![3D50 and Qt Software](http://www.digikey.cn/-/media/Images/PTM/G/Grayhill/3D50%20and%20Qt%20Software/3D50_sm.jpg?la=zh-CN-rmb&ts=98627b28-9cce-4bbd-a2cb-6079831b6ea2)
3D50 Display provides a responsive touch-screen interface for applications in agriculture and construction vehicles.
Duration: 10 minutes![Single Deck Rotary Switches](http://www.digikey.cn/-/media/Images/PTM/G/Grayhill/Rotary%20Switches/RotaryMechanicalEncoder_sm.jpg?la=zh-CN-rmb&ts=87f7b2aa-b87f-4c6d-81bc-feca0ef42b29)
Basic understanding of terminology and functions of rotary switches as well as different applications of rotary switches and mechanical encoders.
Duration: 20 minutes![Machine Interface Encoders](http://www.digikey.cn/-/media/Images/PTM/G/Grayhill/Optical%20Encoder/Optical_Encoders_sm.jpg?la=zh-CN-rmb&ts=565943b1-3000-4a1b-afd7-58a9de6e1b60)
Optical encoder key components, human interface encoders and applications, as well as a discussion around mechanical interface optical encoders.
Duration: 20 minutes![I/O Modules](http://www.digikey.cn/-/media/Images/PTM/G/Grayhill/Input-Output%20Devices/IODevices_sm.jpg?la=zh-CN-rmb&ts=d69bcf05-f069-4362-8751-fe6f5910787b)
Summary of input/output devices from Grayhill that offer a selection of both digital and analog input and output modules, racks, and bases.
Duration: 10 minutes![Rubber Overlay Keypads](http://www.digikey.cn/-/media/Images/PTM/G/Grayhill/Keypads/Keypads_sm.jpg?la=zh-CN-rmb&ts=43793b77-1940-4af4-908d-fff8d7fd109d)
Basic keypad orientation, advantages and disadvantages of the four types of keypads offered by Grayhill, and various keypad applications.
Duration: 20 minutes