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Recent content by switimira

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    voltage mode feedback control for PWM using C language

    hi there, i need some help regarding the topic..could anyone help?? i have build a buck boost circuit. the thing is i have to make the circuit to have a voltage feedback control. i tried to used basic, it seems that basic could not handle float..so now i try to use c..at least a simple example...
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    change PWM duty cycle with ADC (PIC16f877) to generate constant output voltage

    Thanks BratheRad, how i'm supposed to do so?I mean is it using a voltage divider for the loop? can u give me a simple coding?
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    change PWM duty cycle with ADC (PIC16f877) to generate constant output voltage

    Hi I'm currently making a boost converter. The output need to be 12V constantly. I already built the circuit and managed to boost the voltage. Now i need a feedback loop in order for circuit to maintain the output voltage. I hope someone will help since i really new for this. Really need some...
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    How to switch between two AA battery supply

    Hi leo_o2, Thank you for the reply ^^. Could you give me a diagram or clear picture of this system. ---------- Post added at 04:23 ---------- Previous post was at 02:36 ---------- hi guys, i really new for this..hope anyone willing to help
  5. S

    How to switch between two AA battery supply

    Hello there, I need to design a low battery supply system (5V in) . The system contain 2 supply. One battery supply is used while the other one battery supply is charge using solar. When the used voltage supply is low (< 3V), automatically the other supply is connect to the system. The low...
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    help required regarding COPPERCAM

    Hi cyberrat, Thank you for your reply, but i'm having problem to find where this Import Drill Data come from. Currently i'm using eagle cadsoft software for cam job. Then i use viewplot to view the whole drill file.. There is no problem until then. But as soon as i import these file into...
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    help required regarding COPPERCAM

    here is the drill file:% M48 M72 T01C0.0320 T02C0.0400 % T01 X2101Y1810 X2101Y2810 X2101Y3810 X2101Y4810 X2101Y5810 X2101Y6810 X2101Y7810 X5101Y7810 X5101Y6810 X5101Y5810 X5101Y4810 X5101Y3810 X5101Y2810 X5101Y1810 X7601Y4310 X7601Y5310 X7601Y6810 X7601Y7810 X10101Y6310 X10101Y4310 X12101Y4310...
  8. S

    help required regarding COPPERCAM

    Thanks for the reply, i've already rotated the layout..as mention. there are still holes without pads..you guys said that the file were wrongly read. How i'm supposed to do it correctly?
  9. S

    help required regarding COPPERCAM

    Hi, i need to handle the new cnc machine. I'm having problem with the software part..It happen that my drill are not located to the right place. I don't what was the problem..hope someone will help me.Here i attached a picture of the layout Thank you
  10. S

    How to do a menu selection for LCD display?

    menu selection help hello, currently we are doing a wireless sensor network using xbee. The Rx and Tx is already succeeded. Right now we're working on how to do a menu selection with lcd display. The execution happen only once and then it stop. We seem to not know what is the problem happen...
  11. S

    help!! dc-dc step up converter ic needed

    haiii...i need a boost converter chip that can produces output range from 12 V to 18V..the output current range is below or equal to 1A..The chip must be DIP package so that it is easy to test on breadboard..
  12. S

    help!! dc-dc step up converter ic needed

    Thanks for the reply... i've been searching on the internet for boost converter ics..i've found a lot of them..there are regulated and unregulated..can anyone tell the different between these.
  13. S

    help!! dc-dc step up converter ic needed

    hii...i need to get a dc-dc boost converter chip that can step up min voltage of 3.3V to 18V..how to choose the best model? I have found one product that is max17075 but the manufacturer only have stock for TQFN model..i need a DIP model. thanks in advance..
  14. S

    How to choose the best capacitive water level sensor

    hiii..im working on a project.. i need to find a capacitive water level sensor for shallow depth measurement..can anyone suggest any models or website about this..tQ
  15. S

    Humming from inductor(boost circuit)

    thanks for the reply..:D, let say, if the frequency across the inductor is in audible range, how can i solve it?

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