1. Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
    Dismiss Notice

EEPROM

Discussion in 'Microcontrollers' started by bogdanfirst, Mar 20, 2003.

  1. bogdanfirst

    bogdanfirst New Member

    Joined:
    Dec 13, 2002
    Messages:
    1,310
    Likes:
    1
    Location:
    Ramnicu Valcea, Romania
    but that is the problem .....i got a colegue in my clsass that i thing he can do that in about 10-20 seconds...and he is no genius and he wasnt born with this ability, he just trained....
    thats true....speed matters, but the brain is used only a little, if you train you can do better and better
     
  2. bogdanfirst

    bogdanfirst New Member

    Joined:
    Dec 13, 2002
    Messages:
    1,310
    Likes:
    1
    Location:
    Ramnicu Valcea, Romania
    ok, now back to EPROMs i got some old EPROMs wich i wana use for controlling some leds, but the problem is programming...is there a VERY simple programmer for 2716 to 27512? i mean a programmer with little components and easy to find? i searched the internet but i couldnt find what i need. the problem was that they were quite simple but i couldnt find those ICs needed for it.
     
  3. kinjalgp

    kinjalgp Active Member

    Joined:
    Oct 28, 2002
    Messages:
    1,851
    Likes:
    3
    Location:
    INDIA/USA
  4. dave

    Dave New Member

    Joined:
    Jan 12, 1997
    Messages:
    -
    Likes:
    0


     
  5. daviddoria

    daviddoria New Member

    Joined:
    Jan 7, 2003
    Messages:
    384
    Likes:
    0

    kinaljp, that was a very informative site on memory types :)

    thanks
     
  6. kinjalgp

    kinjalgp Active Member

    Joined:
    Oct 28, 2002
    Messages:
    1,851
    Likes:
    3
    Location:
    INDIA/USA
    The calculations you have done are correct but when I mentioned 1Gb meant 1 GIGA-BIT and not Giga-Byte :) So your time will reduce to about 8 times since 8-bits = 1 byte.
     
  7. bogdanfirst

    bogdanfirst New Member

    Joined:
    Dec 13, 2002
    Messages:
    1,310
    Likes:
    1
    Location:
    Ramnicu Valcea, Romania
    ok, about that link on EPROMs, it looks like quite a simple programmer on second thought, but i cant find replacements for the MPSA65 transistors...any ideas?
    and the ones labbeled 558 and 548 are BC558 and BC548?
     
  8. arcom

    arcom New Member

    Joined:
    Jan 12, 2003
    Messages:
    102
    Likes:
    0
    Location:
    Milky way
    I thought so. One gigabyte is written in capital letters. Silly me. Well, nevermind, that still leaves 4,25 years :)
     
  9. kinjalgp

    kinjalgp Active Member

    Joined:
    Oct 28, 2002
    Messages:
    1,851
    Likes:
    3
    Location:
    INDIA/USA
    Yes they are BC558 and BC548. As I said in other post, I am not able to locte my transistor selector book so I can't find exact replacement for MPSA65.
     
  10. drrogla

    drrogla New Member

    Joined:
    Mar 31, 2005
    Messages:
    79
    Likes:
    0
    Location:
    Slovenia, Hrastnik
    Found my yellow book:


    mps-a 65:
    Si-P-Darl Uni,30V,0.3A,0.625W B>50000
    _____
    / . . . \
    |_______|
    C B E

    replacement bc 880:
    Si-P-Darl 100V,1A,0.8W,200MHzb>2000
    Low frequency switch
    _____
    / . . . \
    |_______|
    B C E

    !!!!!!!!!!!
     

Share This Page