Pololu G2 current sense output for Spindle load meter?

okay before i buy an OPA, i have a CA358e from RCA laying around and it should be an opamp but i only find the datasheet for CA358 or CA358a (the datasheet = 4donline.ihs.com/images/VipMasterIC/IC/H...2B6ED9A73243A3159BB0). does anyone know if i could use the CA358e?

edit: which opamp would be best suited for my project? i dont have much knowledge when it comes to such things :/

thanks

okay thank you, i will see what i can do

i breadboarded it but it doesnt seem to work (no reaction to when i try to stall the motor, except when i touch the motor housing i see a little bit, but the Current sensing output does definately output correct). Either the opamp is defective or i wired something wrong.

5 V to the + pin (8), ground to the - pin (4), current sensing pin to non-inverted-input a (3) and output a (1) to my oscilloscope (negative of the oscilloscope to ground)

edit: which opamp would be best suited for my project? i dont have much knowledge when it comes to such things :/

i guess one that has a maximum output of 3,3v, but which one i dont know

Okay i think i got it working. I wired the opamp according to this site: www.learningaboutelectronics.com/Article...g-op-amp-circuit.php and now i can see change with my oscilloscope. Is it normal that it is not a straight line but zigzag like? Probably can be filtered on the analog in i guess.

Thank you for your help

yeah i looked at the current sensing output and it is zigzag aswell (probably because of the pwm signal)