Connect doorbell

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RayAmsterdam
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Connect doorbell

Post by RayAmsterdam » Monday 20 February 2017 20:56

I want to connect my doorbell to de gpio (in) of my pi 3b. The momentary contact is connected in between the door entry unit (Golmar Platea) en mass. When the contact is open, the tension measured over the contact is 16,7V. What is the easiest way to get the signal of the doorbell as input?
door bell.png
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YellowSky
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Re: Connect doorbell

Post by YellowSky » Monday 20 February 2017 21:00

A voltage divider to get about 3V?

NStafford
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Re: Connect doorbell

Post by NStafford » Tuesday 21 February 2017 2:14

I am trying to do something similar with my door system. But I am pretty new to trying to do this set ups without someone checking up on my work.

For me, I am having issues other than the signal. But I would try the voltage divider.

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heggink
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Re: Connect doorbell

Post by heggink » Tuesday 21 February 2017 12:14

Is the 17.6v ac or dc? If dc then you should be able to use a simple up/down converter to 3.3v and connect that to the gpio pin, right? I ordered these for a different use (esp power) : DD0603SB_3V3 * 5 5 STKS Auto Step-UP
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RayAmsterdam
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Re: Connect doorbell

Post by RayAmsterdam » Tuesday 21 February 2017 19:25

Thanks for the replies. I ordered a step down converter. I'll keep you guys informed.

RayAmsterdam
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Re: Connect doorbell

Post by RayAmsterdam » Saturday 04 March 2017 19:56

Unfortunately the step down converter is not the solution. The step down converter itself triggers the door entry system, like if the doorbell button is pushed. Any other solution?

RayAmsterdam
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Re: Connect doorbell

Post by RayAmsterdam » Saturday 04 March 2017 20:10

I was thinking, isn't it simply possible to achieve this with just 2 diodes?
door bell.png
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RayAmsterdam
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Re: Connect doorbell

Post by RayAmsterdam » Sunday 05 March 2017 19:38

This is the working solution:
door bell.png
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ronh123
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Re: Connect doorbell

Post by ronh123 » Wednesday 05 April 2017 22:14

Where can I find the instructions and a diagram how to configure and connect a simple switch ( like a door bell switch without any power ) to a Raspberry PI3 and make it usefull in Domoticz.
Installation WiringPI, how to configure the pins and how to keep it in the config of the Raspberry.
Thanks

elgringo
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Re: Connect doorbell

Post by elgringo » Wednesday 05 July 2017 8:48

viewtopic.php?f=65&t=17759&p=136511#p136511 ?

Input voltage is 8 VAC (normal doorbell), if different the resistor of 1200 Ohm must be changed

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