Good afternoon.
I am trying to use a TRIAC to turn on and off the mains connection to a load. This load is directly connected to the mains (without a transformer) because it is a Cockroft Walton Ioniser (with capacitors and diodes). I'd like to use the TRIAC with this configuration:where the lamp is replaced by my load (ioniser).
Is it possible?
Hello Li_ereunpisan
Is it something like this? https://1.bp.blogspot.com/_hBgprBskTTw/SNZrCk7uKuI/AAAAAAAAAUw/_haPDLiLG00/s1600-h/mainsSwitch.png
Hi because at the original post the designer used 555 , it's out put current will be enough to drive an opto triac simply , and i don't think the transistor after that required .
Best Wishes
Goldsmith
Hi jumpman
I think your opto coupler burned .
Because it's input is 12 volts with a 220 ohms resistor . i think 220 ohms i s very low for that see it's datasheet at LED specifications section .
BTW : when i saw it's datasheet , it designed for 220 volts AC , we have a safety ratio about *2 ! you should use
MOC3021 (itdesigned fo 400volts AC) not MOC3020 .
Best Wishes
Goldsmith
The MOC3020 thru MOC3023 series use a 400V phototriac output so any type can be used for 240Ac applications. And as goldsmith already mentioned, for a standard operation we must limit the optocoupler input current at 15mA-20mA, see the datasheet:
**broken link removed**
In this particular application need to increase the resistor value up to 560- 620 ohms.
I think the main problem is related to the load. In order to determine whether there is anything wrong to the circuit connections we need to test first using an incandescent light bulb (40W-60W/230V). So remove the ioniser circuit, connect a light bulb instead and do the test.
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