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Recent content by orsa99

  1. O

    Problems with the fusebits (atmega8)

    alexan_e, THANKS! :grin: I used the capacitor 100pf and resitor 330 ohm and atmega8 is unlocked! Thanks for all! Best regards
  2. O

    Problems with the fusebits (atmega8)

    I have available also: 2 capacitor 100nf 2 resistor 4,7 kohm 2 " 10 kohm 1 " 15 kohm 1 " 33 kohm 1 " 100 kohm 4 " 150 kohm
  3. O

    Problems with the fusebits (atmega8)

    Yes, i have four capacitor 22p
  4. O

    Problems with the fusebits (atmega8)

    Today is Sunday, tomorrow i will buy the capacitor 100pf and resitor 330 ohm.... I'm curious.....what's the configuration default (fuse bits) of the atmega8 just made from Atmel?
  5. O

    Problems with the fusebits (atmega8)

    The atmega8 datasheet says : "Problem Fix / Workaround Use external capacitors in the range of 20pF - 36pF on XTAL1/TOSC1 and XTAL2/TOSC2. This will be fixed in ATmega8 Rev. G where the CKOPT Fuse will control internal capacitors also when internal RC Oscillator is selected as main clock...
  6. O

    Problems with the fusebits (atmega8)

    Ok, i have committed a folly :oops: i will buy a new micro thanks at all for the answers!
  7. O

    Problems with the fusebits (atmega8)

    I wrote and changed the fuse bits for this to 12 mhz : **broken link removed** I selected from https://www.engbedded.com/fusecalc : ext. RC Osc. 12 mhz It's correct? Best regards
  8. O

    Problems with the fusebits (atmega8)

    I used in the first time an external crystal to 12 mhz and https://www.engbedded.com/fusecalc for the setting, i selected ext. RC Osc. 12 mhz . If i want to change the fusebits of the atmega8 for other use, the connection with the square generator is the only way? There is no other way?
  9. O

    Problems with the fusebits (atmega8)

    I use this ptrogrammer: https://diy4fun.blogspot.it/2009/01/simple-serial-programmer-for-avr.html I wrote an atmega8 without problems. When i change the fuse bits for an ext. RC Osc. 12 mhz (ckse0,1,2, ckopt, sut0 it's correct!), after i have connected the RC.osc 12 mhz with capacitors, but...
  10. O

    Help for the avr atmega8

    I have selected with precision this : Ext. Crystal resonator high freq.; startup-time: 16K CK +64MS;[cksel=1111 SUT=11] CKOPT= unprogrammed The atmega8 datasheet is here : http://www.atmel.com/images/doc2486.pdf What do I look? thanks Giulio
  11. O

    Help for the avr atmega8

    Yes I did it (cksel3 checked, cksel0,1,2,3 unchecked)
  12. O

    Help for the avr atmega8

    alexan_e, thanks for the answer, but today i have blocked the atmega8! I have selected cksel3 and not cksel1,2,0 for one distraction and it is not go. Looking for your site i did this : Hi, I am new in this forum last time my ATMEGA8 has locked, and so i search how to unlock my...
  13. O

    Help for the avr atmega8

    Good morning at all. I want built this: http://www.cithraidt.de/joyadapter/index.html I need to change the fusebits of the atmega8. 1) first i flash with hex files and only AFTER i change the fusebits? 2) When i have changed the fusebits (ext. rc. osc. to 12 mhz) , i can not do it...
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