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  1. M

    Help, schematic!!!

        Hi! I'm am Protel 2004 newbies. May I know how do I find 1N5822 and EE-Sx1070 (Omron slotted opto sensor) footprint and schematic diagram? Thanks for your kind help. :)
  2. M

    L298n IC socket, urgent!!!

        Can I solder L298n IC directly (without IC socket) into my PCB? Will this damage my L298n IC? Thanks.  :)
  3. M

    Help, EE-SX1070 schematic sysmbol and footprint

          I am a Protel newbies and plan to draw a PCB with Protel but could not find EE-SX1070 schematic symbol and footprint from the Protel library. Can anyone tell me how do do I get this schematic symbol and footprint? Thanks. :)
  4. M

    L298n IC socket, urgent!!!

        Hi, I just bought a L298n a bipolar stepper motor I which is 15 pins IC. May I know how do I find its IC socket because I can't find this IC socket and just modify a 18 pin IC socket. It is not so good because it is easy short circuit if modify with this way. May I know has anyone has an...
  5. M

    Help, data sheet!!!

          I just get a stepper motor from my old printer and plan to use it but I do not know its connection. Does anyone has its data sheet? I guess it is a bipolar stepper motor because it has only 4 wires. My stepper motor information is as below:- QH4-4387 SMJ40-4878-A 24.12V 7.5ohm FDK
  6. M

    Help, IC!!!

          Can I use 2 phase H bridge driver (M3479-P) to drive an 4 phase bipolar stepper motor (M42SP-7)? It is because I cannot find a 4 phase H bridge drive. Do you have any idea? Thanks. :)
  7. M

    Help, IC!!!

        Can please help me to check whether I can use MC3479-P H bridge IC to drive my bipolar stepper motor which is M42SP-7? Because I really do not have an idea. Thanks you first for your kind help. :)
  8. M

    Stepper motor H bridge

        Thanks audioguru for your info. Besides this what should do I need to check for the Bipolar Stepper motor H bridge IC before I buy? Can you please give an idea and recommend some Bipolar stepper motor H bridge IC to me? Thanks.  :)
  9. M

    Stepper motor H bridge

        I just brought a stepper motor H bridge IC and plan to use use it for my 12V bipolar stepper motor. May I know is this IC can use for my 12V bipolar stepper motor? How to check from the data sheet? If it is not. What kind of H bridge IC is suitable for me because I need and IC to control the...
  10. M

    Pulse Width Modulation

      Thanks, I have read the article called Pulse Width Modulation written by By Michael Adler and Tim Surtell at http://www.eleinmec.com/article.asp?28. May I know the mean of "The motor will work perfectly well, provided that the frequency of the pulsed signal is set correctly, a suitable...
  11. M

    Simple DC motor PWN speed control

          Recently I have read a Simple DC motor PWN speed control circuit from http://www.electronics-lab.com/projects/motor_light/038/index.html. Inside the article and below the word of important, there have mention that "the drain (or collector) current must be equal to maximum motor current...
  12. M

    Help!!!

  13. M

    Help!!! Conveyor belt.

                I'm a conveyor belt newbies. I plan to construct a 60cm conveyor belt which would use to transfer a a glass of water. May I know what material do I need to use and how do I construct this conveyor belt? Can I construct this with my recycle printer? Because I really interested to...
  14. M

    Vibration!!!

  15. M

    Conveyor Belt

          Hi! Expert and non expert are welcome to give your idea on this because I really do not have an idea on the conveyor belt. Thanks.  :D
  16. M

    Vibration!!!

        I need a vibration motor but I cannot find it. May I know can I modify a DC motor or stepper motor to be a vibration motor? If it is possible, how do I modify it? Thanks.  :D
  17. M

    Conveyor Belt

        Thanks for all the elctronic experts kindly reply.  Actually I need to build a conveyor belt with a dc motor which will only work in one direction and the conveyor belt speed is optimum to avoid spill a drop and only 1 glass per time.  I plan to use PIC (a microcontroller) to stop the...
  18. M

    Conveyor Belt

  19. M

    Conveyor Belt

            Actually I need to create a conveyor belt to transfer a glass with water from one place to another place, distance is around 60cm. Is anyone has an idea to create a conveyor belt? Do you have the construction diagram? Thank you first for your kind help.  :)
  20. M

    Help!!!

      Sorry, Staigen. I'm an electronic newbies. Can any expert or non expert help me to solve my problem because I'm do not have any idea? Do you have any tutorial or good webpage to intro to me. My question is as below:- Hi! I need to use an infrared diode to calculate the number of coins drop...
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