Electronics > Beginners

Basic Function Generator help

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rstofer:
It's probably just the way the photo is cropped but I don't see where pin 11 (Vee) connects to anything other than the blue rail which, apparently, goes nowhere.  Are the PS connections out of the photo?

I would prefer to connect the two binding posts that create the midpoint together at the PS.  I want only 3 wires leaving the supply, not 4.

I don't know anything about your breadboards but on many of the longer boards, the power rails aren't continuous from end to end.  There is a gap in the middle.  That fact has caught up a lot of new users.


Audioguru again:
Photos of solderless breadboard circuits are always a tangled mess of wires all over the place.
In your schematic, the slider of your pot is not shown where it connects to.

dcbrown73:

--- Quote from: rstofer on August 06, 2019, 02:45:26 pm ---It's probably just the way the photo is cropped but I don't see where pin 11 (Vee) connects to anything other than the blue rail which, apparently, goes nowhere.  Are the PS connections out of the photo?

I would prefer to connect the two binding posts that create the midpoint together at the PS.  I want only 3 wires leaving the supply, not 4.

I don't know anything about your breadboards but on many of the longer boards, the power rails aren't continuous from end to end.  There is a gap in the middle.  That fact has caught up a lot of new users.

--- End quote ---

I'm not home, but this a picture of the the breadboard I'm using.  I have the red (+9v) / black (-9v) banana plugs jumpered to all the red / blue rails on the board.   



The + and - pins entering the opamp were tested and are at sitting at -9v (blue) and +9v. (red)


--- Quote from: Audioguru again on August 06, 2019, 04:57:58 pm ---Photos of solderless breadboard circuits are always a tangled mess of wires all over the place.
In your schematic, the slider of your pot is not shown where it connects to.

--- End quote ---

In this picture, the pot's wiper is connected to the output pin while other is connected to the -input.  I've flipped it before too.  I figured since it's a non-polarized variable resister.  It probably didn't matter.

As suggested above.  I will remove the 3rd pin from being connected to the gnd rail (which is sitting at -9v)

Gyro:
@dcbrown73:

A small request. Can you please change your thread title to something more related to the topic, eg. 'Basic function generator'? It's easy to do by editing the title in your original post and might just help somebody in the future.  :)

kulky64:
Can you post a picture of the whole setup (power supply, all leads and breadboard) all in one frame at the same time when you get home? So we don't have to guess where things not in frame are connected.

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