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  1. D

    help setting fuses on atmega88

    Progisp can solve the fuse problem in AVR
  2. D

    Need Help: 24V 5 Ampere Power Supply

    Well, that is for 5 Volt. For the new one I will use 24V or 30V output from transformer Actually my load is around 2 Ampere, so I decide to make 3A power supply. Is it enough now? I have bought 1N5408 diode for the bridge. Previously I need to build zero crossing detector, so I use D4. Now I...
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    Need Help: 24V 5 Ampere Power Supply

    No, I will not try if it is not sure yet.
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    Need Help: 24V 5 Ampere Power Supply

    Need Help: 24V 3 Ampere Power Supply I have an information that says by combining 7805 regulator with TIP32C transistor will give 5V and 3 Ampere output. It is like this: Now I want to ask, If I combine 7824 regulator like the picture above (I mean replace the 7805 with 7824) , will I get...
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    Need Explanation: Motor's Power Supply

    I use 4 motors, each of them requires 500 mA. Plus micro-controller and LCD. - - - Updated - - - Is there any explanation of my question above?
  6. D

    Need Explanation: Motor's Power Supply

    220 - 12V Zero transformer. As the bridge or to replace the 1N5822 ? Maybe with picture is clearer. Why schottky diode cannot be used? This is the schematic:
  7. D

    Need Help: Make two 5V power supplies

    Exactly the same as post #1 but I don't even build the 7805 circuit yet.
  8. D

    Need Help: Make two 5V power supplies

    Hi, Ive built the LM2576 based supply. First: When I tested it, there is smoke coming from the 1N5822 diode. Did you know why this could happen? Second: I decide to built the new one, then the 100uF capacitor is blown after a while. How can it happen? Third: I'm not giving up, I tried to...
  9. D

    Need Explanation: Motor's Power Supply

    Hi, Ive built the LM2576 based supply. First: When I tested it, there is smoke coming from the 1N5822 diode. Did you know why this could happen? Second: I decide to built the new one, then the 100uF capacitor is blown after a while. How can it happen? Third: I'm not giving up, I tried to...
  10. D

    Need Help: Make two 5V power supplies

    Then what about the ground? Can I still connect them? I got confuse because the motor driver need ground also. If I make two separated power supplies, should I connect the ground to one of the supplies or connect them (both of the grounds) first, and then connect to the driver's ground ?
  11. D

    Need Help: Make two 5V power supplies

    I'm sorry, can you give more explanation. I didn't get it yet. So Can I use it? Is that allowed?
  12. D

    Need Help: Make two 5V power supplies

    Hi all, In my project, I have to use four motors and they are require high current to operate. Because of this, I decide to make two power supplies which are LM2576 based and LM7805 based power supply. LM2576 based supply will be used to power the motors only while LM7805 based power supply...
  13. D

    Need Explanation: Motor's Power Supply

    Alright, thank you very much.
  14. D

    Need Explanation: Motor's Power Supply

    I got confuse with my motor driver. Check this:
  15. D

    Need Explanation: Motor's Power Supply

    Look at this picture: I decide to make two power supplies. 1. Can I connected the ground of both power supply as shown by that picture? 2. I use step down transformer 220 to 7-9 V. Is this (7-9) too small/big ?
  16. D

    Need Explanation: Motor's Power Supply

    Thank you for your very clear explanation. I want to ask one more thing. What about my minimum system, LCD, and the other that required 5V but not so high current ? Can I take the power from this also or make separated power supply for them?
  17. D

    Need Explanation: Motor's Power Supply

    Hi too, 1. So you mean if all the four motors operate together, they will need (500 mA x 4) = 2A ?? 2. What about my transformer, diode, and capacitors ? I use 1A transformer, 1N4001 diode, and 25V capacitors. Should I replace them too ? 3. Is there any other FIXED regulator that result 5V...
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    Need Explanation: Motor's Power Supply

    I build 5V power supply using 1A transformer and 7805 regulator. I want to drive 4 Motors. Each of the motor require 500mA to operate. My question, If all the motors should operate together at the same time, is my power supply enough or I need to build a new one with higher current rating? I'm...
  19. D

    Need Help: TV Remote to replace push button

    I've built a simple code (AVR) that contain 12 push buttons. I'm planning to replace all of them with TV Remote so that they can be accessed using one Remote control only. Well, is this possible? (12 buttons) This is my code: #include <mega8535.h> #include <stdio.h> void main() {...
  20. D

    Need Help: Power percentage calculation in phase firing angle

    yes resistive load. is there any links or sources that give more explanation? Thank you.

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