B4R Question On/Off Switch?

[ilan]

hi

what would be the best way and safest way to connect a simple on/off switch to a DC 12V that should turn on the whole circuite?
so the DC 12v adapter should be connected to the switch and also to the motors and also power the arduino (with resistor to deliver 5v for the arduino)

is there any example for this?

thanx

 

[janderkan]

You cannot power the Arduino with 12v and a resistor.

 

[ilan]

You cannot power the Arduino with 12v and a resistor.

How about an relay? 12v -> 5v

 

[ilan]

Btw i read that u can use up to 20v to power the arduino but it is not recommended to put more then 12v

6 to 20 volts

The board can operate on an external supply from 6 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may become unstable. If using more than 12V, the voltage regulator may overheat and damage the board.

 

[CurryFrancis]

Plz read this discussion https://www.b4x.com/android/forum/threads/led-switch-on-off.137157/results/. Hope you find your answer here.
Have a nice day to all the members

 

[f0raster0]

In my opinion using +12V to power the motor and the arduino will create issues.
Don't know if you can get in your local store a LM7805, that option could be the simpler solution for your circuit.

 

[Filippo]

hi

what would be the best way and safest way to connect a simple on/off switch to a DC 12V that should turn on the whole circuite?
so the DC 12v adapter should be connected to the switch and also to the motors and also power the arduino (with resistor to deliver 5v for the arduino)

is there any example for this?

thanx

View attachment 129904

For my arduino circuits I use such a similar voltage converter:

 

[Cableguy]

You should consider having 2 PSUs, one for 5v Logic and one for 12V hardware.
The Switch can manage both.
If im not mistaken, a DPST Switch would bé petfect for you