how u all get inspiration to create a project?

mind to share what projects u all hv done b4?

I start 1st,
1) telerobot with robot arm (the look similar to bomb disposal robot)
2) AGV (same as line following robot)

"Teh Tarik" session Meaning a social gathering.

1) My inspiration mostly come from walking robot..
2) mostly microcontroller-base project. Currently working on legged robot

This post has been edited by Aurora: Oct 7 2009, 10:43 PM

bi-pedal robot? goin to develop ur own asimo?hehe

Bipedal?

Not building but Hack an Isobot using Basic Stamp2 but the Ram is limit to 2K.You can watch the video on my blog.
Not many people doing it yet. I have tried with Pic but theres some issue with the serial protocol.
If many people have same interest we can form an Isobot hackers group.
To make it walk it's a tough pain job doing it alone. For Isobot owner I have to say that to make Isobot is not as easy as you play with it.

Yokatasan any video of your robot?

I'm working on a multi-leg robot, not biped. Biped has limited room for creative motion, mainly due to stability issue. Commercialize/hobbyist unit is not up to the standard yet (at least not mine ).

i got the video but not clear n oso i'm lazy to post it in youtube

how much it cost for Isobot? where can buy it?

You can make a Robot but lazy to post the video??????

Hmmm

haha.....coz youtube nid create acc...

Sorry if this post seems like an ad, I have 2 maxim 233 on my hand. PM me for details.

Well to be honest, most of the basic electronic stuffs you're selling are more expensive than I can obtain normally.
Why don't you build the RS232 kit and sell it instead?

weuwww didnt know this thread exist
did my fyp last year developing home-brew RISC cpu using TTL.

gonna continue sometme soon..hopefully

http://forum.lowyat.net/index.php?showtopic=1203190

hey guy check it out......wireless controller via parallel port

hi, i'm a mechanical student n doin final year project.
due to the lack of electronic background, my supervisor allow me to ask ppl 2 build or buy the electronic circuit.

my project is an x,y,z axis linear movement pick n place.
i will be using stepper motor n i need a driver to control it.
may i noe izzit jalan pasar got ppl help me build n design circuit board for me?
or other eletronic expert willing to help me?

tq

I've never heard anyone selling a CNC controller being sold at Jln Pasar (Btw, linear movement pick n place should be similar to the CNC system, just different actuator). If there were someone selling, that would be OWESOME ...!!!
But there are multiple sites selling CNC controllers. Unfortunately they are not in located in Malaysia. Depending on your budget, I think it might be kinda affordable. MAYBE. I'll reopen my old links and update soon.

[UPDATE]
It seems there are a lot of sites selling DIY CNC machine parts now. Just search for it. Maybe there are someone selling or being the distributor of the controller in Malaysia. Who knows. Btw this is the old link that I was talking about: http://buildyourcnc.com. There was a guy in Malaysia building it and he has a blog up (I think...) but I don't remember and can't find it. Well its up to you though on how you're going to proceed.

This post has been edited by elm383: Oct 27 2009, 12:30 PM

Jalan Pasar sell items only, never heard of them provide any design service.
What's your budget and timeline?
A motor driver is kinda vague. We need to know the input and output. What about motor power ratings?
And no mentioned of controlling software, I assume that's outside of this job scope.
I think this is right up Aurora's alley. PM him and see if he's interested.

sry for not putting the clear description about my project.
i really stupid come 2 electronic, that'y i choose mechanical XD

elm383:
yah, i copied the concept of CNC into my project. i wanted 2 buy the driver, but most of them is oversea so the price will be expensive. Since most of them is applicable for powerful stepper motor. Mine is little project only.
my supervisor advised us that the best will be order within malaysia or ask expert 2 help wor.

tgrr:
i heard from my friends that some shop in jalan pasar got help ppl 2 build circuit after noted down our needs. We just explained wat we want n them will settle the board for us. We just need 2 pay only.
My budget for driver depends on all in 1 or modular lo. The best not exceed rm300-400.
for ur info, i will controlling using vb.net by sending pwm signal.
since vb.net got more simple language n interfacing (GUI) for newbie like me 2 use. The motor will be >5v (cytron) depending on budget also.

i founded a website http://pminmo.com/ that got free source circuit. Now i wondering either Tachus42 3 Aixs Board (all in 1) suitable for me?

tq for the help.

This post has been edited by Devilhpk: Oct 27 2009, 01:17 PM

Can't tell without seeing your motor specification if it matches with the 3axis board. I don't want to assume all stepper motor works the same way.

Why would you need PWM?
The 3axis board input signal comes from parallel port. You have the right code/software to output PWM through parallel port?
See here on the basics of driving stepper motors->Stepper motors drivers

5v is just the voltage. The motor draws how much current? You do have a power supply that is sufficient enough to drive all your motors right?

tgrrr:
i will consider mainly unipolar stepper motor since many people say it more easy 2 control. In other hand, i noe bipolar got better holding torque which is important for my z-axis (a bit heavy).

from my research, I need 2 use PWM signal rather that input signal from parallel port becoz i need 2 hold some position like (z-axis) when picking items. If use input signal from parallel port, izzit it only for on n off mechanism? it will slide down, i guesss.
correct me if i'm wrong.

hope 2 heard ur advice again.

For CNC-base design, have you already figure out the mechanism to transfer the rotation motion to linear motion? CNC machine normally use wormgear and rack, has high torque output, but at the expense of low speed. And depends on your load, you maybe able to use Tachus42 3 Axis Board, with some modification on the IC to suit your motor.

pminmo has several link to free software. These software has already pre-scripted communicate protocol with the board via parallel port. If you want to write your own program, maybe you need to get it from the author how the protocol works, or maybe reverse engineer yourself.

We (myself and tgrrr) are actually looking for small project for pasttime and some side income. Depends on your requirement, urgency, and to what extend, we could help you, at a reasonable price.

That's what I don't get. PWM is a series of pulse sent at a fixed frequency. What's being changed is the duty cycle of the pulse.
This is what I used to control my servos long time ago.
Stepper motor on the other hand runs on steps. Give it the right signal, it should take one step forward or backward. If you don't change the signal, it should hold still and not move. As long as power is applied, it shouldn't move.

Perhaps what you're talking in regards to PWM is there's another controller board that translate the PWM signal to the necessary driving signals. In this case, it'll will be more complex than the 3axis board, and I think may not be necessary for you.

I think we should get your project outline straight. Since this is your fyp, which area is your actual focus, and which area is allowed by your lecturer to be outsourced? Then we can suggest the best method for you to move forward.

Since I'm in Penang, i can only assist in giving suggestions so if you're looking for more hands-on assistance, Aurora is your best choice. I think based on your budget, you can only do handmade board or simply go for stripboard. If you're really interested in our service, we should discuss further in PMs or personal emails only.