Newb here, I've connected an 3.5V Arduino Pro Mini to a BMP180 barometric sensor,
now I need to figure out how to connect one continuous rotation servo to everything,
so the servo performs two distinct tasks (different rotations) depending on the altitude
sensed.
Servo might need a separate power supply than 3/5V, depending on what is purchased.
Can anyone point me to a similar project or wiring diagram?
Also, servo recommendations for this project would be good also.
Write a short program to get the data from the sensor and figure out how to change the value in a variable depending on whether you are above or below the threshold prssure.
Write another short program to move the servo depending on the value in some variable.
Davisolzoe:
Servo might need a separate power supply than 3/5V, depending on what is purchased.
Very few servos will work properly with just a 3.3V (or 3.5V) power supply.
Here are a couple servos I use in a lot of my servo projects.
HX12K metal gear servo. This is one of the easiest servos to convert to continuous rotation. If you save the parts you remove, it's possible to convert them back to normal servos without too much trouble.
I also like the HXT900 micro servos. These are strong for a 9g servo and they have a full 180 degrees of rotation. These aren't as easy to convert to continuous rotation.
You can of course purchase servos which have already been converted to CR. Unfortunately the ready made CR micro servos don't have very good speed control. Apparently a modified HXT900 works much better than the FS90R.
I haven't found any servos which don't work fine with 3.3V logic.