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Recent content by ColdFire

  1. C

    How PWM control output current and voltage

    Dear All, I am referring to a Buck Converter Battery Charger for Li Ion, how can I control the constant current charge and then constant voltage charge using PWM? Thank you. Regards
  2. C

    How PWM control output current and voltage

    Dear All, Can anyone explain how PWM control output voltage and current? Correct me if I am wrong. PWM Duty cycle controls the output voltage and PWM freq control the output current. Regards
  3. C

    IoSoft ER22 and ER25 PIC18 WLAN Boards

    Hi All, Anyone have the schematic and firmware comes with IoSoft ER22 and ER25 PIC18 WLAN Boards? Please advice. Thank you. Regards
  4. C

    How to draw V-Cut in Eagle?

    eagle v-score cadsoft Hi All, Does anyone know how to draw V-Cut in Eagle (for making multiply PCB within one PCB board)? Please kindly advice. Thank you. Regards
  5. C

    Where can I get info about PIC I2C Bootloader?

    bootloader i2c You can have a I2C Bootloader. For example if I will to write a firmware into MCU via a MPU using I2C and this MPU is connected to the PC via USB.
  6. C

    Where can I get info about PIC I2C Bootloader?

    Hi All, Does anyone here have done I2C bootloader for PIC16 or any website I can refer to? Please kindly advice. Thank you. Regards
  7. C

    How to create a capacitive sensing using MCU ?

    ipod capacitive sensing Dear All, I am using a MCU to create a capacitive sensing switch but have no idea how to do it. Can someone advice how to do it and its principle. Thank you. Regards
  8. C

    What is the dufference between CF775 and PIC16C75

    what is this cf775 & Hi All, Both devices are the same. The reason for the different part number is because some companies is making PIC16C75 other than Microchip. Regards
  9. C

    How to implement capacitive slider switch with a MCU?

    Re: Capacitive Slider Switch Hi All, Thank you for the information. I am hoping to implement the capacitive slider switch using my current MCU which is a PIC. I am thinking to make the slider onto the PCB but I think this is very tricky, there will be noise and other issue. Not sure if anyone...
  10. C

    How to implement capacitive slider switch with a MCU?

    Capacitive Slider Switch Hi All, My project requires a capacitive slider switch, anyone know how to implement this with a MCU? Currently my project is using PIC. Please advice. Thank you. Regards
  11. C

    Has anyone here used a dsPIC30F?

    Hi, After it expires, you can still use it, no need to reinstall. Regards
  12. C

    Has anyone here used a dsPIC30F?

    Hi, I am using dsPIC for my BLDC motor controller. I am using C30 from Microchip. You can download the demo to use, however it will expire after certain number of days, I cannot remember how many days, but it still compile full code except cannot use optimize features. Still good for me. Thank...
  13. C

    Freescale USB Full Speed MCU

    Hi All, I have tried Microchip USB, it is good but the price is quite high, about 3USD. How much does Freescale cost? Thank you.
  14. C

    Freescale USB Full Speed MCU

    usb full-speed mcu Hi All, Anyone know if Freescale is coming out with a full speed USB 8 bit MCU? Thank you. Regards
  15. C

    How to make a inverter for EL Blacklight or Camera Flash Light?

    Hi All, Anyone know how to make a inverter for EL Blacklight as well as for Camera Flash Light. What are the way to do? Thank you. Regards
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