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Everything posted by kenemon

  1. Hi All, Thought that I would share a TI motor driver PCB breakout, inspired by GW. It is made for the DRV8833 dual H-bridge stepper/dual brushed PWM controlled IC. Using the PowerPad heatsink technology, this baby should handle the larger gearhead motors (it worked for my solar tracker). It is rated at 2A. I used the msp430g2231 for PWM control. I also made the bottom a huge heatsink if you can see through the purple haze. Subliminally, I cant decide if I am a bigger NW or U of I fan (being a CU alum??). http://www.ti.com/product/drv8833
  2. I was kind of stuck in a thinking rut regarding TI's power pad technology. It was my intent to provide ventilation, or in the case of power pads, freedom to solder the bottom without using a toaster oven. I think it will help cool it down, but not as much as a copper heatsink would... Update: The hole works nice for tape during reflow action
  3. Has anyone had any luck getting the modules to communicate with anything? Hey Rob- I was wondering if you could share that hello code you got working with yours? Did you use the LP to program it or as a UART interface? I am getting geared up to get into it, as solar projects lose their charm this time of the year in Chicago...... :mrgreen:
  4. thats a Nordic RF transceiver, good range for a mouse :cry:
  5. Very cool GW, You have tied the idea together elegantly. Having once been an indoor gardener, I remember the condensation and corrosion often were an consideration. Is it possible to mount the humidistat at the end of a wire? KB
  6. What kind of range can you expect from the cc2500? Is it better than bluetooth?
  7. Thanks to all of your recommendations, I have a basic pulse/timer code set up, but i am having trouble with the timing and sequence. Both steppers I have have four wires. I am a little confused at this point. I have a motor driver which can handle a two coil stepper using 4 input pulses, and i have permuted the wiring several times. Edit: I fiddled about some more and was able to get them to rotate, using 10mS delays between toggling each pin on and off, i can speed it up by lowering the delay time as well. #include // parts copied from gwdeveloper's motor control code- Than
  8. thanks Zeke, I was thinking on using flux, but that sounds more rational.
  9. Sorry to interject, but can PIR detectors be used in this way by scanning at different sensitivities? Ie. by cycling the gain low to high and then computation from several locations could triangulation be achieved?
  10. there is a "mechanic's" solder on dealextreme for less than $5 delivered, it works great for SMT and other tiny apps, but also for larger stuff. I have tried it in the toaster oven and with the iron with great results. Just ordered a second bottle, as the first dried up after about 6 months ( in the fridge, triple wrapped..)
  11. This would be incredible to use with the LSR wireless modules. They could be networked as wireless nodes to set up a perimeter of nodes. A great alarm for warning of curious bears before they get to the campsite....
  12. Can anyone point me at some stepper motor control explanation or code? I remember seeing it, but I cant seem to find it. ThanksIA
  13. Thanks GW, Yes. That solidifies a couple of things I have been pondering. I am working on a bit bang type code to see if i can pull it off that way. Much appreciated. KB
  14. Hi GW, I started messing around and got my motor driver to work using an adaptation of your code. I am trying to get 4 channels to deliver PWM output. Using your code, i have 2 channels working fine, but i needed to hook them up to P1.2 and P2.2 to get the desired signals. I have 2 questions please: 1) do i understand correctly that to use the PwM function of the MSP it will occupy three pins each, for example P1&2 BITS 0,1, and 2) PWM can not be controlled via "P1OUT BIT2"? Can you assign timer to multiple pins to deliver the same timer pulse to each. I have been trying to under
  15. Thanks for all the help Zeke. They turned out beautiful....
  16. Thanks GW, What do you think of the TI DRV8833? I realize it needs a couple of components to work, but it is really cheap... By the way, thanks for sharing that code. I was stumbling around trying to figure out a way to make it work for me, and this will handle the PWM part as well as the "mode" switches. I have some success with your suggestions for the ADC component as well. They should work perfectly together for me. KB
  17. Hey GW, Why did you pick that motor driver for the project? I am trying to get the same kind of thing working, using LP provided PWM signals to motor driver. thanks. KB
  18. Hi Zeke, thats the idea with that last PCB you helped me with. Use wireless 802.11 anywhere you can get it to communicate with a server for data logging, or control application. I dont think it is going to be easy! Incredibly cool concept. KB
  19. Thanks Blue, Using a DirectTV antennae azimuth mount as a base, i was able to dissect it and add some bearings. The horizontal mount uses some aluminum disks which i had to cut in 1/2" milling stock with a 6" hole saw (scary!) on a drill press. Using lazy susan bearing there. The gears and belt were commercially available. Cost so far (less solar panel) about $75. Struggling now with the code for the sensor using MSP w/ PWM output to control TI motor drivers. KB
  20. Some Progress: (not currently tracking ) next: adding limit switches
  21. Hi GW, i had a moment to get back to this ADC issue. I tried putting those items you mentioned in my code but it hasnt seemed to help. I am still getting erratic readings from the ADC without any basis. Can you find any issues with this code? /* LED as Photo-Sensor2 / KB, interpreted from others who know what the hell they are doing / Sept 15, 2011 */ #include "msp430g2452.h" // Change the header to "msp430x20x2.h" if you're using the default MCU bundled with the LaunchPad. #define LED_SENSEL INCH_0 // Left sensor #define LED_SENSER INCH_1 // Right sensor #define LED_IN
  22. How hard would it be to use smartie with it? It would be a great sized sensor monitor, even wireless
  23. Sorry Rob, not trying to be a smart$%&....
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