I woild like to know how can i tackle this project. I would like to have a device (ARDUINO) let say on a door and when the other device the one with the vibration get close to the arduino device on the door the vibrator motor start running. I would like to know the part need it to complete this project. Also any other tip since im new dealing with arduino. Thanks
Hi,
I'll start by asking how close is close? a foot? few inches? if feet, i'd imagine you'll need some sort of NFC, RFID or other radio comm device... if inches, a magnet and hallpot might suffice.
I would say inches.
I'm going to attaching a device to the side of the door, so when the other device is entering the door, the vibrator motor will turn on.
Any comment of which kit to buy and which parts?
I think you are saying that you have something (we assume an Arduino) on the door which is running the vibrator motor, and something else that causes the vibrator motor to run when it is brought 'close' to the door.
Do you have any restrictions on the thing that you move towards the door make the vibrator run? Could that be as simple as a magnet and a reed switch?
Im going to have an Arduino on the door with a sensor and when the other device (I dont know if it has to be an arduino too) will get close to go inside the room the motor start running on the device that is trying to get in to the room.
can the device be scanned like hand held to the sensor or would it be attached to something or someone?
Ok, the device with thr vibrator motor is going to be attach to a person. When the person is going to enter the room the person gets the vibration, is going to be like a safety device basically telling the person hey watch out. No scanning
A door is a pretty big space, so a few inches can't be so accurate unless the device they are wearing always passes the same spot( say an access keypad)
perhaps ir comm?
the device the person has an ir reciever and recieves a signal from a ir transmitter in the room/ top of door etc, to turn on the vibrator for whichever amount of time
I think the ir comm is a good idea. So, i need 2 arduino, 1 ir tx, 1 ir rx and the vibrator motor? I dont mind how big the device in the door is, but i would like the device on the person to be smallest as posible. Which arduino should i buy? Thanks
You will probably need a transistor to control the vibrator, unless it draws 20ma max then the arduino can do it
also with anything portable you will need a battery power supply
you can get like an arduino nano or even make your own board with an atmega328p that could be any shape size you want
This sounds very similar to the 'anti-shoplifter' detectors that many shops use. The approach is that there's a passive tag and an active sensor - the sensor typically looks like a couple of metal loops. When the tag passes between the two parts of the active sensor, the sensor detects it and triggers an alarm.
Perhaps you could find out how they work and produce a similar solution? The tags appear to be simple radio reflectors so might not be hard to reproduce.
Alternatively, perhaps you could use standard RFID components to achieve a similar effect.
If you want the action to be taken by the mobile unit, I'd suggest using a simple radio link to trigger that.
So the solution could consist of an active sensor in the doorway which detects an RFID or similar passive/low power transceiver attached to the mobile part. This acts as a proximity sensor. You could conceivably have more than one of these representing different things that your mobile device can respond to.
An Arduino connected to the active sensor detects the approaching RFID tag and uses a short range low power radio link to trigger the corresponding mobile device to vibrate etc.
You could probably get a simpler solution just using a very short range radio link, but I suspect you would find it difficult to get a radio link that was both reliable, and only triggered at very short range. Hence suggesting using an active sensor and passive tag for the proximity detection, and a separate communication mechanism to trigger the vibration.