hi... What happens if i give a constant dc voltage , say 5 V to the gate of a triac when it is connected across line supply? say if i increase this voltage to 10V , is it that the triac will start conducting only after the supply waveform also reaches 10V?
hi... What happens if i give a constant dc voltage , say 5 V to the gate of a triac when it is connected across line supply? say if i increase this voltage to 10V , is it that the triac will start conducting only after the supply waveform also reaches 10V?
If 5V is applied to the gate of a triac, it will damage the gate junction. It's like trying to applying 5V forward voltage to a diode. The diode will conduct, the current becomes infinite and the junction instantly blows. In order to prevent this failure, you must use a current limiting device in series, like a resistor.
Check the data sheet of the triac in question for triggering polarity etc. IIRC, some triacs trigger in more quadrants than others.
I wouldn't know. I just know that if I attach the probes of a DMM across a single juction rectifier diode and, with a source of 5V, I am successful at applying a forward bias voltage of 5V on the diode's anode with respect to the cathode, the diode is porked.
You can use a similar method to test fuses. Using clip leads, connect the suspect fuse in series with a 12V automotive battery. If you see a flash, you know the fuse was good.