You can submit one of your existing projects into a Challenge in one of two ways:
1. Go to the Challenge's page and use the "JOIN THE CHALLENGE" button to select one of your existing entries.
2. Go to your project. Select Edit Project and go to the Tag section. From there, enter the contest's official hashtag (e.g. #qualcomm-robotics)
Note: You can find the Official Challenge hashtag on the Challenge's page.
To participate in the Challenge, your Entry must be viewable! Make sure to keep the Privacy settings to "Public"! Learn more about Project Visibility