Now Available QuadStepper board for QuickStart

Comments

• StefanL38 Posts: 2,292

  2012-03-17 08:33 edited 2012-03-17 08:33

  instead of a youtoube video I would prefer hi-res pictures and text with technical data
  best regards Stefan
• tonyp12 Posts: 1,951

  2012-03-17 08:45 edited 2012-03-17 08:45

  http://www.ti.com/product/drv8833
  Dual-H-Bridge Current-Control Motor Driver
  – Capable of Driving Two DC Motors or One Stepper Motor
  – Low MOSFET On-Resistance:HS + LS 360 mΩ
  • Output Current 1.5-A RMS, 2-A Peak per H-Bridge
  • Outputs Can Be Paralleled for 3-A RMS,4-A Peak
  • Wide Power Supply Voltage Range:2.7 V – 10.8 V
  
  http://www.ti.com/product/ads1015
  ADS1015 - 12-Bit ADC
  • WIDE SUPPLY RANGE: 2.0V to 5.5V
  • PROGRAMMABLE DATA RATE: transferred via an I2C-compatible serial interface; four 128SPS to 3.3kSPS
  • INTERNAL OSCILLATOR • INTERNAL PGA up to 3300 samples per second (SPS)
  • FOUR SINGLE-ENDED OR TWO ±256mV, PROGRAMMABLE COMPARATOR differential or four single-ended inputs.
  
  Uses 4 Prop pins per Stepper = 16pins, can be wired to use with other Prop boards and not just used with QuickStart.
  Can be mounted on either side of a QuickStart board. Leaves p0-p7 unconnected for other uses.
  QuickStart board is powered from QuadStepper through a 6.8uH 1A power inductor.(anti-noise measure on the power supply)

  

  

  QuadStepper.jpg

  846 x 561 - 120K

  spin

  spin

  QuadStepper_Demo.spin

  7K

  QuadStepper.jpg 119.7K

  QuadStepper_Demo.spin 6.8K
• turbosupra Posts: 1,088

  2012-03-19 12:40 edited 2012-03-19 12:40

  My solenoid is a 1.5A device that receives variable pulse width 10v square waves depending on feedback from a hall effect sensor. I have not vetted how I'm going to do this yet, but I wasn't expecting to need anything more than a single pin to drive it (driving a FET transistor)? With the logic/control being done by the prop and maybe a couple of pins for monitoring the closed loop feedback?
  
  Are 16 pins really needed for this?
• tonyp12 Posts: 1,951

  2012-03-19 12:45 edited 2012-03-19 12:45

  >My solenoid is a 1.5A device
  Do you have a manufacture number for this device?
  
  Yes you could get by with one prop pin and you don't need my octal (8) motor driver board.
  You don't even need bi-directional as solenoids uses a spring to return.
• turbosupra Posts: 1,088

  2012-03-19 21:08 edited 2012-03-19 21:08

  Hi Tony,
  
  I have a part number, it will be a denso part number though 15330-22020. There is also B110121113A stamped on it, it is scratched through the B11 portion, so I'm not 100% on those 2 numbers.
  
  You are correct, it does use a return spring.
  
  
  

  tonyp12 wrote: »

  >My solenoid is a 1.5A device
  Do you have a manufacture number for this device?
  
  Yes you could get by with one prop pin and you don't need my octal (8) motor driver board.
  You don't even need bi-directional as solenoids uses a spring to return.
• idbruce Posts: 6,197

  2012-03-19 21:17 edited 2012-03-19 21:17

  turbosupra
  
  How many wires are going to this device?
  
  Bruce
• turbosupra Posts: 1,088

  2012-03-20 06:55 edited 2012-03-20 06:55

  Just two
• idbruce Posts: 6,197

  2012-03-20 07:24 edited 2012-03-20 07:24

  turbosupra
  
  Refering to the question you asked in my thread:
  

  How well do you think this would work with an automotive stepper motor solenoid?

  
  Stepper motors have a minimum of four wires, so this device of yours is definitely not a stepper motor, considering it has only two wires. I presume, one is positive and one is negative for solenoid operation. Irregardless, solenoids can be operated with PWM modulation, so perhaps some software similar to mine in the other thread might work well for you. Presumably you are seeking PWM modulation, in which case you should seek out spin code that uses NCO counters.
  
  Bruce
• tonyp12 Posts: 1,951

  2012-03-20 07:56 edited 2012-03-20 07:56

  Something like this?
  http://www.newcelica.org/forums/showpost.php?p=5384353&postcount=31
  
  This mosfet could do it directly from a prop pin:
  http://www.mouser.com/ProductDetail/Vishay-Siliconix/IRLU110PBF/?qs=sGAEpiMZZMsrr1kXJis%252bJ3Itlops2t7%252bnu0ZaCiOEeQ%3d
  
  Any other mosfets that also have a VGS graph that shows that at 3.1Volt it outputs at least 50% of rated max current or 2amps in your case.
  
  As you have two wires, put the n-channel mosfet on the return ground wire.
  In automotive you sometimes don't have a ground wire as the chassis is ground and you would need to use high side drive.
• turbosupra Posts: 1,088

  2012-03-20 11:43 edited 2012-03-20 11:43

  @tony, That is definitely it and thank you, that is what I will try and do.
  
  @Bruce, thanks for the term correction, I didn't realize I was using the wrong terminology