arduinointegrated-circuitmicrocontrollerswitches
I have a wireless remote control for a light.
It runs with a 12V battery.
It has two mini Omron type B3F momentary ON switches (mini push-button switches).
One button is for Light ON, the other for Light OFF.
I wonder how to connect my Arduino to that switch so I can control the on/off states.
I was wondering about relays, or maybe hacking direct the board which seems pretty rudimentary (was a cheap control system).
In the picture, you can see 6 switches because it controls 3 receivers.
When we look at the internal circuit diagram of the relay it looks like the following:
I have also added one motor to show how the connections are to be made.
Vcc is the signal given by the microcontroller (one of the output pins from the Arduino). When this signal is given the SPDT switch changes state to NO. This completes the circuit and the motor will rotate.
Note Vcc is just a 5v signal if from the microcontroller (Assuming this is the rating of the relay). But Bat2 needs so supply the required voltage and current for the motor to run.
Now moving onto what you want to achieve in your project, the description is vague. You are running 2 pairs of motors with 4 Relays. I presume each pair is controlled by 2 switches. One for moving forward and one for moving backward. The same for the other pair.
The circuit diagram looks like the following:
Truth Table: U1 - M1 and M2 Forward
U2 - M1 and M2 Backward
U3 - M3 and M4 Forward
U4 - M3 and M4 Bakcward
U1 and U2 - Nothing
U3 and U4 - Nothing
All other combinations can be inferred as M3 and M4 are isolated from M1 and M2. You have to make sure your battery can handle running all 4 motors at once though.
I'm not sure of the distinction you are trying to describe. The 6mm x 6mm tact switch you show and the microswitch both have an audible click when released, and in both cases it will likely be a bit later (some milliseconds) than the N.O. contacts opening.
In the first case it's caused by the internal metal dome contact oilcanning back to the rest position and in the second case it's probably caused by the N.C. contacts slamming together. Here is what the contact inside the tact switch looks like (from this website) - the mark in the middle is where the button presses on it to oilcan it downward and make contact:
The "tact" in the tact switch name is from the tactile feedback it gives you, unlike a membrane switch sans dome which provides no feedback. Many modern membrane switches incorporate a metal or plastic dome that gives you feedback, and in that sense they are much like the tact switch.
One generic term is "snap action". But maybe @SteveG is right and you are conflating the relatively loud door latch snap action with that of the interlock switch.
If so, its not a characteristic you will find in a common inexpensive component, it's a separate mechanical contrivance and just happens to carry the switch operation along for the ride.
Best Answer
Get your multimeter and find out how the switches are connected and if they are pull up or pull down. Also measure the voltage. So if a switch does a pull up to 5V you can just connect your arduino and output a HIGH. If its a 12V signal or sth that isn't supported by the arduino make the arduino turn on a transistor which then switches 12V to the switch. Vice versa for a pull down.