question about powering motor modules

Other Hardware Motors, Mechanics, Power and CNC
1

first of all im an electronics newb so bare with me
is it possible to power multiple tb6612FNG modules from a single rechargable 9v battery?
im doing a project and im modding a toy firetruck and i want to make the crane controllable from arduino
im using one tb6612fng to control the firetruck itself (back wheels and steering) and other 2 to control the 3 motors of the crane
i am not intending to move the crane while movingb the truck, so i dont think this should be an issue?
any help will be greatly appreciated

Untitled Sketch 3_bb.png
Untitled Sketch 3_bb.png1173×1101 110 KB

2

I have not looked at your image as its title suggests that it is a picture of a program. Please don't post pictures of text. Just copy and paste the text. And to make it easy for people to help you please use the code button </>

so your code looks like this

and is easy to copy to a text editor. See How to use the Forum

The answer to your question about the battery depends on exactly what sort of battery you have in mind. The small PP3 style 9v batteries are not suitable for motors.

Assuming the battery has sufficient capacity then you could power several motors from it.

...R
PS ... Very nice crane in this RMWeb link - follow down and see the videos

3

You need a battery capable of supplying the current required by all the motors running at once, under load. What is that current?

4

andrewcat12:
first of all im an electronics newb so bare with me
is it possible to power multiple tb6612FNG modules from a single rechargable 9v battery?
im doing a project and im modding a toy firetruck and i want to make the crane controllable from arduino
im using one tb6612fng to control the firetruck itself (back wheels and steering) and other 2 to control the 3 motors of the crane
i am not intending to move the crane while movingb the truck, so i dont think this should be an issue?
any help will be greatly appreciated

Lose any idea of using a small 9V battery to power motors, they are low current batteries simply not up to
the task of driving motors.

LiPo, LiFePO4, NiMH, SLA, alkaline are the main options, a reputable brand with a datasheet in which you
can check the max current rating is always a good choice. Some people use a set of AA NiMH or alkaline,
less issues with safety than lithium packs, SLA is heavy but good current ability, lithium are best performers
usually.

5

jremington:
You need a battery capable of supplying the current required by all the motors running at once, under load. What is that current?

as i said im not gonna be running multiple motors at once, only one at a time
if thats still an issue, how do i determine the current required by a motor?

6

Robin2:
I have not looked at your image as its title suggests that it is a picture of a program. Please don't post pictures of text. Just copy and paste the text. And to make it easy for people to help you please use the code button </>

so your code looks like this

and is easy to copy to a text editor. See How to use the Forum

not a picture of code mate, this is a technical question

7

andrewcat12:
how do i determine the current required by a motor?

  1. Read the motor's specification/datasheet or
  2. Connect it to a power supply and measure the current taken or
  3. Post details of the motor or at least a close-up picture here and take our best guesses

Steve

8

andrewcat12:
not a picture of code mate, this is a technical question

Then please make your picture visible in your Post. See this Simple Image Guide

...R

9

Robin2:
Then please make your picture visible in your Post. See this Simple Image Guide

...R

thanks, im pretty new to this forum thing

10

slipstick:

  1. Read the motor's specification/datasheet or

no datasheet, since its some old toy car

slipstick:
2. Connect it to a power supply and measure the current taken or
3. Post details of the motor or at least a close-up picture here and take our best guesses

Steve

but i'll try this whenever i get on arduino, thanks

11

andrewcat12:
first of all im an electronics newb so bare with me

I'll keep my clothes on, thank you. Perhaps you meant "bear with me?" :slight_smile:

is it possible to power multiple tb6612FNG modules from a single rechargable 9v battery?

No, even rechargable PP3 batteries are low current (although you might get away with one
small motor, multiple means proper high current supply is needed