i am working on a project in which, i am required to drive 2 servo motors. i am having difficulty to make it a battery operated system.
i am searching for components or ways like a readily available module or component or opamp that i can use.
not enough information to formulate a reply.
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Please post links to
- 9W radio battery
- The servo motors you need to drive.
Will the servos ever move together, at the same time? Or only one moving at a time?
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Do some research on battery types and find a chemistry that will deliver that current.
Look for characteristics like internal resistance.
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Hi, @sunny_kiran_jangam
Welcome to the forum.
Can you please tell us your electronics, programming, arduino, hardware experience?
Tom.... 
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Sorry guys i am new to these forum,
Components
- Arduino Uno (as of now, in further drafts inclined to go with arduino nano)
- motors - Servo motors (Tower pro SG90 Blue Plastic) (link)
- one 9V alkaline battery.(link)
Description:
-> two servo motors are connected in parallel, controlled by PWM pin of arduino.
i am driving the 2 motors simultaneously. i am planing to create a small gimble(keeping an end effector constant) for my personal use.
first Draft:
I was trying to drive the servo motors directly through the arduino uno's 5V port. in that case, motors were not getting sufficient current and are just vibrating. then i tried 9W Alkaline Battery commonly used in radios. i want the overall form factor of my project to be very small(giving this information about size constraint).
second draft:
then, to provide sufficient current(1.5A), i used lab bench supply in which case, servo motors were working fine.
problem:
as i want the overall form factor to be small, the battery needs to be light, rechargable. so, if go with another battery chemistry also, my necessity is not satifying. i am thinking to employ a current amplifying circuit so that i am get sufficient current (i am aware of very fast discharge rate.. thinking of that too.. but for now, weighing pros and cons and preferring small form factor)
i am kind of new for electronic design, still learning. thank you all for suggesting me to be more specific. hope this time i provided enough information.
),
Good luck with that.
If you change your mind, have a look at lipo/lifepo4 batteries for RC (cars/planes/drones). They can provide high currents, even the smallest ones.
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Not advisable, as the 5V will not be able to supply the current.
Did you note the current drawn when activating the servos?
Forget about size for the moment and get your prototype running.
Can you please post a copy of your circuit, a picture of a hand drawn circuit in jpg, png?
Hand drawn and photographed is perfectly acceptable.
Please include ALL hardware, power supplies, component names and pin labels.
Can you please post your code/
Can you post some images of your project?
So we can see your component layout.
What is your project?
Tom....
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By two of these batteries and put them in series to get 7.4V
They are very thin and about the same size as an Uno.
You can put them underneath the Uno.
https://www.digikey.com/en/products/detail/adafruit-industries-llc/2011/6612469
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Show us an image or a link to the 9W alkaline battery you have tried.
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How about the link in post #6 ?
As expected, it is a PP3
I assumed that was the case, but 9W and 9V are used in the same post.
Watts or Volts?
Clearly it is Volts. It can't be 9W, @sunny_kiran_jangam is confused. 9W would mean the 9V battery putting out an Amp. We know those PP3 batteries can barely put out 1/10th that much current.
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It wasn't meant to be too serious.
The radio batteries I remember were the larger PP9.
I don't know if the OP might have had more success with the lithium version of the PP3.
It got me looking for a less weighty version of a lead acid 12V 7ahr battery for a garden sprayer.
I'm going to try 4 lithium iron phosphate battery that outputs a nominal 12.8 volts