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what servo's should i use with PICAXE-40X2 micro (3V) and what battery voltage?

hello i recently buyed PICAXE-40X2 micro (3V) and i would like to know how many batteries should i use and what servo. thanx

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ok thanx :)

ok that sounds nice thanx for the drawing but what if we want to install another sensor that uses for isstance 6v


Same thing.

Just connect the signal wire from the sensor to the correct input in the microcontroller.

connect all the minus/black/grounds together.

connect the positive microcontroller voltage to the microcontroller.

connect the positive sensor voltage to the sensor.


Use the same diagram as above just write SENSOR where it says SERVO...


Try something like this:


connect all the minus/black/grounds together.

connect the positive microcontroller voltage to the microcontroller.

connect the positive servo voltage to the servo.

connect the Yellow or White signal wire from the servo to the output pin on your microcontroller.


And if blue smoke appears, you can always blame 8ik or MSPaint

I d like to ask u smthng else u said every1 have another Board which have v2( i have read about v2 and i know what is now) but  at the Picaxe site there isnt 1 for My chip PICAXE-40X2 micro (3V), so do u know where i can find it??

I understand fully ur Explain above, Thnx

to rik

QUOTE: ___________________
I just compared the two manuals you linked. Linking your manuals in your forum post is always good. Keep doing that.

The board you bought is very different from the one I have and most of us here have. That's causing extra confusion. Your board (axe022) does not have any facilities for a second power voltage. And the manual for it does not explain what to do with a 3 Volt version of the micro controller. 

I assume you are not using the LM7805 voltage regulator (or any other regulator). So you must rely on your batteries to provide exactly 3 V for the controller. Three AA rechargeable batteries may be a little over 3 V. Two may be a little under 3 V. Check for yourself what is the best choice. Start safe, start with just two. Make your controller work first. Worry about the servo later. Make sure you can program your picaxe and program a pin to go from high to low and back. Use an LED or a multimeter to prove you're successful.

Celebrate at this point and understand what you've just done. Only now start worrying about the servo. 

As for the servo. It has three wires. One is the signal wire. Hook that up to the servo pin on the controller. It will feed the pulses (3 V) into the servo logic inside the servo case. The other two wires are ground and V+. Connect these to a separate power supply of 5 Volt. four AA rechargeables will be enough. Five of them will not damage the servo either. 

Finally, make sure to connect the negative wires from both power supplies to each other. This is called a "common ground". This makes sure that the 5 V supply really is exactly 2 V higher than the 3 V supply.
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:) sounds good can u draw a simple circuit (about how to connect srvo;s) ? if not thats ok you already helped alot
Cant u just saw me the correct way cause i have said im a bit new with the Robot. I only have work on other circuit.
So u mean to conect the +V (positive) to 6volt bat, the info with the Chip (40x2 3v { i mean in the corect position as manual says}). Now about the ground u mean to connect it to 6volt bat?
Why don't you draw me a circuit as you think it should work. I will just nod or shake my head at my computer.

You should be able to drive the input pn of the servo directly with the 40x2, The +V pin on the servo goes to the + on a separate pack of 4 AA batteeries and the gounds of bothservo and the PICAXE are tied together.