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Req. a donation: Project for school exhibition
Posted: Wed Jul 27, 2011 11:52 pm
by Shenal
[media]http://www.youtube.com/watch?v=uI5L42-Z ... r_embedded[/media]
I'm an A/L student of St.Benedict's college Colombo-13,my self and my friend Praveen Alexis(Member of ROBOT.LK) trying to build a drawing machine just like the above video.But not that much advance.we are trying to build this using old broken printers.we build this for an exhibition in my school in September.But we couldn't complete this project because we are not in a position to get necessary micro controllers ,Programmers etc.Therefore your support to get those equipments, will be a great encouragement to achieve our goal.
Thank You,
Your sincerely,
Shenal Dabare.
Re: Req. a donation: Project for school exhibition
Posted: Wed Jul 27, 2011 11:56 pm
by Shenal
Re: Req. a donation: Project for school exhibition
Posted: Thu Jul 28, 2011 12:05 am
by Shenal
Required items-pic 16F877A
JDM Programmer
ULN2003 IC
MAX232 IC
3 Servo Motors
Serial Cable
Re: Req. a donation: Project for school exhibition
Posted: Thu Jul 28, 2011 12:09 am
by Shenal
The letter from our Principal.
Re: Req. a donation: Project for school exhibition
Posted: Thu Jul 28, 2011 12:11 am
by Shenal
Re: Req. a donation: Project for school exhibition
Posted: Thu Jul 28, 2011 6:00 am
by PraveenAlexis
Re: Req. a donation: Project for school exhibition
Posted: Thu Jul 28, 2011 11:56 am
by Neo
I know both Shenal and Praveen since they became members of ROBOT.LK and I personally think this will greatly benefit to improve their personal skills.
I'm going to evaluate what is required. According to what I see you need both Micro and Programmer from us. Can you please confirm that?
Servo Vs. Stepper
I personally think Servos are not going to fit on this. Precision positioning is possible with servos but with some knowledge in PID controllers and PWM. Use stepper motors instead which you can control the x, y, z (Pen) positions with enough accuracy. Steppers are easy to handle even for novice. What you find inside printers are steppers. The IC you have chosen to drive the motor (ULN2003 7-bit 50V 500mA TTL-input NPN Darlington driver) is commonly used to drive steppers. So I guess you have just mistaken the word?
Our esteemed ROBOT.LK team member Gayan (Codename Face) also wanted to participate on this. So I'll leave provision for them as well
Re: Req. a donation: Project for school exhibition
Posted: Thu Jul 28, 2011 12:10 pm
by Saman
ULS2003 is very good to control stepper motors. Have a look at following two tutorials added by Regi long time ago.
Connecting Stepper Motors to Microcontrollers Tutorial
Connecting DC Motor to Microcontroller Tutorial
Re: Req. a donation: Project for school exhibition
Posted: Thu Jul 28, 2011 12:37 pm
by Neo
Letters are in order. I'm heading towards to the approval of funds. I have only put the micro and programmer on the list as per our previous discussion. Do you need the rest of the components as well (ULN and MAX) ?
Neo
Re: Req. a donation: Project for school exhibition
Posted: Thu Jul 28, 2011 12:51 pm
by Face
@ Neo & others.
I will try to help them as much as I can.You know that I am not a Rich fellow
But I will try to help them From my salary
@praveen & shenal
(Don't think I am getting 100 000 for my salary
he he I am getting smaller salary think you dont need any info about my salray & job
).Try & try.wish you luck.
