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Recent content by dexter0904

  1. dexter0904

    guidance for digital clock

    here is digital clock step by step with ds1307 https://picnote.blogspot.com/2009/01/simple-clock-using-ds1307-pic16f877a.html
  2. dexter0904

    Load Cell + 0804 +8051 microcontroller

    Yes, you have to use op-amps for some amplification. or you can use ICs lilke AD620.... usually Microcontrollers come with ADC resolution not more than 12 bits like dsPICs30F6011a,
  3. dexter0904

    Load Cell + 0804 +8051 microcontroller

    did u google ? There are tons of info on this...
  4. dexter0904

    Square wave detection

    **broken link removed**I suppose your fall time(Red duration) remains same from 0-500Hz and here is hardware solution in my opinion. use an RC filter having time constant slightly greater then the then fall time... example: Red-Duration=1nSec Let R=100R C=1nSec/100R= 10uF hope it helped..
  5. dexter0904

    guidance for digital clock

    you can use any timer, better if you use which has support for external clock source and which can be incremented during sleep mode(display-off ). It is nice to emulate RTC in software, however keep in mind; Timer should be incremented no matter what happens or you lose time setting. For this...
  6. dexter0904

    [SOLVED] Can i use 5V 5A dc supply to connect to a board which require 5V 500mA supply??

    you can connect Constant current source(500mA) b/w GSM module and 5V-5A Supply...
  7. dexter0904

    [SOLVED] Can i use 5V 5A dc supply to connect to a board which require 5V 500mA supply??

    Yah, thats true.... Theory = you can connect small load to to high current source with no problem as amount of current is 'drawn by' the circuit.... Practice= You need to Limit current drawn from high current (Very Low Impedance source) or you will burn your components. Demo= Connect your...
  8. dexter0904

    Having noise in clock generated using TMR0 Interrupt :MCU::PIC16F73

    Give some delay(adjustable) between changing duty-cycle and getting feedback...
  9. dexter0904

    Having noise in clock generated using TMR0 Interrupt :MCU::PIC16F73

    Use decoupling Capacitors with Power Supply, How ever it would be more clear if you post your Schematic...
  10. dexter0904

    Hardware I2C or Soft I2C ? which is better and accurate ?

    Well, regarding your particular application, if you are Ok with these PIC16f628A or PIC16F72 you can use them with mikroC's Soft-I2C Library... Accuracy in this case epends on the I2C-RTC IC, which you don't have to worry about... Best Regards, waqas
  11. dexter0904

    problem while interfacing the ds1307 for EEPROM memory

    You coding error... here I have tested this one, it works except for the am/pm display on LCD... https://www.8051projects.net/download-d3-digital-clock-alarm-using-ds1307-8051-updated.html Best Regards, waqas
  12. dexter0904

    100 KHz MOSFET gate drive with op-amp

    Nop, Its just switching... great ok, Blast Op-Amp Great, So Lets Start with Simplest things that are confusing at the first place... 1. Zenner Selection for Gate...? I have seen a post by " FvM " that most MOSFETs even Power MOSFETs has a V(GS) limit of 20 Volts Max(though they are more...
  13. dexter0904

    100 KHz MOSFET gate drive with op-amp

    Well, those comments are pretty help full... There are some op-amps that are capable of driving un-limted capacitive load **broken link removed** I thought it is possible because I have seen some circuits on some websites for MOSFET Gate Grive, but they are limited to about 20kHz...like (9...
  14. dexter0904

    100 KHz MOSFET gate drive with op-amp

    Perhaps, I might not able to express my query correctly.... I have Mosfet Drive ICs like PC923 and TLQ250.... They don't work at 100KHz... Their are other gate Drivers from LTC, Texas Inst. and Microchip(I had my research), but their is availability issue and Learning Enthusiasm to build my...
  15. dexter0904

    100 KHz MOSFET gate drive with op-amp

    Well That is obvious... I have to use 2 MOSFETs in half bridge with inductive load at 20Amps.... best regards, Waqas

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