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Recent content by logicon

  1. logicon

    Voltage divider circuit to measure 440v AC supply using ATMEGA8

    If you are working with phase angle, don't forget to invert the secondary waveform if you use a transformer. Hope this help.
  2. logicon

    Please let me know your idea about this circuit

    Yeah. I think Vbase has the correct circuit for your intentions. I think you may be trying to build a magnetostriction circuit. You can tell from the reconfigure circuit if you try it.
  3. logicon

    How to draw jumper or no connection using PROTEUS 7 Professional

    It is not necessary unless you configure the arrangement of your circuit. Proteus is built upon intelligent schematic capture component part. All lines will show as crossing but will only show a dot at connection points (nodes). They use to have some environment settings in the user preference...
  4. logicon

    IR based traffic light control system

    It is a group programming practice to always provide comments for your code blocks for others to understand. Edit your post to enable help.
  5. logicon

    Available mechanism to close and open a door

    Electromagnets may be your best choice. I think the overall energy consumption will be a lot less than using several motors. What you need to figure out is a mechanical latching mechanism for opening and closing. This you will have to design. Let me know if it helps.
  6. logicon

    LM555CN output goes high during circuit power up

    Your problem may not be unconnected with placement of D4 and R36. Could it be the stray capacitance of causing the effect? The combination of R36 and this stray capacitance may result in you not seeing it pull up for time less than 5sec. Investigate the trigger input, resistor, mosfet location...
  7. logicon

    Need help with reversing output voltage (NOT polarity)

    I think a simple transistor inverter interface board will solve your problem. Select the transistor according to your current requirement. Good luck. If it helps, click.
  8. logicon

    3 phase AC Regulator with pic16f877a to save energy in public lighting

    Is your light incandescent or LED? If LED, I suggest you first rectify the scaled-down AC input and power it via DC-DC converter. If incandescent element, you can only rely on a thyristor-controlled PWM converter. The arrangement of the converter depends on the type of load you choose. Click...
  9. logicon

    How to change Login?

    Is it possible to change your login name on edaboard? How do you do that from your profile? I can't seem to see where it can be changed. Any suggestions?:?:
  10. logicon

    code to control DC motor through PC

    You need a controller at the output of the microcontroller to drive DC motor. The controller board must be able to drive forward/reverse with ability to cope with the current rating of the intended motor. L293 or L298 motor driver will fulfill these needs. With L298, you will have to use a 2...
  11. logicon

    4047 monoshot(1ms pulse width)

    Re: ouput drive with debouncer For your concerns: 1. Good visual starts reasonably from 0.5secs for the RED and/or GRN LEDs 2. Yes, you can parallel the capacitors. 3. I will suggest 10K for faster-pull up although this selection will impact a battery operation. Hope this helps.:-D
  12. logicon

    Multiplying a signal's frequency with a constant

    Yes. Feed it into a microcontroller and map the frequency to give a corresponding output at one of the ports. I think it is a programming solution you need. Alternatively, since you claim limited knowledge, you can generate an equivalent voltage using FVC (frequency-to-voltage converter) and...
  13. logicon

    Load suggestions for 24V linear power supply prototype

    Put together a comparator circuit with LEDs as the output... You may use a piezo buzzer at the output. Ensure to use a limiting resistor for each. Hope this helps.:lol:
  14. logicon

    Supply different voltages using one dual DC supply?

    What rating is you dual voltage source?
  15. logicon

    Assistance Identifying Schematic Symbols

    They are all 3-pin terminal connectors. However, the last one has a fuse-inline located on the connector. You can physically disconnect/remove the fuse. Hope this help. Check Wago connectors for varieties.

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