I am turning a Hot Wheels car into a fully functional RC car controlled by my phone.

So the goal is to get one of my Hot Wheels cars to be functional by adding motors, servos, and everything needed.

• Find the tiniest components I own since the biggest challenge will be space management.
• Design and 3D print a frame that has a steering system and holds all the components in place.
• Solder everything together and test if it goes boom or not.
• Lastly, build a website from which you can control it so there is no need to carry any controller.

• Front and backward motion through the DRV8833 motor driver.
• 45 degrees steering in each direction for better control and maybe drifting... achieved by using a 1.5 g linear servo.
• The "mind" will be an ESP32-C3 since it has Wi-Fi functions, is small, and powerful. That way control via Wi-Fi becomes possible.
• The website will be pretty basic since I can't get a specific function to work (fetch accelerometer data from phone for steering), so either 2 sliders or a joystick.
• Will include settings like:
  • Servo centre offset and limits
  • Motor limits
  • Expo throttle for smoother acceleration
  • A save button which will save the settings on the ESP32 so there isn't a need to change them every time

You can see and edit the 3d model in onShape: https://cad.onshape.com/documents/f10e87d5d1a2dad3236470ab/w/f1481a050fec03bc3c35e125/e/4facaef65102b49a36f9e8eb?renderMode=0&uiState=6a06d694dea5e7e2bb82ecd9ecd9

Here is an image showing all the connections but here are some notes too:

• On the boost converter you need to unsolder the b pad and only leave A soldered to set it to 9 volts
• All the Black wires are ground and it doesnt matter in which ground you connect it.
• The bright red wire is the battery power while the dark red is 9 volts so becareful not to mix it up and burn anything.
• The in1 and in2 doesnt matter if you reverse it same with out1 and out2 you might just need to reverse the diraction in the code.

I should also credit an amazing YouTuber which I got inspiration for this project idea: @MaxImagination

Go check his other projects: https://www.youtube.com/@MaxImagination

Feel free to download everything and modify it however you like!

I really want to see your modifications or improvement tips, so contact me anytime!!