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username last won the day on June 8 2018

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  1. For hobby use with low pin counts, yes, always G2553. For commercial use or if more pins are needed, I go with freescale MCUs or whatever i'm forced to use. Yes, I likewise hate the arduino 5V... 3.3V is fine for me in every application even in low power.
  2. Very cool that you were able to implement a stable workaround. I can't remember, did you by chance get your sensorless algorithm working? Do you have a video by chance? XD . When I did mine I used Arm core to have a bit more beef & filter options. This was a dev board I made for it, not meant to be tiny. I'll post a video hopefully in a couple days on it but i'd be awesome to see your implementation working as well.
  3. It could be me failing at driver writing but I do all my drivers from the ground up in CCS(starting usally with the TI example code). Never touched energia. I've heard of work arounds to get glitchless opperation of TI MSP430 PWM pins but most of them involve waiting. With a BLDC sensorless algorithm, there is no time to wait and all PWM generation must be %100 consistant to reduce jitter.
  4. Hey all, Been awhile since i've posted something. Here was a small portable 2.4GHz transceiver(CC2500) that I made. This can operate via battery or USB power. USB charges the battery. Has reverse + UVLO + OCLO protection (hence all the transistors on the right portion of the board). Here is a closeup of the RF chain. I used an integrated balun to reduce component counts. I use a 0603 tripad to switch RF output between SMA & chip antenna (unpopulated in pic). I used a coplanar waveguide as a TL. System seemed to be fairly efficient. I get 2.4dBm output power when using the 0 dBm p
  5. MSP430s have glitchey PWM operation. I wouldn't recommend them for this application. A large dev effort would be to get ideal operation out of the PWM pins which ideally shouldn't be your focus. Feel free to chime in someone if i'm mistaken.
  6. Seems like everyone has their own 3D printer. Here is the one I got for ~330 USD. I don't need any real fancy performance. Just need basic boxes and stuff. http://www.ebay.com/itm/Folger-Tech-Prusa-i3-RepRap-Full-3D-Printer-Kit-w-Clear-Acrylic-Frame-/231301357105
  7. This is huge news. Kinda scares me. Freescale struck me as a lot more innovative and bleeding edge where as nxp was expensive but had decent documentation(and not bleeding edge forsure). I hope all the freescale products don't double in price over this. I'm guessing we may see a few counter merges as a result of this. ST & TI?
  8. username


    Basically a new cosom/xively? Looks like a great interface with a good feature set. Very impressive. Best of luck with the site! I'll certainly keep it in mind when I run into another streaming application/project. Somewhere near the bottom of your homepage for non logged in users i'd recommend adding that pricing table. Some people won't bother registering unless they know beforehand the model of the site. Edit: Also not sure why but the login button doesn't work for me. Using firefox but it may be a adblock/firewall issue. Signup worked fine. Once I logged out I couldn't get back in.
  9. Hmmm.... in the spirit of 43oh you could make 229 balls of fire demonstrating your fierce loyalty towards the msp430
  10. I'm kinda creeped out by where I moved to as well and was going to do the same thing. I'd use PIR modules and ultra sound modules and have a few different nodes across my house using the NRF 2.4ghz modules. Wireless receive is expensive in terms of RF & current. I'd have a powered hub thats always in receive and have sensors that transmit every 1 - 10 seconds. This method amounts to uA of current usage average for the radio. If ~2x messages are lost or a breach message is sent, have the alarm trip. Sensors would be battery powered and need a recharge every 1-2 months. Would use a lithium
  11. You could create a CPU with 229 cores! You could put Intel i7 quad core to shame! Should only take a week or 2 to make. Edit: Or you could blink like 229x~30 LEDs!
  12. Hey guys, Glad to hear you guys got your controllers and hope they work well for you! Europe VAT tax is a beast. Sadly I can't legally mark them as a gift . US has no VAT but it has some of the highest business taxes. Social services / entitlements are very expensive . Not to get into politics but be careful what ya vote for.
  13. Happy to see it back up, thanks for maintaining the site!
  14. If you bought an off the shelf weight scale those usually have force sensors(load cells) in them. However, you would risk going over their rated limit with a full couch weight (even divided by 4). Furthermore, they are probably not designed to have constant weight on them. While this may be a bit difficult / awkward, if you had a webcam/camera pointed at the couch you probably could write an image algorithm to detect your dog. Or, if there any internal points in your couch that compress based upon weight, you could use some type of sensing systems internally and trigger for small changes
  15. 3 hr to build and looks great! Note, you can download instructions on RobG's Tindie page and they are quite nice! Thanks RobG
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