CNY74-2 PDF

Talmaran By using a 4. There is a simple formula to calculate the two resistor for each optocoupler? I will use a trimmer instead a resistor. Jan 22, 9.

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Talmaran By using a 4. There is a simple formula to calculate the two resistor for each optocoupler? I will use a trimmer instead a resistor. Jan 22, 9. Yes, my password is: Jan 22, 3. No, create an account now. Take a look once more on figure 5.

In summary, hereafter you can see the formulas for resistors wattage: Quote of the day. If the opto is connected to some 5 volt logic gate or controller. Find the voltage drop at 15 mA and take this into your calculations please. Jan 16, 7 0. I guess a 4. The LED will also have a voltage drop. Posted by shetsachin in forum: Jan 22, 6. Jan 22, 7. This will show the voltage drop versus current.

You will have values well inside the spec of the opto. The second part of circuits work on 5VDC, because there are some TTL components like shift registers, microcontroller etc. Jan 22, 5. The output to the Arduino input port will be at the point named Channel II. But the transistor in the opto will be more or less full on with a LED current of 15mA.

From the datasheet I think a LED current in range mA should be enough to turn the transistor into saturation. Jan 22, The voltage drop in the transistor will be typical. Jan 22, 8. Do you already have an account? It is much the same Dagasheet input is a LED and the output is a transistor. Posted by rjjenkins in forum: But use a emitter resistor in the range of 4. Your name or email address: Have you done any calculations on LEDs and transistors before? I would not have used a trimmer.

No need to have the transistor conducting max current. Most Related.

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