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Recent content by elmahboule

  1. elmahboule

    Need to know IC name

    Hello all I have damaged IC in the screen board of ete video intercom system type T-708c. please, I want know its name. See attached image.
  2. elmahboule

    How to 9VAC secondary in a transformer (now I have 17VAC)

    Re: Transformer Problem OK karesz thank you I will try to
  3. elmahboule

    How to 9VAC secondary in a transformer (now I have 17VAC)

    Re: Transformer Problem I can not reduce the winding. is difficult
  4. elmahboule

    How to 9VAC secondary in a transformer (now I have 17VAC)

    have a transformer: primary and secondary 220VAC 17VAC But I need 9VAC secondary (outlet) So how Help me please
  5. elmahboule

    reverse the sign of the direct current

    yes " keith1200rs " R1 = R2 thank you, But I do not know the picture of integrated circuit So can you give me the picture of this integrated circuit. " am_op "
  6. elmahboule

    reverse the sign of the direct current

    thank you " karesz " Now I understand I must use the am_op as this
  7. elmahboule

    reverse the sign of the direct current

    see my freind the drive speed has only 1 inbut of direction, if the value is +1VDC we have a direction, if it is -1VDC we get the second direction. I have 2 Potentiometers, the value of output of the first Potentiometer is OK " +1VDC " And I have also the value of the second Potentiometer is...
  8. elmahboule

    reverse the sign of the direct current

    thank you my Friend "keith1200rs" I have a +1VDC voltage, so from the this tension, I want the -1VDC, to change the direction of rotation of a drive speed. So I want to reverse the voltage from +1VDC to -1VDC
  9. elmahboule

    reverse the sign of the direct current

    hello I want to reverse the sign of the direct current I want to reverse +1 VDC to -1Vdc Help me please
  10. elmahboule

    STEP 7 in 7 Steps - A Practical Guide to Implementing S7-300/S7-400 Logic Controllers

    step 7 in 7 steps +download other link **broken link removed**
  11. elmahboule

    Automating with Step 7 in LAD and FBD: Programmable Controll

    step7 book take my friend **broken link removed**
  12. elmahboule

    STEP 7 in 7 Steps - A Practical Guide to Implementing S7-300/S7-400 Logic Controllers

    step 7 in 7 steps download I will give a best book of step 7 ( step 7 in 7 steps ) it is 4 parts https://www.zshare.net/download/56355369042ee1bf/ https://www.zshare.net/download/56357436b4a69f75/...
  13. elmahboule

    Automating with Step 7 in LAD and FBD: Programmable Controll

    simatic book Hello if anyone has these books in english please upload it. Many thanks. Automating with STEP 7 in LAD and FBD Hans Berger And STEP 7 IN 7 STEPS Clarence T. Jones take my friend https://www.zshare.net/download/56355369042ee1bf/...
  14. elmahboule

    Looking for the newest version of Schemaplic software

    Hi I need the last version of software "schemaplic" thanks +++++
  15. elmahboule

    BLDC motor speed calculation

    calculation of motor speed OK.....If you have 125Hz on one hall sensor and a 4 pole motor, your result seems correct.
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