I have the simplest triac circuit with one diac, a potentiometer and a capacitor like on this picture https://www.electronics-tutorials.ws/wp-content/uploads/2018/05/power-power24.gif . And the problem is that it fires too early at around 100volt out of 230v. I want it to start conducting at 200-210 volts. How can this be done? What additional components should I use? I use bt136 triac.