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Recent content by nagendra.singh

  1. N

    help need to design a constant current source.

    Thanks for help, . For the shunt calibration i want to flow current of 20 amp in copper strip at pcb. very low voltage as 200 Milli volt for low power use. so i want to design a power supply of output voltage of 200 milli volt and 20 amp.
  2. N

    help need to design a constant current source.

    I want to design a 20 amp constant current source and voltage at 200 Millivolt.
  3. N

    atmega88 internal oscillator calibration

    how can we calibrate the internal oscillator of atmega88pa. some ic work well and some ic not. Is there any way to calibrate in circuit.
  4. N

    Mosfet power dissipation

    both mosfet have same rds on as 4 miliohm,Vds is 30 volt and Id 80 amp but power dissipation in datasheet is different. STP80NF03 have300w and 2nd have only 75w. So pls tell me which will be better.
  5. N

    Mosfet power dissipation

    I want to know which mosfet is good in term of power dissipation from data sheet. I want to use STP80NF03L or STP95N3LL in 12volt dc to AC inverter . From data sheet first first have power dissipation is 300w and second have 75w.RDS on almost same about 4mohm. Which will be good ?
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    can we trust microchip ?

    official site is microchip.com not the microchips.com
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    [SOLVED] How can ATMEGA auto detection?

    if i keep same value in device configuration page some ic atmega88pa working well some not. i am using superpro 500p
  8. N

    [SOLVED] How can ATMEGA auto detection?

    i program some mcu but which cal byte is 99 working well.but with on empty chip read found other value like 93 a4 is not working well.output frequency is high. do we have to write cal value same or different for each ic.it is working well which have cal value 99.
  9. N

    [SOLVED] How can ATMEGA auto detection?

    what is cal byte[read only] in atmega ? i read many new non programmed atmega ic with XELTEK super pro 500p programmer but this value always different like 99, B0, A8.
  10. N

    [SOLVED] How can ATMEGA auto detection?

    successfully connect with atmega88pa 28 pin. but with atmega88v smd tqfp 32 pin no connection with programmer. i have no problem with any smd repair up to BGA. changing.
  11. N

    [SOLVED] How can ATMEGA auto detection?

    all four programming pins track are open and 5 volt and gnd connected near to mcu supply line i will arrange tomorrow dip version mcu then i will try.
  12. N

    [SOLVED] How can ATMEGA auto detection?

    first i try with direct wire then on the board.but no success.
  13. N

    [SOLVED] How can ATMEGA auto detection?

    nothing happening. i also try with atmega8 smd version. 28pin dip packege atmega8 and 48 connected pretty well. any other solution ?
  14. N

    [SOLVED] How can ATMEGA auto detection?

    sorry it was connect in that way i write wrong as pin3 should i need to connect both pin 3 & 5 to gnd and pin 4&6 to 5volt? i only connect pin3 to gnd and pin6 to +5volt.could it be th reason.
  15. N

    [SOLVED] How can ATMEGA auto detection?

    i buy a usb programmer clone that is working with avr studio 4.0 in stk500 mode. i connect atmega8 28pin dip package successfully read signature. but now i try to connect atmega88v 32pin smd tqfp package but no success. i connect pin as pin4- gnd pin6- +5v pin15 -- mosi pin16-- miso pin...
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