I'm not sure I understand things well enough to formulate a decent question, but here goes...
I'm trying to make a Mains AC light dimmer circuit using the MOC3010 [1]. I decided that there might be some inductance in the lights so I opted for the example circuit in figure 12 of that datasheet [1]. I used a BTA16 as the TRIAC [2]
I did forget to put a current limiting resistor between my micro-controller and the MOC3010, but I'd have thought that the dimmer part of the circuit should still function. At present sending a square wave to the MOC3010 doesn't dim the light/load at all. The datasheet [1] does have both a high side switch arrangement (Figure 13) and the low side switch (figure 12). Should I have used the high side switch example?
I should maybe say that I have a zero crossing circuit using a H11AA1 chip, so my micro-controller is detecting the zero crossing but I'm not using a full bridge rectifier in the circuit at all. I didn't think I needed it as the light bulbs are AC bulbs anyhow. I've a small module which converts the Mains AC down to 5V DC to supply the micro-controller and that's all there is. I've been sitting on this for a week trying to find some clue as to why the circuit in the datasheet doesn't function, perhaps I have to wrong TRIAC chip?
On that thought it is a 'logic level' TRIAC so possibly I should not be using the MOC3010, but rather a simple opto-coupler with the BTA16 and forget the MOC3010. Aragh is that it I've put two devices together which don't match up?
[1]
http://www.farnell.com/datasheets/2287694.pdf[2]
http://www.farnell.com/datasheets/1699992.pdf