How to proper connect Tb6612fng with a 7.4v battery

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1

Hello guys
I'm new here and I'm trying to learn more about electronics.

I have a question for you:

I'm building a RC car (you know, the car with the 4 yellow cheap motors)

So I have:

Arduino Uno
Tb6612fng Motor driver
And a 7.4v 300mah 2s 35c LiPo battery.

I have been using the L298n motor driver so nothing complicate with it, I just plug the red wire into de 12v pin and the ground into the ground pin of the driver.

But the question here is how to connect the LiPo battery with the Tb6612fng.

Should I connect the driver into the breadboard and then the battery into the breadboard as well?

I mean, I don't know if my cheap breadboard can handle that voltage

Any ideas??

Thanks in advance

2

Breadboards can easily handle hundreds of volts. Many of them can carry a big current also.

3

Don't use a breadboard with a motor and motor driver, the breadboard tracks are not intended for large currents and will probably burn.

It is best to solder motor and motor power wires directly to the motor driver, or use header pins and good quality connectors. Sparkfun and Adafruit have good tutorials on soldering.

Post a link to your motor driver module. The better ones have screw terminals for high current connections, as shown below. See Pololu - TB9051FTG Single Brushed DC Motor Driver Carrier

4

kubajz22:
Breadboards can easily handle hundreds of volts. Many of them can carry a big current also.

Where did you come up with this brilliant deduction?

5

detown:
Where did you come up with this brilliant deduction?

I've connected rectified mains voltage (330 V) to a breadboard many times in the past. I believe I've once had a current of like 2 amps flowing through it as well. I guess it cannot handle it for a long time though due to the high contact resistance.

6

jremington:
Don't use a breadboard with a motor and motor driver, the breadboard tracks are not intended for large currents and will probably burn.

It is best to solder motor and motor power wires directly to the motor driver, or use header pins and good quality connectors. Sparkfun and Adafruit have good tutorials on soldering.

Post a link to your motor driver module. The better ones have screw terminals for high current connections, as shown below. See Pololu - TB9051FTG Single Brushed DC Motor Driver Carrier

554×554 39.4 KB

Hello guys, this is the driver I trying to use

So soldering is the only way right???

7

Battery power to the VM (Voltage Motor).

5V from Arduino to Vcc.

Connect all the grounds.

A01/A02 is one motor; B01/B02 is the other.

Control signals; PWM signal for each motor.

Indeed - soldering, or DuPont connectors or similar if continuous current is <1A connected to the header pins.

8

As I wrote you guys before, I have a Lipo battery 7.4v 300mah

So the question, what about step down converter to low the voltage to 5v and connect to the breadboard??

Would that be possible???

9

Could be possible - unclear what you really want - and what are you going to use that 5V for?

10

In this case I disagree with jremington. Looking at the board the clad to the output seems pretty heavy for the current rating. So I would not try soldering to the chip leads.

The spec sheet (from the SparkFun Link) says:

  1. all grounds need to be tied together. The Negative of the LiPO's should be tied to the ground pins by the "Motor Driver" text

  2. Vcc should be the same voltage as your UNO (2.7 - 5.5)

  3. VM should be the voltage from the LiPo (2.5 to 13.5)

If your breadboard has pins already soldered to the board you can use the dupont style connectors for the UNO connections but you must solder the Lipo and Motor wires.