Learn to code — free 3,000-hour curriculum

Oren Geva

Guitar Player, Lego Builder, Engineering Executive

Israel •

1 post •

How I Built an Android Rotary Knob with Kotlin to Help My Son Practice Piano

#Kotlin

How I Built an Android Rotary Knob with Kotlin to Help My Son Practice Piano

Oren Geva

Oren Geva 9 months ago

freeCodeCamp is a donor-supported tax-exempt 501(c)(3) nonprofit organization (United States Federal Tax Identification Number: 82-0779546)

Our mission: to help people learn to code for free. We accomplish this by creating thousands of videos, articles, and interactive coding lessons - all freely available to the public. We also have thousands of freeCodeCamp study groups around the world.

Donations to freeCodeCamp go toward our education initiatives, and help pay for servers, services, and staff.

You can make a tax-deductible donation here.

Trending Guides

Our Nonprofit

About Alumni Network Open Source Shop Support Sponsors Academic Honesty Code of Conduct Privacy Policy Terms of Service Copyright Policy