Testing a 74HC4051 The 74HC4051 is an analogue multiplexer / de-multiplexer IC. To this this IC, an Arduino Uno can be used by hooking it up with two 74HC4051 ICs. The first one is used as a multiplexer, the second one as a de-multiplexer.
From the wide range of vehicles available, picking the right one for autonomous drive is as important as picking the rest of the components. But which one is the right one?
If speed is not an issue, and you want to look your robot car like it can actually see and think, than this method is surely a very satisfying one.
As an alternative to the 3 wheel robot, an RC controlled car with multiple HC-SR04 sensors, is the next best thing to try out.
With all the testing done, it’s time to put all the gathered knowledge together, and build the final product: a self-driving-obstacle-avoiding-smart-robot-car, with display and illuminated encoder button. If it works as great as it sounds, it is an awesome machine.
Having a rotary encoder with RGB illuminated push button, gives a nice feature to the project. The speed of the car can be controlled, and a start/stop state can be set and viewed with the illuminated push button.
Having some kind of informative feedback from the autonomous vehicle can help a lot during debugging and fine-tuning. However, the serial monitor is not really an option once the vehicle is driving around. But a display turns out to be a very nice solution.
With so many information available, it’s sometimes hard to figure out where to start best. Are the tutorials you are using complete enough to get started properly, yet simple enough not to get lost as a newbie? Allow me to point you in the right direction.
Tiny tutorial about the PWM pins on the Arduino Uno, with timing diagram and sweep sample code
Making a driving vehicle avoiding obstacles using HC-SR04 sensors, turns out to be quite challenging. But despite the shortcomings of this hardware, it is achievable in a certain environment.