I am new to Arduino and electronic stuff.
Right now, trying to emulate "gate opener" remote -- with final target to make it as internet based.
I thought the sensor was "infrared" sensor, but it wasn't. What sensor is a gate opener using?
Thanks.
It could be a couple of different sensors.
It may be a coil under the road that is resonating at a fixed frequency and when the steel vehicle passes, it loads the coil and the current changes. This is then used to trigger the output.
It may also have a magnetic sensor that detects a change in the magnetic field around it.
Explain your full project and we may be able to help more.
Weedpharma
Thanks for your insight. The existing gate opener is actually already working, and I could open with a remote from distance places (looks like a remote car 4x4 cm with two buttons with one little red LED). I would like to clone this remote functionality using arduino.
It is a RF wireless remote. These are commonly available from places like Deal Extreme etc. it simply sends a signal to the receiver and it operates a relay to open the gate.
All you need is to supply a relay closure to emulate the function of the remote. There would be two relays, for open and close.
Weedpharma
Thank you Weedpharma for the clue. I really appreciate it.
Do you have any recommendation which component I should purchase for
- RF receiver (I need to have this decode existing signal?). Any sample sketch for decoding?
- RF transmitter
Herewith the RF regulation in our country for garage opener
Output power ≤ 100mW ERP
26.96 – 27.28 MHz
34.995 – 35.225 MHz
Output power ≤ ≤ 500mW ERP
40.665 – 40.695 MHz
40.77 – 40.83 MHz
72.13 – 72.21 MHz
Do a search for something like this
They are very low power with a range of about 50m.
I have used similar and used relays to trigger the switch to use it autonomously.
If you are planning to use remote control via Internet, you do not need this. Use the Arduino to control the relays that you put in parallel to the existing Rx relay.
Weedpharma
My driveway gate is remote controlled with a remote control. It is coded with an 8 bit or 16 bit code so others with a remote gate can't open it. I would have to go out to the shop to get the documentation to be sure of the code size and the radio frequency.
The control also has the ability to use various sensors to operate the gate. Since the gate is used to keep deer out of the yard, I use SPST push button switches on posts on each side of the gate for human operation. Works fine.
The OP needs to find the documentation on his gate controller and use the sensor connections with his Arduino project. Simple connection. Just needs to work on his specific remote control design.
Paul