COMPLEX SOUND CHIP 76477

[large_ghostman]

Just hard solder it in the board, I personally think its a good little chip for what it does and the retro sounds would cool. I *might* get one to play with depending on what they cost

 

[jpanhalt]

Try CTRL+SHIFT+P . Print to pdf is often shown as just another printer. My version shows "PDF995."

John

 

[MrDEB]

been re thinking how to mount all the caps and resistors that connect to the rotary switches. At present I have a design where the main board has 2- IDC 14 pin connectors but still need to hard wire each switch so maybe just mounting all the resistors and caps on main board is the better option.??
Will try getting a pdf as suggested

 

[MrDEB]

Tried the Ctr Shif P and looks like an improvement

 

[large_ghostman]

That is completely unreadable!

 

[JonSea]

Why would you zip a pdf? The zip file is probably larger than the original.

 

[JimB]

Why would you zip a pdf? The zip file is probably larger than the original.

I agree, zipping a PDF is a poor idea.

JimB

 

[JonSea]

Plus it makes it a pain in the backside to look at it. Don't create extra steps for people who might be willing to help you.

 

[large_ghostman]

Hi Jonsea, fancy seeing you here!!

 

[JonSea]

You won't see much of me!

 

[Mikebits]

SN76477N

Im surprised you were able to find these chips. The part number looked real familiar to me, so today I google one of the numbers, and I recognized the block diagram. I had bought one of those chips back in the 70's when I was a teenager. In fact I still have the part in my IC tray (Boy am I a packrat). If I recall, it was a pretty fun part to play with, of course at the time, I had no idea what all the blocks did, and only figured out what they did thru experimentation (Before internet, we were on our own).

 

[MrDEB]

Well been laying out different boards and trying to cut down on the parts count as well as getting a readable schematic to post. I recall having to use bitmap but??
here is where I am at. Lets see if this is readable

 

[JonSea]

You might go back and read the 5 forum pages where people went into excruiating detail in an attempt to help you post a readable schematic. I doubt anyone will try again to guide you through the process. BTW, the schematic you posted is not readable.

 

[MrDEB]

I attempted to searc for the thread about posting a readable schematic and unable to find it. Tried several search terms but no success.
I do recall using a bitmap and infa view.
Going to try several options. Thanks for input

 

[MrDEB]

well here I increased the jpeg to 600 DPI lets see if this is any better.
In preview it looks pretty good but I didn't get all of the schematic Oups,
I used a generic pattern for all the switches as they are all SPDT except the mono pushbutton but they are clearly marked.
Still looks like too many parts but?? I have the time after I order some boards.

 

[JonSea]

30 seconds. Posting a two page schematic

Reasonably clear instructions, with one recommendation that shouldn't need repeating again:
"When you make a post, look at the file once it's posted. If YOU can't read it easily, delete it and save it in a larger size. If you can't read it, don't expect anybody else to make the effort to do so."

This picture is from you latest schematic. Either the pins on the chip are labeled in Chinese or your schematic isn't readable.

Note to LGM: Sigh. You were right.

 

[JonSea]

One more hint: Get rid of the crap you don't need. I have no idea what the column of stuff down the left side of what you posted is, but it's not essential to viewing the schematic. Crop your images to the essential areas.

 

[atferrari]

Why would you zip a pdf? The zip file is probably larger than the original.

Yes, quite often, it is.

 

[JonSea]

I'm gone. Have fun.

 

[large_ghostman]

I'm gone. Have fun.

I am not saying a word Jonsea .

Mr Deb.................

The very first one you posted in this thread I could read, I said at the time that JP started talking about PDF's etc DO NOT DO IT!! You had it working when you first posted in this thread, golden rule of life if it aint broke dont fix it (unless your bored or me). So go back to what you did with the first schematic in the first post or two in this thread. We can help you draw a decent one once we can read it.

Dont worry about switches etc, first job get the drawing readable, second job we work on making the schematic easy to understand. THEN we can start designing and adjusting circuits, this way will get your project done fast, ANY other way will result in a...........................