Doorbell- bypass jumper? Help!

Hi all,
I have a wireless Heath/Zenith doorbell. It has a wireless button (battery) and plug in doorbell chime. It is model SL-6166, very common design. It works fine with the wireless button, but I am working on a different project, and need to figure out how to "manually" use a jumper wire on the circuit board of the chime itself to make it go off. I need to know how to trigger this chime with a jumper so that I can connect 2 wires to the chime from one of my home automation devices (an I/O Linc) so that the home automation can trigger the chime by sending a "closed" or jumper the two points on the chime, to make it go off. For this project, I can't use the wireless doorbell button to trigger the chime. There is a good picture of this board at: http://forum.allaboutcircuits.com/attachments/wireless-doorbell-sl-6166-rcvr-cu-jpg.37346/
That is someone else's post with a different question, but it is the exact unit I am trying to figure out.
I don't have enough technical knowledge to know where to jump this circuit board to make this door chime go off manually. I hope one of you can please help me do this?
Thanks in advance!

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nt6 (author) 2 years ago

Well Downunder35 and Kiteman, I would NOT give up. Even with my rusty knowledge of circuits (not since high school) I knew that once the RF was received, all it was doing was "switching" to allow the circuit to continue and play it's chime. I finally found that if I jumped from the little green board #3 pin soldered to the main board (with the black dot on it) to the "J5" next to the +speaker wire on the main board, it would chime. The problem is it would only do it about 75% of the time. When it didn't work, it did nothing. Then, after a while (2 hours), it stopped working all together. So, the bottom line is this is NOT working, and even though I did technically get it to chime manually by jumping it, it wouldn't last. I probably blew out a diode or something. I thought you might want to know how it ended up. Thanks to all.

nt6 (author) 2 years ago

Thanks for the replies, I can't see anything written on the black chip. I can't find a schematic anywhere online for this thing, which is ridiculous. I thought the same thing, that I could just prod around and hopefully find a way to jump it, but nothing. It will still work with the wireless button. There has to be a way to jumper this thing manually. It's probably staring me right in the face, and I can't see it.

Even if it staring at you, without the right signal a jumper won't do the trick.

The main reason for making it so complicated is to prevent the bell from going off unless there is a real and matching signal coming in.

Get a 5$ wired door chime and connect that to your home automation, I am sure noone would mind having two bells ;)

And as I said you can get them as models with both wired and wireless activation.

These things usually consist of three parts:

1. Power supply, very simply by using a capacitor and a resistor.

2. The melody making electronics - often a seperate circuit board with a black "blob" on it.

3. The radio circuit - usually the leftovers on the circuit board.

In the good old days the receiver part was just that, something that reacts to a signal from the antenna and "closes a switch" so the thing makes a sound.

Our modern variations, like yours, do basically the same, only difference is that they expect a PWM signal from the receiver.

With a bit of luck the black chip on your board is a decoder for the signals - any chance that you can read something on that chip? In the pic it is just black...

Without more detailed info on the parts and circuit it is hard to give good advise.

Maybe it is an easier option to go for a doorbell that offers both a wired and a wireless switch, or to simply add a normal doorbell to your home automation system?

Kiteman2 years ago

I'd be tempted to just prod around with a length of wire until something goes "ding doing".