Triac Driver Circuit
Triac Led Driver
Hi All, I am new in the field of large loads (well actually quite newbie on anything electronics) but I would like to ask if someone can take a look at this schematic and see if it works, what elements are not needed or needed that are not in the schematic. Quick Questions: • Why Use an opto-triac that controls another triac? Why not only the opto triac? • Would the zero crossing be automatic? Meaning that every pulse I send from the control the opto triac will wait for the zero crossing to turn it on for the given duty cycle? • How would you control from the Spark how much of the AC phase will be allowed thru the triac? With an analogWrite (PWM) or do we need a more specific PWM command to set the duty cycle?
Moc Triac Drivers For Macbook Pro
Sorry for all the questions. Hi, Here Are the answers to your q’s 1 the power handling capacity of opto triacs is generally to low for real loads. There are components available from eg Sharp that combine the the two in to one chip. Another solution might be a Solid State Relay. But that is basically the same what you wnat to make, only more expensive. An opto triac is in fact an opto diac, a diode that trips both ways (no pun intended) at a certain threshold.
This means that it will fire the triac when it is the right moment. The on chip circuit takes care of the switch timing. 3 Okay phase control. Zerocrossing devices don’t allow that. They switch at zero. Phase control works like this: you need a zero crossing detector circuit like this or something like that. Feed the output to an interrupable input pin of the spark.
MOC3031M, MOC3032M, MOC3033M, MOC3041M, MOC3042M, MOC3043M 6-Pin DIP Zero-Cross Optoisolators Triac Driver Output (250/400 Vol t Peak) Suggested method of firing two, back-to-back SCR’s with a Fairchild triac driver.
Attach a function to the pin that counts between 0 and 30 or 25 milliseconds. At 0 write a high to the opto pin and feed this function also with a number at which you want to stop firing the triac. When this number is reached, write a low to the opto pin. Voila you have made a light dimmer. Hi, If you want to switch heaters with triacs, the only thing you have to think of that you choose a triac that can handle the current. Let’s assume the heater produces 2000 watt of heat. This means it consumes 2000 / 230 = 9 ampere.
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