H11AA1 Vishay Semiconductors Transistor Output Optocouplers Bi-Directional Input datasheet, inventory, & pricing. H11AA1 Transistor Output Optocouplers are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for H11AA1 Transistor Output. H11AA1, H11AA3, H11AA2, H11AA4 Rev. H11AA1, H11AA3, H11AA2, H11AA4 A. C. Input/Phototransistor Optocouplers. H11AA1, H11AA3, H11AA2.

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H11AA1 Optocoupler

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyh1aa1 that your continued use of the website is subject to these policies. The pin should be 5V normally, and when H11AA1 sends a signal, it connects the arduino input to ground.

So the answer is: Alexander Sandy Hapgood h11aq1 How is this ic working directly with AC. Please let me konw if you read the same. Hmm, so the led conducts more like around 7. Seems to me that you’re using this one by mistake. That should solve the heat problem. This time the current would be the same, but the voltage across each would be half. Working with VAC is not recommended unless you really know what you are doing.

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I’ve implemented a light dimming circuit that uses a H11AA1 for zero cross detection for the SX microcontroller.

H11AA1 product information

Alexander Sandy Hapgood Posts: If you were running LEDs from logic voltages you would always take the forward voltage drop at the rated current into consideration however. If you replaced each 15k resistor with a pair of 30k resistors, in parallel, the wattage for each resistor would be halved to.

However, it is a positive or rising signal. I was still not getting an interrupt due to a zero crossing. The scope is showing 16ms separation between the signals. By the way, this circuit is designed for VAC 60Hz.

Buy online H11AA1 Optocoupler in India at low price from DNA Technology, Nashik.

Any thoughts on the noise in the scope shots? In your circuit the peak current will be the peak of the AC line, maybe V across 30K or around 5mA. My calculations indicates that this circuit should h11qa1 fine. Sign In or Register to comment. He explain it very good.

I should be getting 8ms intervals right? Very nice signal, but low amplitude.

So the ac line must be The H11AA1 led won’t conduct the needed current to excite the opto and turn on the transistor until v? By using h11aa site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.


Does anyone have an Arduino reference that states what voltage levels result in logic high and low, and trigger interrupts? Sign up using Facebook.

H11za1 works out to 50K total resistance. Ac Darn phase drifting Just like you use a Variac or a fan speed adjustment. This means the led conducts thus turning the output transistor ON for the majority of the time, it turns on and off near the zero transition, not the peak.

Hi, Check this link in you tube.

To study the nature of randomness in a digital processor network using the same clock source, 54 prop chips were all connected to a master prop. This might be an issue with the scope set up. You just made my day!! I also see that in the youtube video posted above. I would be more inclined to use larger resistors or a capacitor plus resistor or even 4. I took this circuit from this website: And so, by your comment In science there is no authority.

If we do some very rough maths Before the n11aa1 will conduct at all? Ahh, middle of the peak, means my timing is hz.