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tonyp12
03-16-2012, 11:43 PM
http://i3.ytimg.com/vi/2en2LjhYTso/default.jpg
http://www.youtube.com/watch?v=2en2LjhYTso
Four TI drv8833 dual h-bridges.
single four channel ADC.

$45+$5 shipping.
https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=WKRNGWPQ6LYP6
Only 10 boards availabe as of now, limit one per person.

I will contact you to see what options you want for shunt resistor values as to limit current from 200mA to 1.5Amp
And if your want the spox molex attached.
I use 2.5mm pitch molex connectors and will supply male(for board) and female headers w/ crimps

http://www.mouser.com/Interconnects/Rectangular-Connectors/Headers-Wire-Housings/_/N-7auntZscv7?P=1z0wxp7Z1z0wxp8Z1z0wxfy&Keyword=SPOX&FS=True
http://www.mouser.com/ProductDetail/Molex/08-70-0056/?qs=sGAEpiMZZMvvAo%252bip5liN7XMjMCx6cyr

Any other 2.5mm will work like the 3.5" floppydrive power connectors etc
I will create a full spin driver, but meanwhile you may have to use what is out there or make your own.

P.S Add a 17seg LED driver board for the PPDB for an extra $18..

StefanL38
03-17-2012, 03:33 PM
instead of a youtoube video I would prefer hi-res pictures and text with technical data
best regards Stefan

tonyp12
03-17-2012, 03:45 PM
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)

turbosupra
03-19-2012, 07:40 PM
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
03-19-2012, 07:45 PM
>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
03-20-2012, 04:08 AM
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.




>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
03-20-2012, 04:17 AM
turbosupra

How many wires are going to this device?

Bruce

turbosupra
03-20-2012, 01:55 PM
Just two :)

idbruce
03-20-2012, 02:24 PM
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
03-20-2012, 02:56 PM
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%252bnu0ZaC iOEeQ%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
03-20-2012, 06:43 PM
@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