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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by losT

  1. L

    Need help in zero crossing detector

    I have a project which need me to design a zero-crossing detector. Therefore I need to know wat a zero-crossing detector is. is the picture a zero-crossing detector???? My input is a noisy ac voltage and output a digital 5V pulse.
  2. L

    Need help in zero crossing detector

    Hi, can someone tell me wat is a zero crossing detector? wat does a simple zero crossing detector consists of??? do anyone have any schematic that can give me??? Sorry for asking so many qns but really need help here. thks. Regards.
  3. L

    Positioning of 12 LEDs to get 60°

    Hi, I need to get a angle of 60° from 12 leds. Each led I have with me is only 40°. Therefore is there anyone who know how to position or how to place my 12 leds so that I could get a minimum of 60°. Thanks.
  4. L

    Need help in protel

    Hi, anyone know how to use protel??? I need to use protel to simulate a 240Vac to a dc voltage. Can anyone help??? Thks.
  5. L

    Help needed in designing a 240Vac to 48Vdc circuit

    Thanks alot. :D
  6. L

    Help needed in designing a 240Vac to 48Vdc circuit

    Hi, thks for replying. I dun have a transformer. All I need is to design using protel dxp to convert a 240Vac to 48Vdc. I need 48Vdc because I need to drive up to approximate 10 leds. Each led takes abt 4V. Can you teach me how to design the ac to dc converter??? Thks.
  7. L

    Help needed in designing a 240Vac to 48Vdc circuit

    Hi, I really need some help here. Can anyone who know how to convert a 240Vac to 48Vdc teach me how to do it? It will be great if there is schematic. Pls help. Thks.
  8. L

    Help needed in building a white LED cicuitry

    Hi, I need some help in building the above circuit. The major problem is I couldn't find a white LED which is at least 40 cd and 60°C in angle. Therefore I need to use array of LEDs. How do I connect the array of LEDs with a switch which can control the light intensity?? I will be good if...
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