i am new with the arduino and am using it at my project which is controlling an 1-10v dimmable ballast.
First i made a circuit using an omp amp to multiple the arduino PWM output.This circuit normally works but when i connect it to the ballast the lamps are not dimmed.
I measured the 1-10v input of the ballast when its only powered with 220V ac and it gives me 13V
When i connect it to the arduino and altering its out put voltage this voltage is only changing a little.
What might be wrong ?Could anyone help me?
sorry if my English are bad