I made a TRIAC dimmer circuit using this reference,
it works very smoothly without snaps-on, but the C1 timing cap. has to be 100nF exactly, if it turns below some points like 85nF, then the lowest point of POT cannot turn off the TRIAC perfectly, for instance, in my work, I bought some 100nF cheap MKT cap. which were 82nF in real and at the lowest point there is still 50V on the load which is undesirable, if I use 150nF caps then the TRIAC triggers at 50% of POT which is again not good, I know I can buy better caps to overcome the problem but the question here is how to change the circuit in some way to be adaptable independent of the C1 timing cap? I mean is there any practical way to adjust the off point of TRIAC with some like POT or something else?
appreciated of your informative answers.
it works very smoothly without snaps-on, but the C1 timing cap. has to be 100nF exactly, if it turns below some points like 85nF, then the lowest point of POT cannot turn off the TRIAC perfectly, for instance, in my work, I bought some 100nF cheap MKT cap. which were 82nF in real and at the lowest point there is still 50V on the load which is undesirable, if I use 150nF caps then the TRIAC triggers at 50% of POT which is again not good, I know I can buy better caps to overcome the problem but the question here is how to change the circuit in some way to be adaptable independent of the C1 timing cap? I mean is there any practical way to adjust the off point of TRIAC with some like POT or something else?
appreciated of your informative answers.