I am attempting a diy project and I am completely new to electronics so please bear with me. I found a schematic online which I want to create a pcb from. I know the very basics about pcbs and schematics in general.

The original schematic I found uses three 8-pin ICs but the way the schematic was drawn has each IC's 8 pins split up into two separate-looking parts for easy understanding.

I tried to recreate the same schematic but with each actual 8-pin IC as one solid component. This is so I can create a PCB easier (layout out etc).

Could you kindly look at both the original and my redrawn one and see if I have done it correctly and it is exactly the same circuit before I order the board? I would really appreciate it.

Original: enter image description here Re-drawn one: enter image description here


closed as too broad by uint128_t, Enric Blanco, DerStrom8, Dave Tweed May 8 '17 at 0:55

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • \$\begingroup\$ Comments are not for extended discussion; this conversation has been moved to chat. \$\endgroup\$ – Dave Tweed May 8 '17 at 0:55

I have pointed out some of the problems in the below diagram- there may be more, I just ran out of patience and my coffee arrived:

enter image description here

The dot on C2 means you didn't line up the wire with the end. It will still be okay but it looks ugly. I didn't flag it but C2 and C3 do not have polarity. The symbol should be different. U1 1&2 are shorted. V- on the op-amps is wrong on all 3 (but in two different ways). The pots and the 6 connections to each pair are completely wrong. R9 is the wrong value. The output jack J3 has left and right channels swapped, and so does the input jack (not marked).

I agree with the comment that not breaking the op-amp into proper symbols as in the original makes it harder to follow. I have yelled at people for this kind of thing. That is a style issue, but it's more worrisome that you have missed a lot of details.

Consider looking at the netlist that Orcad generates (in human readable form)-- you should be able to see each individual net and verify which pin of which part is connected to each net.

  • 1
    \$\begingroup\$ Wow. Thanks so much for taking the time to answer my question. This is my first ever attempt at anything electronics, so it is clear I may have bitten more than I can chew. I have so much to learn. Thanks! Hope the coffee was delicious. \$\endgroup\$ – Bruno May 7 '17 at 15:41

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