In the last days I once again tinkered a bit. Certainly more bad than good, but where are no professional tools, there won’t be high quality. But the ultimately goal was not a professional product, but rather a simple and cheap solution. But what is it all about?
The product of my tinkering is a low-cost GSM door opener. That is simplified a small device, that opens your door when you call it and may bring the costs next to nothing. And now a little about the implementation …
Anyone who wants to get an overview about the project, can view the following video, which I made from the final product.
To build a similiar application you need the following components:
- Nokia 6230i
- 12V relay (a 5V relay would be better, but I had none)
- Connector strips
- A few wires
(Sure this is not a perfect solution and every electrician would probably split me in thousand pieces, but for a feasibility study, as this project is, it is sufficient.)
Last but not least, Iset up the Nokia 6230 in that way, that only participants from the just created caller list can trigger the “vibration motor”. This ensures that only approved people can address the relay and thus open the door.
In the final step, the relay has to be connected to the switch located on the corridor to open the front door. Once this is done, the absolute low-cost door is already available for use.
What do you think of the project? Have you also ever implemented something like this or even thought about it?