Problem with my relaxation oscillator!!!?????

[WidElectronics]

Hi all,


I have attached an image of the relaxation oscillator circuit that i have designed. Here, I am not getting the square output. The output voltage is showing 0V. I have used LM741 opamp. Can anyone suggest me what is the problem with the circuit!!!???? .... I tried by changing the values of R1, R2 and R3..
Plz...anyone guide me..............
Thank you in advance

 

[betwixt]

Applying negative feedback will not make it oscillate! Are you sure you have the inputs to the 741 the right way around.

Brian.

 

[milind.a.kulkarni]

If it is relaxation oscillator that you want to make you need to fine tune even capacitor value even try C=1uf capacitor and R4=10K resistor R1 = R2 =100K .......

refer this -

https://www.indiabix.com/electronics-circuits/relaxation-oscillator/

with regards,

Milind

 

[WidElectronics]

Applying negative feedback will not make it oscillate! Are you sure you have the inputs to the 741 the right way around.

Brian.

Yeah.... actually to pin.4 i have given -15V only, but by mistake i indicated it as -5V......

- - - Updated - - -

If it is relaxation oscillator that you want to make you need to fine tune even capacitor value even try C=1uf capacitor and R4=10K resistor R1 = R2 =100K .......

refer this -

https://www.indiabix.com/electronics-circuits/relaxation-oscillator/

with regards,

Milind

Thank you for your help...its really worth-full... i tried for these values. Now i got a square wave output of ±14V.....:grin:
I am trying to design for different values...
Thank you once again...............:smile: