However, for [Narongporn Laosrisin’s] homebrew build, they decided to go with gesture control instead. The MeArm robotic arm is built using laser cut acrylic parts, and can be had in a kit if so ...

As [Norbert Zare] demonstrates in his latest project, you can actually achieve some fairly impressive gesture control on your computer using a $10 USD PAJ7620U2 sensor.