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  1. Arduino 4116 dram tester. Free Gerbers.

    Hello!

    Here is my final 4116 tester. You can have all files from the link bellow.

    Including: Part List, gerber files, arduino code, driver for clone arduino

    Testing time: 11sec~

    You can...
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    Almost done. Some last components to finish the...

    Almost done. Some last components to finish the project. Crossing fingers to work at the end.

    https://i.postimg.cc/ZY65D5RT/E963-CE56-22-B9-49-D6-AC75-6-A1709-BF073-E.jpg
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    Poll: The first PCBís just arrived. A long trip just...

    The first PCBís just arrived. A long trip just started till the end. Need to check the board compared to schematic and get the components. :)

    Anyone have a PAL programmer?
    ...
  4. Is Hantek DSO5102P Oscilloscope good for hobbyist?

    Hello all.

    i am hobbyist at electronics and i want to buy an Oscilloscope. I never had one before and i want to make a gift to my self. :)
    Is Hantek DSO5102P a good choice for beginner?
    ...
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    Poll: The Startek DT-90 Project.

    https://i.postimg.cc/4mbXrdkJ/c6C0Fi5.png


    There are few days now that i am working on Startek dt-90 project. My goal was to keep the board same as the original and that was a bit tricky for me....
  6. Omg yes it’s true! It is in forward page. Thank...

    Omg yes it’s true! It is in forward page. Thank you!
  7. Info about the STARTEK DT-90 Dram Tester.

    Hello everyone.

    I really want to collect infos about the Startek dt-90 dram tester. I know about the magazine pdf, Palís ic files, the components list and pcb print, but nothing about the...
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    This is the final design for my Arduino 4116...

    This is the final design for my Arduino 4116 Dynamic Ram tester. At least for this version. I canít wait for my first prototype boards to came and start the testing. After that and if all go smoothly...
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    I am in progress for 4116 Dram tester. Still in...

    I am in progress for 4116 Dram tester. Still in testing. To be more specific, i am waiting the first boards to come and do my tests.
    It is an Arduino 4116 Dram tester. Have in mind that the board...
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    Some more photos that may help. ...

    Some more photos that may help.

    https://i.postimg.cc/xJxVv5Hm/06297-F2-A-3253-4-F30-B3-FA-A6343561-D75-F.jpg

    https://i.postimg.cc/QBq3thd0/4-E51-DFA0-711-B-45-D4-84-B1-89-B627559640.jpg
    ...
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    I know Sotos73 and we just talk. He have problems...

    I know Sotos73 and we just talk. He have problems to upload photos. I post some for him.

    Today he boot the computer and got normal screen but after some time the cursor frozen....
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    I see. Thank you very much.

    I see.

    Thank you very much.
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    Thank you both! In third photo you can see the...

    Thank you both!

    In third photo you can see the back of the switch panel, but I can post better photo’s soon.

    Have a nice day.
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    Thank you. I keep this in my mind if I have...

    Thank you. I keep this in my mind if I have problems in the future.
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    What device is this please?

    Hello everyone.

    Anyone know what device is this please?

    57978 57979 57980 57981 57982 57983

    Thank you.
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    Yes, i get the point. Thank you I decided to...

    Yes, i get the point. Thank you

    I decided to leave at least the hardware as is. And if in the future something fail, i do the necessary replace.

    Now i am in the middle of keyboard refurbish....
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    Yes, I understand. "Do only the necessary".

    Yes, I understand. "Do only the necessary".
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    Ahhh. Of course was not. As the monitor was...

    Ahhh. Of course was not. As the monitor was separated from the body case. As you saw in my photo.:rolleyes:
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    I understand what you mean about surviving Dave...

    I understand what you mean about surviving Dave and you are right. I know that it is an old hardware with no guarantee. I just want to replace the components that are more "fragile"? I donít know if...
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    Thank you! I prefer to disassemble all the...

    Thank you!

    I prefer to disassemble all the keyboard for clean the keycaps too. I do your steps with isopropyl alcohol and I post the results here.

    One more thing I want to ask is the recap. I...
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    Hello everyone and sorry for the late reply, very...

    Hello everyone and sorry for the late reply, very busy at work.

    I have good news! I start with what Dwight ask me to check. i found no shorted capacitor's. So i replace the 7905 with ST L7905cv at...
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    Thank you both! I did a mistake. The neg...

    Thank you both!

    I did a mistake. The neg voltage regulator is indeed 7905c and not 7906. Sorry about that. He have both numbers and this confuse me. To be honest, when i read 7906 in the...
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    PET 2001-32N BS, with horizontal lines.

    Hello everybody!

    First of all please forgive me for my not so well English, it is not my first language. So...

    Before two days i got my precious Commodore PET 2001-32N BS. Till now i never had...
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    Hello all! I have the same issue on my...

    Hello all!

    I have the same issue on my 2001-32N. I try to find a solution with all useful things posted here. If still have a problem, I start a new thread.

    I just waiting the schematic for...
  25. Great news thank you! I got a faulty beauty...

    Great news thank you! I got a faulty beauty yesterday and i need this for my tests!
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