Electronics > Projects, Designs, and Technical Stuff

Vacuum Fluorescent Display Driver

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bostonman:
Oh okay, I should have realized it. I was focused on thinking both N and FN were DIP.

My attention was: new IC model 518 is the PLCC and old model is DIP; and both DIPs came in a N or FN option.


bostonman:
I bought six of these for $36


https://www.ebay.com/itm/325686864607?epid=1718442701&itmmeta=01HZR9DBRFN0HEZH2TY8GH04JX&hash=item4bd4732adf:g:ISgAAOSwrwhkgmQ~&itmprp=enc%3AAQAJAAAA4FfSigCHd%2BTuVaEiHXE3KyQWntr7hqnMIKSg%2FwznHO12HJJR0Qn7tAxoMFVzqWnRDp%2FkTSjs2fWfhEITunRwa5YDvekl0h8tAXzDDJqU024tCBm7YPYL4R9al7UGSn00R4OeBPXPjtPor%2BmgsMXdAHkELnkU5S9CKWcMkM26PSh80hHtk690RWQXfBgqY6y4EmdeYyt4b%2BFTtL2guDFE7GNfduuJOj7KJhENRB3%2F5Mz4MOR6QFsB8YPlQU%2BbdK5%2FQNRNP8yogNicZDDQ7WkVS%2BB91v51X1pWePSqbKyd0iPI%7Ctkp%3ABk9SR6a8tYn-Yw

bostonman:
I'm still trying to make time for a daughter board, so this is why the thread hasn't been updated.

bostonman:
I've completed the schematic (it's nothing spectacular) and the PCB (see attached).

Rather than draw all the connections on the schematic, I used ports. Also, I may have wasted time creating a PCB with both ICs since ideally the surface mount replacement one can't be used since it keeps blowing, however, it opens the option for using the correct one should a need arise.

The schematic has some issues. The IC pins aren't labeled input or outputs, and all the ports are facing one way. The PCB shows pin 1 on the VFD being at the wrong end.

Unfortunately it took me a bit to re-familiarize myself with PCB layout along with creating components. Once I was knee deep, I just kept the errors as is.

Earlier I ordered the PCBs (I'm waiting to see if the company finds any issues).

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