Looks correct.
So you have a 5 second delay when open but it never shuts off when the door is closed even after 10 seconds?

 

Here's a better mod that you will need to assemble on a small piece of perf board that should work.
Delay time set for about 10 seconds with the component values shown.

 

I was hoping not to use the 555, but it seems to me that there are no other options :-(
Don't have one to try it right away, so it will take some time to try it out.
How can I get a delay of 30 seconds, as 10 is a little on the too short side?
Oh, and thank you @sghioto for your help and patience.

 

How can I get a delay of 30 seconds

Change cap to 33uf and resistor to 820K.

 

Link to the product?

ak

Hi guys,

As we are always struggling with our refrigerator door left open I was searching the net for a solution and found a modification of a door/window alarm on Maker Corner which uses the reed switch. It was a really simple modification with a capacitor and two resistors to delay the alarm and turn the volume down. So, I bought the alarm only to found out it's a new version with a hal magnetic sensor.
It is a 6207 hal sensor connected to the yl3710 IC

My question is: is there a simple way to delay the alarm as with the reed switch?
I have attached a pic of the alarm.

Thx.

Hi, what simple solution (read: RC delay circuit) did you end up using? I also want to hack a couple of these cheapo door alarms to work on some fridge doors. A delay of about 60 seconds would work well. Thanks in advance. Gelman

 

Rather than climb onto someone else's thread, a better way is to start your own. Give some background, ask your question, and include supporting information such as product links, photos, drawings, etc. You can link to another thread for context.

ak

 

Rather than climb onto someone else's thread, a better way is to start your own. Give some background, ask your question, and include supporting information such as product links, photos, drawings, etc. You can link to another thread for context.

ak

Thanks for replying, AnalogKid. My problem is exactly the same as the OP. Logic says, why start a new thread when this one is still applicable and appears ongoing -- the thread is relatively new and hasn't been closed.

So again, my question to the OP: Because there doesn't appear to be any followup by him on his solution and appears he's still subscribed, I am asking him how he fixed his problem without using a 555 -- or did he even complete his challenge?

 

because there doesn't appear to be any followup by him on his solution

Have you tried contacting the TS through the private conversation link?
He has not been on this forum since Jan. 19 according to his profile.
As ak suggested better to start your own thread.

 

Have you tried contacting the TS through the private conversation link?
He has not been on this forum since Jan. 19 according to his profile.
As ak suggested better to start your own thread.

Ok. If no luck in getting in touch with the TS/OP, then I will start a new thread.
So please point me to the private conversation link [for that TS/OP].
And then we can delete my non-relevant replies to this thread.
Thanks.

 

So please point me to the private conversation link [for that TS/OP].

Click on the profile name and select "Start Conversation".
Not sure but you may not be able to use it until you have been a member for several days.
If not then I will try and contact him.

 

I went to his profile, didn't see "start conversation".
Thanks for your kind offer to contact him -- that will help keep duplication of Topic down.
(I don't know what I could add to a new thread, as mine would be almost identical to his)

 

(I don't know what I could add to a new thread, as mine would be almost identical to his)

Just sent PM.
Do you have the same alarm?

 

Hello,

@sghioto , Members with less than 10 posts can not start a conversation.
They can respond on a conversation that is initiated by a senior member.
More info here : Restrictions for new members

Bertus

 

Just sent PM.
Do you have the same alarm?

Yes, exact same device.

 

Then I suggest the 555 circuit as in post #22.
I don't think there's a better way.

 

Then I suggest the 555 circuit as in post #22.
I don't think there's a better way.

My last 555 was used up some time ago -- I mostly just have a heap of discrete components (old school).
No electronics suppliers nearby have any as covid has eaten their supply.

So, it appears that in order to insert a 555 the rest of the circuit would have to be essentially redone as the existing foil would probably not survive. Using a perfboard is fine for an experiment, but I suspect it won't readily fit within the original enclosure.

My hunch is that OP was close or solved to a simpler solution. But maybe not and instead just gave up on this thread??
Or maybe he'll post a reply.

If I have second thoughts or more info to provide I can always start a new thread.
Anyway, thanks for your input sghioto.

 

No electronics suppliers nearby have any as covid has eaten their supply.

What country are you located in?

 

Canada. A small remote town.

 

You can't order parts online?

 

Hi, what simple solution (read: RC delay circuit) did you end up using? I also want to hack a couple of these cheapo door alarms to work on some fridge doors. A delay of about 60 seconds would work well. Thanks in advance. Gelman

Hi, I couldn't get the 555 in my local stores so I had to order online. If my spare time permits I am planning to get things done this weekend. Will let you know the outcome.