E absolute maximum ratings at 25°C free-air temperature (unless otherwise noted)†. Input-to-output peak voltage (8-ms half sine wave): 4N kV. standard single channel phototransistor couplers. These families include the 4N35, 4N36, 4N37, 4N38 couplers. Each optocoupler consists of. Cosmo 4n35 optoisolator for DC voltage measuring. Hi all, I’ve encountered a problem. I’ve tried to set the input current to the opto by using 5V.
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Another option is to use a micro which has 8 adc inputs measure it and send it thro the opto. It would be useful to know what you are trying to measure – where the source voltage comes from.
In which case my description which I guess didn’t make sense! If that doesn’t make sense then maybe it will help to post your circuit, Keith. Thanks Post added at Synthesized tuning, Part 2: Choosing IC with EN signal 2.
cosmo 4N35 datasheet & applicatoin notes – Datasheet Archive
Stepped down to 5V of course! Losses in inductor of como boost converter 9. A crude option if you just want a rough voltage measurement would be to correct the measured value. It will only work for input voltages high enough to turnt he LED on and it will be temperature sensitive though, so it is a very crude option. On the output side, I have put the voltage to 5V and resistor as 1k.
Cosmo 4n35 optoisolator for DC voltage measuring Hurm Input port and input output port declaration in top module 2. Dec 242: So you circuit is working correctly – although maybe not how you want it to.
IC 4N35 Optocoupler
Similar Threads use of a optoisolator in a power supply 4N35 fairchild 2. If you have a high voltage available to drive the LED then the accuracy will improve although you will cosjo more power in the LED drive resistor.
I need to use 8 pieces lol.
Cosmo 4n35 optoisolator for DC voltage measuring How do I improvised it to be directly proportional, Keith? Is the opto reverse biased?
I am not sure it would be much simpler than using a to turn it into a pulse train though. Turn on power triac – proposed circuit analysis 0.
Measuring air gap of a magnetic core for home-wound inductors and flyback transformer 7.
Cosmo 4n35 optoisolator for DC voltage measuring
How do you get an MCU design to market quickly? If you reduce the input voltage the output voltage will increase.
Cosmo 4n35 optoisolator dosmo DC voltage measuring. Originally Posted by keithrs. Cosmo 4n35 optoisolator for DC voltage measuring If you have a high voltage available to drive the LED then the accuracy will improve although you will dissipate more power in the LED drive resistor.
I assume the phototransistor has a 1k collector load to 5V. Cosmo 4n35 optoisolator for DC voltage measuring Hi Keith, here is my circuit, Post added at I’ve tried to set the input current to the opto by using 5V and ohm resistor, resulting less than 10mA input current. Cosmo 4n35 optoisolator for DC voltage measuring What you have will be inversely proportional which would be fine – it can be sorted out in software – except that if you were hoping to measure input voltage in that way you will fail because of the non-linear relationship between the LED current and voltage.
Cosmo 4n35 optoisolator for DC voltage measuring I see.
The time now is