The only difference is that the one you show has some filtering with it. Since you will use a DC-DC convertor to change the voltage down to 5V, that will do the filtering for you. No need to filter prior to the DC-DC convertor
Thanks, i checked with the sensor spec , it is 12v dc so no need to go to 5v
You wanted to install a Wemos though didn’t you? They will turn to smoke with 12V. They only accept either 5V or 3.3V (using different connections).
You are right so i need a 5v dc gate sensor. Outdoor
So what is the best way to convert the 12v ac to 5v dc
And which sensor you recommend for 5v dc on iron gate
No. The sensor / switch has zero smarts in it. The voltage rating on it is simply a maximum that the manufacturer has specified.
Please provide a photo of the gate location you wish to install the sensor. It’s too hard to specify a part without knowing the gate design.
Perhaps something like this.
It looks ok , but i don’t think it is for outdoor.
Hi, i saw it.
It need 12v according to what i am understand
No, as I said previously, that is the maximum rated voltage. A reed switch does not require power to operate. It will work fine at 5V