I want to make a car, use the driver module, just have a piece of ULN2003 on hand, just think about whether you can use this chip to drive, check the DATASHEET, the current of each port is 500mA, I use the two ports in parallel Do a mouth control 1 motor, a total of 4 ports control 2 motors, the battery uses two 3.7 lithium batteries, do not know if this chip can work very well?
You apparently stopped reading the datasheet at the second page. There's also a diagram "Allowable collector current as a function of duty cycle". Maximum DC current with 4 ports in use is e.g. 300 mA per port.
Aside from the limit FvM mentions, that device cannot 'drive' anything. It is a current sink only but you can use it in the negative side of your motors if you supply their positive sides from the batteries.