Robotic car

Job ID: 30714012

Budget: €250 – €750 EUR

Hello. I already have schematic for car,
but I wish there was more to solder, because most of the elements are SMD and they are hard to solder specifically for kids. So I'm wondering if we could replace some SMD elements with THT elements. And remove what is not necessary. There is another problem with ultrasonic sensors in this schematic. All ECHO outputs are connected together. I came up with a solution where we use one MOS-FET for each sensor and pull-up resistor and so we change all the outputs into an open drain. Also servo motor needs to be change in to DC motor. I need that the car is programmed via bluetooth and a program in which the car will go forward, backward, left and right. And if is it possible that you can explain what did you do? Because i will show this to some kids and i would like to explain how to do it. And must be programmed in snap4arduino.