I bought a bts7960 and connected it to a battery. If I measure the voltage of the battery with a voltmeter and the battery is not connected to the bts7960, I measure 7.88 volts.
If I try to measure the input voltage of the bts7960, I measure 2. Something volts. Why is the input voltage lower than the battery voltage?


Here is a schematic.

 

You should not be Powering this Chip until it is permanently installed in a Circuit.
If your lucky, it's not damaged.
This Chip requires Micro-Computer Control, before it will do anything.

Are you sure that you know how to use this Chip, and what it is supposed to do ?
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I was trying to get the bts7960 to turn on an electric motor, and it was connected to a arduino uno. I ran a program that was suppose to turn the motor for 10 seconds several times and the motor wouldn't turn on. I was just trying to make sure the circuit is working.

 

The most likely problem is with the setup of, and interface with, your Arduino.
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Here is a drawing of the setup


Pin 5 of arduino uno is connected to RPWM of bts7960
and pin 6 of arduino uno is connected to LPWM of bts7960. 5 volt pin is connected to positive terminal of the breadboard. The 5 volt pin is not an output/input pin. Gound pin of the arduino uno is connected to the negative terminal of the breadboard. The L_EN, R_EN, and Vcc pin of bts7960 is connected to the positive terminal of the breadboard. So what is wrong with the setup?

 

Void loop {
pinMode( 5, OUTPUT );
pinMode( 6, OUTPUT );

analogWrite( 5, 200);
analogWrite( 6, 0);
delay( 5000 );
analogWrite( 5, 0);
analogWrite( 6, 0);
}

 

This is the code I use.

 

Here is a second picture of the drawing I made, in case the first one is too blurry.