botdemy

Basically you have to have ultrasonic sensor check supersedes line following:pseudocode:if ultrasensor value < some distance (maybe 10cm) { stop; }else { line following code here}

The final version took about a week, working couple hours a day, since it went through 3 iterations of design changes. If I were to do this over again following this instructable, this would probably take about 3-4 hours excluding setting up Retro Pie.

Wow! Thank you for checking everything out and all the recommendation you have made. I will definitely incorporate those changes on my next version.

Wow! Thank you for checking everything out and all the recommendation you have made. I will definitely incorporate those changes on my next version.

Thanks for the idea but I think cardboard probably would not support CRT's weight.

Hi,1) I'm directly driving 64 neopixels with 5V on Uno. I am aware of current limitation on the pin but I am running neopixels at 10%-20% of intensity/brightness and I'm also purposely using single colors - red or blue - to limit current withdraw (and not mixing RGB colors). As part of the test, I turned on all 64 with 32 red and 32 blue and that didn't fry my Uno. 2) Uno has a built-in 5v regulator so it can accept 9v. This is a project for kids so I like to keep it simple by using 9v battery holder with 1/4 plug that plugs directly into Uno. (no on/off switch). 3) For the buttons, I'm using "pull-up" mode in code that uses internal pin resistors. Here is more info on pull-up from the Arduino website. https://www.arduino.cc/en/Tutorial/DigitalPins"There are 20K pullup ...

Hi,1) I'm directly driving 64 neopixels with 5V on Uno. I am aware of current limitation on the pin but I am running neopixels at 10%-20% of intensity/brightness and I'm also purposely using single colors - red or blue - to limit current withdraw (and not mixing RGB colors). As part of the test, I turned on all 64 with 32 red and 32 blue and that didn't fry my Uno. 2) Uno has a built-in 5v regulator so it can accept 9v. This is a project for kids so I like to keep it simple by using 9v battery holder with 1/4 plug that plugs directly into Uno. (no on/off switch). 3) For the buttons, I'm using "pull-up" mode in code that uses internal pin resistors. Here is more info on pull-up from the Arduino website. https://www.arduino.cc/en/Tutorial/DigitalPins"There are 20K pullup resistors built into the Atmega chip that can be accessed from software. These built-in pullup resistors are accessed by setting the pinMode() as INPUT_PULLUP. This effectively inverts the behavior of the INPUT mode, where HIGH means the sensor is off, and LOW means the sensor is on."Hope this helps.

Thank you for your vote!

The above video is made with 6V motors.

See the video with 4xAA NiMH cells. It is walking. :)

yes

ditto

ditto. with esp8266, the cost would be < $10.

RPi Zero W looks promising and I will definitely use it for more advanced projects such as using camera and computer vision. That being said, you still have to add an SD card and a console cable to do the initial configuration so cost goes up to $25.

I'm not sure what type of Adafruit motor shields you have but I believe adafruit has a good tutorial on how to use their products. Adafruit may even have a library so you could use the library and their functions in your code. Basically you have 6 pins to control: left +, left -, left pwm/ena, right +, right -, and right pwm/ena. If you're not going to use PWM, set PWM/ENA pins to always high. (Mine came with jumpers to set them always high). If you do that, you now have 4 pins to control - 2 for each motors. Just play with the code until it works. That's the best way to learn.

Looks similar to YL64. It has S0-S3 for input and OUT for data. Not sure about the LED pin. Could be same as E0. You'll just have to test it out.

That explains why I cannot get this to work in cicuits.io. :) In circuits.io, transistors are perfectly identical so they both conduct at the same time.

That's a cool project!

You will have to figure out on your own. That shouldn't be too difficult. Basically, your main loop has to check 3 sensors (2 IR and 1 Ultransonic) for their values and decide what you want to do. For example, below is another version I have worked on. It checks for all 3 sensors.

One way to debug your issue is to try controlling the rover (go forward, turn left, right, stop, turn of/off light) without using remote; just using the program itself. If that works, then you move onto adding a remote control and try to figure out what's going on with remote communication.