    Lgbeno got a reaction from Adnan in Implementing WSN   
    Doesn't really matter, you'll just need to think about how much money that you want to spend and how that you will construct your test setup.
     
    These radios are geared toward this kit http://www.digikey.com/product-detail/en/CC1200DK/296-36405-ND/4271561
     
    The kit comes with CC1200 modules and you can buy the cc1120 modules for another $99
     
    With these kits it will be difficultto use anything besides the built in MSP430F5438A.
     
    Alternatively http://www.digikey.com/catalog/en/partgroup/cc1200-evaluation-module-kit-420-470mhz/40641 has pin headers that you can wire to whatever you want.
     
    To kinda put it bluntly, none of the options are ideal because to develop and test sensor networks you need a lot of nodes and if each node costs you $50 or $150, thats a severe limitation.
     
    Thats why I built my own cheap nodes http://forum.43oh.com/index.php?/topic/8750-New-MSP430-Wireless-Sensor-Node
     
    Its hard to have your cake and eat it too
     
     
    Sent from my iPhone using Tapatalk
  17. Like
    Lgbeno got a reaction from cubeberg in Geeky Tattoo   
    Cool Tattoo!
  18. Like
    Lgbeno got a reaction from Fmilburn in Energia sensor code and library examples   
    Ahh I'm actually doing something sneaky with this http://forum.43oh.com/index.php?/topic/8750-New-MSP430-Wireless-Sensor-Node
     
    It is possible
     
     
    Sent from my iPhone using Tapatalk
  19. Like
    Lgbeno got a reaction from Fmilburn in New MSP430 Wireless Sensor Node   
    Well boards have arrived and I started building them up. So far I have 2 of them built up and tested.
     
    Now the real work begins in writing Energia libraries!
     

     

     

     

     

     
    One change that I'm pondering is changing the connector pinout slightly to support this configuration and take power from the launchpad:
     

     
     
    Sent from my iPhone using Tapatalk
  20. Like
    Lgbeno got a reaction from bluehash in Solar Powered Light. Good for hacking/IoT - $10 Amazon   
    I received my light today and had to check out the fit for the MSP430 sensor node that I also received and built up.
     
    Looks like a decent fit. Now if only I had more time figure out how to connect the PIR and control the LEDs with the MSP430!
     
     
    Sent from my iPhone using Tapatalk
  21. Like
    Lgbeno got a reaction from RobG in New MSP430 Wireless Sensor Node   
    Well boards have arrived and I started building them up. So far I have 2 of them built up and tested.
     
    Now the real work begins in writing Energia libraries!
     

     

     

     

     

     
    One change that I'm pondering is changing the connector pinout slightly to support this configuration and take power from the launchpad:
     

     
     
    Sent from my iPhone using Tapatalk
  22. Like
    Lgbeno got a reaction from yyrkoon in Solar Powered Light. Good for hacking/IoT - $10 Amazon   
    I received my light today and had to check out the fit for the MSP430 sensor node that I also received and built up.
     
    Looks like a decent fit. Now if only I had more time figure out how to connect the PIR and control the LEDs with the MSP430!
     
     
    Sent from my iPhone using Tapatalk
  23. Like
    Lgbeno got a reaction from bluehash in Solar Powered Light. Good for hacking/IoT - $10 Amazon   
    Kinda coincidental, my family and I are taking a vacation in Door Co WI where there are a few Harbor Towns on Lake Michigan. Taking a stroll down the docks and what do I see:

     
    Would make a good foot traffic counter!
     
     
    Sent from my iPhone using Tapatalk
  24. Like
    Lgbeno got a reaction from tripwire in Solar Powered Light. Good for hacking/IoT - $10 Amazon   
    Kinda coincidental, my family and I are taking a vacation in Door Co WI where there are a few Harbor Towns on Lake Michigan. Taking a stroll down the docks and what do I see:

     
    Would make a good foot traffic counter!
     
     
    Sent from my iPhone using Tapatalk
  25. Like
    Lgbeno got a reaction from spirilis in Solar Powered Light. Good for hacking/IoT - $10 Amazon   
    Kinda coincidental, my family and I are taking a vacation in Door Co WI where there are a few Harbor Towns on Lake Michigan. Taking a stroll down the docks and what do I see:

     
    Would make a good foot traffic counter!
     
     
    Sent from my iPhone using Tapatalk
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