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<zmatt>
outrageous: it uses a bidirectional gpio
<zmatt>
looks like you send a 5us positive pulse to trigger and then measure the width of the response pulse, where 29us = 5mm
<zmatt>
on a beaglebone I'd probably use PRU and/or an eCAP peripheral for that to ensure reliable measurement, and possibly separate input and output pins (with a series resistor on the output and then tied together)
<zmatt>
using plain gpio on linux is likely to get inaccurate results
<lucascastro>
set_: have you made the motor work ?
<set_>
Sheesh.
<set_>
No.
<set_>
I have not made the motor work.
<set_>
I gave in.
<set_>
I took a break.
<set_>
lucascastro: No, I gave in and broke. I think I remember our conversation though.
<set_>
MOSFET or a simpler FET.
<set_>
I really lost it over that ordeal.
<set_>
I went back to 32-bit mcu programming machines and had to make gifts for Christmas.
* vagrantc
blinks at all the activity in here
* set_
says a little elf goes a long way!
<set_>
@zmatt: You started it. Happy New Year by the way.
<lucascastro>
set_: if i can recall, you told about mosfet, but you alread had an op-amp.
<set_>
Right. But the op-amp and controller/motor driver did not function well together.
<set_>
^ lucascastro
<lucascastro>
I can't understand that. op-amp it was just to isolate the set the right Voltage output.
<set_>
For the life of me, I could not decipher why it did not work. 5v logic most likely and so on (no level translation).
<set_>
Okay. I still could not get it to do it.
<lucascastro>
ok fine.
<set_>
Sorry but I moved on with failure in mind. I will reattempt it. Do not worry.
<set_>
I did start to get the wiring back on the countertops.
<lucascastro>
It was just to be aware.
<set_>
So, that is one way (a reminder of sorts).
<set_>
Aw.
<set_>
And yes sir.
<set_>
I am full of mistakes (as you can tell).
<set_>
I got the level translator out too.
<set_>
Oono is the brand for the BeagleY-AI.
<set_>
3.3v to 5v logic for the driver in question but... I think you are right.
<set_>
i should just stick with the switches.
<set_>
MOSFET types of switches may be easier on me... I am not sure just yet. BBL or will I? New years and not halloween. See, another mistake.
* set_
pretends Halloween is scary and nifty too.
<set_>
reality...blah.
<set_>
Done!
<lucascastro>
I'm not really good with celebration dates.
<set_>
ha. Me neither. Done.
<set_>
So, without using a schematic and diagram, how would you say I should connect and what connections should be made on the BeagleY-AI?
<set_>
GPIO translated to 5v logic to circuit and then on from that point forward?
<lucascastro>
set_: about what?
<set_>
Motor Movement/Stepper in general
<lucascastro>
I really think you can make a try without bbb, just set the circuit with mosfet/ap-omp and and check the result.
<set_>
Okay.
<set_>
Well, see you later.
<lucascastro>
you can set amp-op to drive a bjt
<lucascastro>
because the motor required so current
<lucascastro>
fine.
<lucascastro>
I have some step motors, I make a circuit to check.
<set_>
No.
<set_>
Please do not.
<set_>
I am having difficulty with understanding the workflow of some circuits to driver. If I do not need the driver, no issue.
<set_>
But then the circuit is complicated to me for many reasons.
<lucascastro>
what is the driver are you using?
<lucascastro>
I can't remember
<set_>
Breadboards are lacking in function, size, and space all together. I have some preforated prototype boards for testing but I have not made it that far.
<set_>
DM332T
<set_>
It takes 5v or around that logic on every pin plus the amperage is high for initiating logic to the driver.
<set_>
I was misinformed and learned along the way with these drivers.
<lucascastro>
Looks really good driver.
<lucascastro>
It already implement the isolation I was talking about
<set_>
So far, I got other drivers to work. These are highly inexpensive and give me trouble for some reason.
<set_>
Right!
<lucascastro>
using mosfet
<set_>
Oh.
<lucascastro>
The drives has internal photon transistor
<set_>
So, at 4.5v, it switches on and then I can control it...
<set_>
Oh.
<set_>
Okay.
<set_>
leds and light!
<lucascastro>
so you just need to turn on the photon transistor. It's not that good with FEt
<set_>
Oh.
<lucascastro>
you can use a resistor.
<set_>
Okay.
<lucascastro>
Somehow you need provide 5V but require a resistor to ensure the current
<set_>
I saw that...
<set_>
So, voltage divider or some other circuit...
<set_>
I am just not sure of the routing. I think my old circuit was bogus and thus could not do anything movement wise with the stepper.
<set_>
I have two resistors. One end went to GND while, the other to a pin on the driver (DM332T), and then to the controller.
<set_>
So, two resistors and three ends.
<set_>
I got excessive heat on the motor(s).
<set_>
Too hot.
<set_>
Then, I cooled the motor down but I could hear a buzz after arranging the wiring differently.
<set_>
Then, no buzz and no heat.
<set_>
But, it was excited.
<set_>
I could not move the motor.
<set_>
No budging by hand nor by sys.
<set_>
And yes, I saw where the current resistors were put in place with 12v and 24v supplies.
<set_>
They are needed...
<lucascastro>
Not exactly. there's a isolation using the photon resistor.
<lucascastro>
So you need just 5V to turn on the photon-transistor
<set_>
Right, that is called OPTO.
<set_>
OPTO handles the enablement of the driver for the inner circuitry to act on command.
<set_>
at 4.5v or more but not more than some odd voltage I will not be using...
<set_>
At least, not now. I will stick with 5v.
<set_>
okay.
<set_>
I got a 12v to 5v translator...
<set_>
I think this may work. I was using the 5v from another source.
<set_>
Aw, that was the mistake. I never made it that far in translation. I needed 12v to supply PWR/GND, 12v to 5v translator to OPTO, and then resistors on the rest of the DIR/STEP headers.
<set_>
Blah.
<set_>
When I type it out, it seems simple. I will try it!
<lucascastro>
But it's simple.
<lucascastro>
You get done.
<lucascastro>
you'll get done
<set_>
For now, yes...
<set_>
But I can build more stuff!
<set_>
This has put a damper in my building of things.
<set_>
Would I make this circuit available? (12v to 5v)/GND to (12v and GND)/GND. So, would I put two GND wires in the main supply GND, i.e. one from 12v and GND and one from 5v and GND?
<set_>
I have no way to supply GND to any other location...
<lucascastro>
the 12v and 5v cant share the same GND?