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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I calculated a current of 0. In science there is no authority. I am making an arduino controlled fan speed controller that would digitally control the speed of my ceiling fan working on VAC and 50 Hz.

Do you have a pullup resistor between pins 6 and 5? I should be getting 8ms intervals right? So the ac line must be If you limit the current to a safe value you could use the circuit at VAC as well.

Also, I attached a couple scope shots of pin 5 output and one that shows the measurements. When used with the object Whether using your original h11xa1, or the inverted connections above and the signal is too weak, change 10K to lower value, i. There is only experiment. Post Your Answer Discard By clicking “Post Your Answer”, you h11xa1 that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

The H11AA1 was giving h11ax1 1. Sign In or Register to comment. I do see the info on the first page like you cite. In your circuit the peak current will be the peak of the AC line, maybe V across 30K or around 5mA. I am still working on understanding this scope, and now have a nice 8ms signal see attached. H11aa use 10K pullup on pin 2 with pin 1 to GND If the voltage is V RMS then h11aa peak is 1.

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Given the data sheet, which is the expected behavior, and where on the data sheet do you read that? That works out to 50K total resistance. Home Questions Tags Users Unanswered. Does anyone have an Arduino reference that states what voltage levels result in logic high and low, and trigger interrupts?

Second question is if the shot showing the noise is typical of what you see on an arduino? These posts have helped to me finally figure out how h1a1a1 use the B11aa1 in my own circuit.

Thanks all for responding And so, by your comment If you were running LEDs from logic voltages you would always take the forward voltage drop at the rated current into consideration however. How is this ic working directly with AC.

AC Phase control – H11AA1 is 16ms not 8ms

Optoisolator is lit, grounding the pullup resistor, making pin low. Isn’t that a bit much for the part?

I am using the following circuit which is designed for VAC and 60Hz. I’ve implemented a light dimming circuit that uses a H11AA1 for zero cross detection for the SX microcontroller.

April 6 Vote Up 0 Vote Down. Heres the exact part datasheet from the manufacturer that I have. The max forward diode voltage is specified as 1. You have a 5. Any thoughts on the noise in the scope shots? I created a post on how the prop is connected, programmed, and debug output viewed wirelessly using the parallax wx device. I also see that in the youtube video posted above. He explain it very good. The scope is showing 16ms separation between the signals.

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I now get approximately 3V spike for the signal, and the interrupt is h11a1. I am focusing on the AC line voltage, that the transition happens at here, based on the datasheet specs of the H11AA1, and the above attached propeller circuit. Ahh, middle of the peak, means my timing is hz.

resistors connected to H11AA1 getting hot

u11aa1 My calculations indicates that this circuit should be fine. I am talking about the H11AA1 with the above propeller circuit, and not about trying to find a replacement or better part s. If we do some very rough maths Just like you use a Variac or a fan speed adjustment.

Before the led will conduct at all? Working with VAC is not recommended unless you really know what you are doing. If you replaced each 15k resistor with a pair of 30k resistors, in parallel, the wattage for each resistor would be halved to. Post as a guest Name. That should solve the heat problem. Sign up or log in Sign up using Google. Phil Pilgrim PhiPi wrote: