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 Forum index » DIY Hardware and Software » Circuit Bending
DIY Synth Schematic Question
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duffyjoh



Joined: Jul 01, 2012
Posts: 3
Location: Detroit

PostPosted: Sun Jul 01, 2012 11:08 pm    Post subject: DIY Synth Schematic Question Reply with quote  Mark this post and the followings unread

hi everyone,

I'm modding a circuit to a bleep labs pal198x but I have some questions about integrated circuits. Basically, I want to create it from scratch (no pre-made PCB) and house it in an old enclosure with a ribbon controller. I know that the integrated circuit symbol on the schematic diagram means that I need an opamp (a 324AN) but I'm not sure which pins on the op amp get connected to which wires. Basically, I'm wondering what an integrated circuit really is and how to hook up the 324AN.

Any help would be greatly appreciated. I'll be sure to include pics when I'm done.

Thanks again,
JD

PS: Here's the schematic:
http://bleeplabs.com/wp/wp-content/uploads/2011/08/PAL198X-SCHEMATIC.png
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bubzy



Joined: Oct 27, 2010
Posts: 555
Location: United Kingdom
Audio files: 62

PostPosted: Sun Jul 01, 2012 11:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

welcome to electro-music !!

maybe this will help

https://www.google.co.uk/search?rlz=1T4ADFA_enGB464GB464&q=lm324+pinout&um=1&ie=UTF-8&hl=en&tbm=isch&source=og&sa=N&tab=wi&ei=0TrxT8HvKKq50QWJkfTdDQ&biw=1680&bih=900&sei=0zrxT-nRCdOa0QXiiPzrDQ

for integrated circuits, you can google "<youric> pinout" and 999 times out of 1000 get what you need. as you can see the image matches the image in your schematic.

hope this helps
Smile

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duffyjoh



Joined: Jul 01, 2012
Posts: 3
Location: Detroit

PostPosted: Mon Jul 02, 2012 9:02 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi Richard,

Thanks so much for your help. This may be a another beginner question, but on the schematic where the IC says +9v and ground, does this indicate that the V+ pin must be connected back to the battery and the opposite GND pin must be connected to the metal housing?

Thanks again,
John
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bubzy



Joined: Oct 27, 2010
Posts: 555
Location: United Kingdom
Audio files: 62

PostPosted: Mon Jul 02, 2012 9:32 am    Post subject: Reply with quote  Mark this post and the followings unread

yep +9v is back to the positive terminal on the battery

and

nope, GND is usually referring to the 0v of a power supply, so in te case of a 9v square battery it would be the "negative" terminal.

keep asking questions, its the best way to learn, also drop by the chat room for some more instant answers (when people are active in there)
Smile

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duffyjoh



Joined: Jul 01, 2012
Posts: 3
Location: Detroit

PostPosted: Mon Jul 02, 2012 9:51 am    Post subject: Reply with quote  Mark this post and the followings unread

Hi Richard,

Again, thank you so much for your insights. I can't wait to start experimenting with this project. I'll be sure to post some pics when I'm farther along.
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