What i need in order to rotate 60° right and then 60° left (back) ?

Using Arduino Project Guidance
1

Hello , i will have some windows at my project and i will need a solution to open and close them , wich is the cheapest solution ? thanks !

I was thinking a motor which will rotate left-right and the next time it will be triggered it will rotate right-left.

2

Probably a stepper motor or a servo

3

jerseyguy1996:
Probably a stepper motor or a servo

this for example ? Servo - Generic (Sub-Micro Size) - ROB-09065 - SparkFun Electronics and it needs 1 pin to control its direction ??

thanks

4

invader7:

jerseyguy1996:
Probably a stepper motor or a servo

this for example ? Servo - Generic (Sub-Micro Size) - ROB-09065 - SparkFun Electronics and it needs 1 pin to control its direction ??

thanks

I am confused. Are we talking "windows" as in the windows in a house......i.e. the things that typically require a reasonable to significant amount of force to open and close? If so, that servo won't even come close to having the torque needed.

5

sorry i didn't mention it , windows will be made of cardboard or something very lightweight... so i imagine how move them back and forth, or up and down....somehow...

6

Hi, If you're talking about real windows, look at automobile window motors and mechanism. Buy from Auto supply companies or scrap yards. 12V at 3 to 5 amps, maybe more at starting transient. You could control with relays.

For Arduino Power Control info see the INFO on the ArduinoInfo WIKI here - http://arduinoinfo.info

See: http://arduino-info.wikispaces.com/ArduinoPower

If they are really light, large servomotors like these should work: http://goo.gl/DHvUT

They have 7 inch-pounds of torque. Test to see what forces you really have...

DISCLAIMER: Mentioned stuff from my own shop...

7

terryking228:
If they are really light, large servomotors like these should work: http://goo.gl/DHvUT

They have 7 inch-pounds of torque. Test to see what forces you really have...

Yes they will be very light , so a servo like this will work ! thanks ! how many pins does it needs ? (i hope 1 , i hope 1 , i hope 1.... etc..)

8

invader7:
Yes they will be very light , so a servo like this will work ! thanks ! how many pins does it needs ? (i hope 1 , i hope 1 , i hope 1.... etc..)

A servo needs 1 pin for control, plus ground and power. Here is a howto on using servos: Make: Projects

You might be able to control a small hobby servo powered by the 5v pin on the Arduino, but as you get to more than 1 servo, or servos that need more power, you should wire up the servos with external power (make sure you connect the Arduino and external power grounds). Here is a tutorial on wiring up servos: http://rcarduino.blogspot.com/2012/04/servo-problems-with-arduino-part-1.html

Since a servo is 0..180 degrees, I would recommend makng 90 degrees the '0' point, and then you can go from -90 to +90 from that point, by adding 90.

9

MichaelMeissner:
Since a servo is 0..180 degrees, I would recommend makng 90 degrees the '0' point, and then you can go from -90 to +90 from that point, by adding 90.

Thanks for your answer !! its great , i undestood it :slight_smile: the most importan was how many pins i will need , 1 pin is the best to hear ! how they work i will find it when i order them

10

I forgot to mention, buried in the servo documentation is the warning that on UNO's, the servo library turns off the PWM functionality of pins 9 and 10, no matter whether there is a servo on those pins. I have an LCD shield that wants to use pins 9 and 10 as PWM pins, and it is incompatible with using servos.