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31  Using Arduino / Project Guidance / Okay, how do I control a PC fan with the LCD screen ie faster or slower? on: September 22, 2012, 09:10:03 pm
I have finally opened up my arduino and managed to easily get a 20x4 lcd screen working.

I would like to try to control say a PC fan or what ever, it does not matter what it is.  But I would like to be able to have a menu come up on the lcd screen that might say something along the lines of " speed 1,2,3,4 etc"
then be able to select which speed you want.

So I guess I would need a few push buttons to use as buttons to select which menu option to use etc.
But how do you program this?
Are there any similar projects that people have done and have lessons or instructions at all?

32  Using Arduino / Microcontrollers / Freetronics eleven VS Arduino Uno R3 on: July 19, 2012, 02:25:52 am
Is there any difference between the Freetronics eleven and the Arduino Uno R3. 

I think that before the Uno R3 the Freetronics eleven might have been a lot different, but now with Uno R3 I think they are similar?

Anyone know?

33  Using Arduino / Project Guidance / How do you use a LCD screen and program it for fan speed and display rpm? on: July 14, 2012, 01:39:29 am
I am putting together a shopping list for an arduino.  I would like to have an lcd screen that is some how connected to a dc fan.

How exactly do you have a screen showing  "Speed 10%" then when you press a small up button it then changes to "speed 20%" etc  then have like a enter button to select the speed.  And as soon
as you hit that enter button the fan speed will increase to what ever speed you select.

How is that done?  Is one particular brand/type of LCD better than others?
I read that serial LCD is easier to use as it only have 4 wires.

Then also if I wanted a temperature sensor to display the temp on the lcd is that hard to do.  Can you set up pages, so like show fan speed on page 1, temp on page 2, and on page 3 the motor speed adjustment selector.

34  Using Arduino / Project Guidance / Arduino SSR and fuel injector help. on: July 09, 2012, 07:59:28 pm

I am yet to have my very own Arduino but will be getting one shortly.  I would like to be able to use a standard type (what ever that may be) automotive fuel injector with the arduino.

I see that you can use a SSR-solid state relay.  Is this the general normal practice that would be in a cars electronics?  There was a thread about inductance with motors and SSR's and you need to have a resistor in there to prevent something from happening? 

Does anyone know what the requirements are of a fuel injector? Like how long can you keep it energized with 12 volts for?  Will it draw too many amps and break etc?

I assume a standard arduino would be fine for the task.  It seems like you can just send the arduino logic level signals to one side of the SSR and then have a 12v battery hooked up to the other side circuit for the injector?

35  Using Arduino / Project Guidance / Re: Wha tdo I need to control a car's heater fan blower motor? PWM? on: July 07, 2012, 03:07:23 pm
I think the motor must resonate or something and it just doesn't like the pulsing of the signal.  I then took the motor off and put on a small 5w 12volt car tail light
and it worked properly all the way form 0 volts up to my max of 12.33 volts.

Here is the kit:
36  Using Arduino / Project Guidance / Re: Wha tdo I need to control a car's heater fan blower motor? PWM? on: July 07, 2012, 07:51:36 am
Well I ended up getting a pwm motor speed controller kit in town.  Yes the motor must draw over 10 amps as it blew the 10 amp fuse in the back of the dmm.  Anyway, the motor makes the buzzing and humming noise.  But, I am not able to wind the motor up to the full 12 volts.  It will just stop at say 9 volts.  Any ideas?
37  Using Arduino / Project Guidance / Wha tdo I need to control a car's heater fan blower motor? PWM? on: July 06, 2012, 06:32:07 am
I have a 12volt dc car fan heater blower motor.  I want speed control for it.  I think I need to use PWM.

I read that PWM will make my motor have a buzzing sound.  I don't want this extra noise at all though.
And I do not know how many amps is uses or how many watts it is.

Similar units I saw on ebay (out of cars 20 years old mind you) said 300 watts 11 amps.  This fan is out of a KIA sedan, My guess maybe around 10-12 years old, but who knows I got it from a car wreckers.

So what parts will I need to drive this motor?
38  Using Arduino / Motors, Mechanics, and Power / How much weight can my 270oz-in motor lift? on: May 05, 2012, 06:50:39 pm
I have a stepper motor that is 270oz-in.
This converts to 7.65kg.

This means that it can lift 270oz or 7.65kg 1inch or 25.4mm from the center  of the motor shaft, right?

If a length of RHS steel 65x35x3mm thick weighs 4.25kg per meter.  And I want to make a robot arm out of this at 1 meter long.

Will that motor lift that 1 meter length of steel RHS that weighs 4.25kg?

39  Using Arduino / Project Guidance / Re: Arduino based point to point linear positioner? How to do it? on: May 05, 2012, 05:34:50 pm
Thanks for the reply Scotty,

I actually have a stepper driver for the stepper.  It is one of the geckodrive stepper drivers, which I currently have it set up using mach3.    I want to get away from using the laptop and mach3 simply because it is too bulky for the application.

I will look into the arduino Uno in the mean time.
40  Using Arduino / Project Guidance / Arduino based point to point linear positioner? How to do it? on: May 04, 2012, 11:45:32 pm

I would like to make a device that you could enter a distance in mm and hit the go/start button and then it will go to that position.

I think that arduino could do it, but as I have never used an arduino I have not idea where to start or what to do.  You can see the attatched diagram that is included.  
What I would like to know is.

1.  Firstly is it possible?
2.  I would need a LCD screen to see what numbers to enter etc.
3.  Need a keypad.
4.  Stepper motor or servo motor or something else?
5.  I already have a 270oz stepper, what is the max size in amps that arduino can run a stepper motor?
6.  I think I need an arduino, motor shield, linear or rotary encoder shield?
7.  What arduino do I need, there are heaps.  Arrghh, lol.
8.  Would need to set motor speed too, and I guess acceleration and decelleration.
9.  Would need to be able to zero device.
10. Would need to have a limit switch at either end of travel.  

These are just a few things I can think of that would be needed.

The idea is you punch in a distance you want the thing to move in mm, then press start/go.  Then it will move that that position.  

How do I get started doing this?  I mean all the computer code and stuff.  To make the arduino work you use a motor shield right?  Does the arduino send pulses to drive the motor shield?
How do you get a display in mm to show on the LCD screen if the motor is only turning from pulses?  I guess you some how write a program for the linear shield?

Can some one show me some links or information on how to do each of the steps need for this type of project.

Keen to try this arduino stuff out


41  Using Arduino / Project Guidance / Re: New guy here. What arduino to get to control motor speed and drection and... on: July 22, 2011, 09:22:00 pm

•4 H-Bridges: L293D chipset provides 0.6A per bridge (1.2A peak) with thermal shutdown protection, 4.5V to 36V

I don't think this is enough power  0.6A to use my current stepper.  I am just using the smaller G250X and it is 3.5A 50VDC maximum.

I want to get away from having to use the laptop/pc all plugged into the motor, and also mach3 the control software.  It will make portability much easier/better.

42  Using Arduino / Project Guidance / Re: New guy here. What arduino to get to control motor speed and drection and... on: July 22, 2011, 09:16:58 pm
Could you be more specific:
 what motor horse power? it would depends on:
 -how heavy items,
 -how far you need to push them,
 -how fast it should be done.

Good point.  Well I am now using a 270oz steppermotor running it off mach3 and a geckodrive..
Speed is slow say up to 2meters min.

43  Using Arduino / Project Guidance / New guy here. What arduino to get to control motor speed and drection and... on: July 22, 2011, 06:16:32 pm
Hi all,  I am a total noobie to arduino so I would like some
guidance on what parts to purchase to do a specific task. 
Then later on I will need to know how to do it,lol.

So I want to control a motor to push an item along a linear
rail.  I want to controll the speed (I assume acceleration as
well) and the direction of the rotation of the motor shaft. 
Then I want to have a LCD screen and an input pad so that
I can say go this distance at this speed.  And have it
displayed on the LCD screen.

The actual running speed in real time will not need to display,
just the initial setting and direction.

I do not know what motors would be best to use?  stepper, servo,
normal dc motor etc.

With all that in mind, what board do I need to get?  Man it can
be a bit confusing to the beginner, so many boards.    I see
some have PWM, which I might need I think for motor control right?

I would rather get a bigger more featured board than a simple basic
board.  This way I can do more projects etc.  But price will still
have to be considered.

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