Comments for GRAIG http://graigroup.wordpress.com Robotics and Automation Initiative Group Thu, 17 Sep 2009 16:48:46 +0000 http://wordpress.com/ hourly 1 Comment on Stepper Motor Driver Ckt by farhad http://graigroup.wordpress.com/2008/04/01/stepper-motor-driver-ckt/#comment-85 farhad Thu, 17 Sep 2009 16:48:46 +0000 http://graigroup.wordpress.com/?p=63#comment-85 hi imade one cnc router but i problem with driver for it please help me for pcb and shematic i want contact 3 motor steper with serial port pc please help me thankyou hi
imade one cnc router but i problem with driver for it
please help me for pcb and shematic
i want contact 3 motor steper with serial port pc
please help me
thankyou

]]> Comment on Stepper motor driver using ULN2803 by microcontroller http://graigroup.wordpress.com/2008/04/27/stepper-motor-driver-using-uln2803/#comment-79 microcontroller Mon, 30 Mar 2009 17:11:37 +0000 http://graigroup.wordpress.com/?p=112#comment-79 I have searched about the word "stepper motor" and you blog appeared to me. where can I read about stepper motor in details in your blog?! I have searched about the word “stepper motor” and you blog appeared to me.
where can I read about stepper motor in details in your blog?!

]]> Comment on Stepper motor driver using ULN2803 by M.Gopala Krishna http://graigroup.wordpress.com/2008/04/27/stepper-motor-driver-using-uln2803/#comment-78 M.Gopala Krishna Mon, 30 Mar 2009 09:18:11 +0000 http://graigroup.wordpress.com/?p=112#comment-78 Good article... It is better if you provide the internal operation of stepper motor also Good article… It is better if you provide the internal operation of stepper motor also

]]> Comment on Stepper motor driver using ULN2803 by noim http://graigroup.wordpress.com/2008/04/27/stepper-motor-driver-using-uln2803/#comment-77 noim Sat, 07 Mar 2009 06:07:56 +0000 http://graigroup.wordpress.com/?p=112#comment-77 hi, i need a PDF about stepper motor control by using ATmega32l microcontroller . Where uln2308 is motor diver is used. would u like to send me tht pdf file please. and i need some data sheet about stepper motor also. hi,
i need a PDF about stepper motor control by using ATmega32l microcontroller . Where uln2308 is motor diver is used. would u like to send me tht pdf file please. and i need some data sheet about stepper motor also.

]]> Comment on ADC in AVR by Tom http://graigroup.wordpress.com/2008/02/28/adc-in-avr/#comment-62 Tom Thu, 13 Nov 2008 15:40:30 +0000 http://graigroup.wordpress.com/?p=8#comment-62 Thanks, you code managed to solve my problem which i had been working on for ages Thanks, you code managed to solve my problem which i had been working on for ages

]]> Comment on Stepper motor driver using ULN2803 by pritamamd http://graigroup.wordpress.com/2008/04/27/stepper-motor-driver-using-uln2803/#comment-59 pritamamd Sat, 16 Aug 2008 15:03:47 +0000 http://graigroup.wordpress.com/?p=112#comment-59 HI... VISIT datasheet4u.com.... U WILL GET ALL THE DATASHEETS THERE!!! HI…
VISIT datasheet4u.com….
U WILL GET ALL THE DATASHEETS THERE!!!

]]> Comment on Workshops by Akshay http://graigroup.wordpress.com/workshops/#comment-58 Akshay Mon, 11 Aug 2008 07:10:23 +0000 http://graigroup.wordpress.com/workshops/#comment-58 i want to join u i want to join u

]]> Comment on Stepper motor driver using ULN2803 by savita http://graigroup.wordpress.com/2008/04/27/stepper-motor-driver-using-uln2803/#comment-57 savita Sat, 02 Aug 2008 11:39:03 +0000 http://graigroup.wordpress.com/?p=112#comment-57 hi, we want datasheet of ULN2003 and ULN2803. please replay. hi,
we want datasheet of ULN2003 and ULN2803. please replay.

]]> Comment on Stepper motor driver using ULN2803 by Binu http://graigroup.wordpress.com/2008/04/27/stepper-motor-driver-using-uln2803/#comment-56 Binu Wed, 30 Jul 2008 08:48:12 +0000 http://graigroup.wordpress.com/?p=112#comment-56 Nice article for motor control. Nice article for motor control.

]]> Comment on Forums by Aditya http://graigroup.wordpress.com/discussion-forum/#comment-55 Aditya Tue, 29 Jul 2008 19:17:17 +0000 http://graigroup.wordpress.com/discussion-forum/#comment-55 hi nitish. i think you want to ask about the IR sensors, so i will try to explain the working here the transmitter (IR Tx) is connected in forward bias. hence i keeps on emitting IR radiations. the receivers (IR Rx) are connected in reverse bias. hence when no IR is present we get 5V across the sensors and 0 V across the resistance (ideally). when ir falls on the receivers the conduct and hence the 5 V drops to a lower value (say by 1V). now this remaining 1V appears across the resistance and we get this voltage across the resistance as the output. please refer to the circuit here... http://graigroup.files.wordpress.com/2008/04/sensors2.pdf hi nitish.
i think you want to ask about the IR sensors, so i will try to explain the working here

the transmitter (IR Tx) is connected in forward bias. hence i keeps on emitting IR radiations. the receivers (IR Rx) are connected in reverse bias. hence when no IR is present we get 5V across the sensors and 0 V across the resistance (ideally).
when ir falls on the receivers the conduct and hence the 5 V drops to a lower value (say by 1V). now this remaining 1V appears across the resistance and we get this voltage across the resistance as the output.

please refer to the circuit here…

http://graigroup.files.wordpress.com/2008/04/sensors2.pdf

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