Hi
I've built an inverting set up with a lm318p op amp,
but I can't seem to even get an inverting signal in general?
I just want to get it working so right now the gain is only 1 (using two resistors of same value)

Ive posted a picture

 

hi,
Please post a diagram of your circuit.
E

 

oh sorry. Here ya go

 

sorry im new to this
the supply voltage is +9V
I connected the V- to GND

 

I see ground.

I don't see power. You have red plug plugged into breadboard red socket. Normally from red socket you would run a wire to the breadboard. But you got nothing running from red socket to the breadboard.

 

There's something there. its just a black wire

 

There's something there. its just a black wire

hi,
On some types of project board the power rails [ along the long edges ] are not linked thru at the centre pins.

So if your gray wire is your scope 0V, it may not be connected!.

Move your scope 0V lead to near the power input rail.
E

 

Don't forget to add power supply bypassing. The LM318 is very likely to oscillate without proper bypass.

 

Tried that also. Didnt work!
But thanks though
Does it have to do with the parameters I have on the function generator?
1kHz, 100mVpp 50mVos

 

Don't forget to add power supply bypassing. The LM318 is very likely to oscillate without proper bypass.

What is power supply bypassing?

 

Hello,

Have a look here for info on bypassing capacitors:
Decoupling or Bypass Capacitors, Why?

Bertus

 

Hello,

Have a look here for info on bypassing capacitors:
Decoupling or Bypass Capacitors, Why?

Bertus

oh ok thanks!
which capacitors do you suggest i use

 

oh ok thanks!
which capacitors do you suggest i use

hi,
A 100nF near the OPA and a 47uF on the project board power rails.
E

 

I noticed the wire you have connected to pin 3 (Vcc-) is connected to your Vcc+ ... assuming that red wire is Vcc+

The area around the posts is very unclear. Neaten up your diagram ....

 

What program did you use to do the bread board layout?

This is the strip board version of the same circuit.