Hy
I try to create a adapter for my viesmann heating pump.
I found some tutorials, but they always use the SFH487-2 Sensor.
the sensor is not avaible.
so my question, if i can use a other sensor.
Here is the tutorial, with the wiring cricuit.
thanks for your help
Pay attention to the forward voltage, none is 5V like the SFH487, you will have to make some modification to the circuit.
The data sheet says 1.8V MAX @100mA
Thanks, corrected (I don't know what I read...) 
@jumbo125
According to the Vitotronic documentation, the receiver wavelength is at 860nm but apparently is not all that picky since the SFH487 is at 880nm.
So, I think that the SFH 4356 would be a good replacement, even better than the original
You could also use the SFH 4556 which is 5mm round instead of 3mm
You are great!
Does i need the 180ohm resistance too? It the wiring cricuit is a resistor. If yes, Can I use 150ohm
The SFH4356 is about twice as powerful as the 487 so I would actually use a bigger resistor, 200 or 220 ohms. It will draw less current from the ESP but still provide more power.
Anything between 150 and 220 will work OK
the shipping costs for the two sensors will be more than 20€ in my country. I had follow all links to any shop 
but i found a shop that will be send for 8€.
The shop has only the
SFH 4350 IR-Emitter 860 nm 13 ° 3 mm radial
or
SFH 4555 IR-Emitter 860 nm 5 ° 5 mm radial
can i use one of them or are the not correct as an alternativ?
Thanks a lot
You can use any of them.
The SFH 4350 might work.
However, it has a much narrower beam angle than the 487 so you will have to make sure it is directly aligned with the optical receiver on the boiler interface.Also use a 220 ohm resistor
Which shop did you find those LEDs. Maybe I can search them for a better alternative.
Hello
Sorry for the late answer.
I buy at conrad.at
I did not see anything better than the SFH4350.
Okay
Thank you
i have a problem with my sensor. In the tutorial the use the sfh309 fa
i got the sfh309
is it a main difference?
Can someone h
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