How can I use the BK7231N board and use a dry contact to trigger an open door alert? I am using board 19JWT-N. I couldn't locate the magnetic reed switch sensor among the board components. Does anyone have access to the electrical schematic of the board?

there are many similar contact sensors about. eg probably a hall sensor - Q3. eg: and

>>21870724 Hello divadiow, thank you very much for your help in answering our topic. You have a friend in Brazil for any help you may need.

BK7231N 19JWT-N dry contact open door alert wiring/configuration

Report a violation of the law

Reply | New topic

#1 21870677 25 Mar 2026 23:43

carlosbill carlosbill

Level 2

Posts: 2
Topic author

Post #1
21870677 25 Mar 2026 23:43

How can I use the BK7231N board and use a dry contact to trigger an open door alert?
I am using board 19JWT-N.
I couldn't locate the magnetic reed switch sensor among the board components. Does anyone have access to the electrical schematic of the board?
ADVERTISEMENT
#2 21870724 26 Mar 2026 07:16

divadiow divadiow

Level 38

Posts: 4869

Help: 424

Rate: 863
Helpful post? (0)

Post #2
21870724 26 Mar 2026 07:16

there are many similar contact sensors about.

eg
https://www.elektroda.com/rtvforum/topic4028193.html
https://www.elektroda.com/rtvforum/topic4026894.html

carlosbill wrote:
I couldn't locate the magnetic reed switch sensor among the board components

probably a hall sensor - Q3.

eg:
p.kaczmarek2 wrote:
By the way, it seems the same PCB is used by the door sensors. U3 footprint looks like hall sensor.

and https://www.elektroda.com/rtvforum/topic4028222.html#21331500
#3 21871511 26 Mar 2026 23:42

carlosbill carlosbill

Level 2

Posts: 2
Topic author Helpful post? (0)

Post #3
21871511 26 Mar 2026 23:42

>>21870724 Hello divadiow, thank you very much for your help in answering our topic.

You have a friend in Brazil for any help you may need.
Create an account, log in here. You will receive points by participating in discussions.
Join this discussion.

Install Elektroda application

Didn't find an answer? Ask Artificial Intelligence

*I agree to send the question to OpenAI, Anthropic PBC, Perplexity AI, Inc., Kagi Inc., Google LLC - owners of language models in order to prepare the best response. The companies may monitor and log information entered into the form.

*I agree to publicly display my question and answer. The question and answer will be publicly available to everyone. The process may take a few minutes. Upon completion, you will be redirected to the page with the answer.

Wait...(2min)

Reply | New topic

Report a violation of the law

BK7231N 19JWT-N dry contact open door alert wiring/configuration

Didn't find an answer? Ask Artificial Intelligence