I once built an elevator for a vacuum robot in my old dorm which had two floors. The elevator was moving twice per day to each floor. Was as cheap as buying a s

I once built an elevator for a vacuum robot in my old dorm which had two floors. The elevator was moving twice per day to each floor. Was as cheap as buying a second vacuum robot. Video of the device in action: https://youtu.be/F_gTlU9w7dQ https://youtu.be/F_gTlU9w7dQ Image documentation of the build: https://imgur.io/gallery/y1dB4zr https://imgur.io/gallery/y1dB4zr