Analogue In - IO from Scratch - Part 2

I have joked in the past that I prefer to stay as far away from analogue signals as I can, but sometimes we want to deal with the real world. In this video I continue my new series on interfacing to look at reading in an analogue signal. Here we use a technique common in early gaming systems using general IO lines and a 555 timer in monostable configuration to read potentiometers. I finish of fully implementing a PC analogue joystick into the build with only a few basic components.

0:00 Introduction 1:19 Start with a potentiometer 2:37 555! 4:01 Principle test 5:05 the bit where I Turning my homebrew cpu into a basic clock circuit 6:33 First Test and troubleshoot 8:12 Creating a reading 9:34 Working Analogue Input 10:57 Connecting a Joystick 12:43 Reading both axis 15:45 Both axis working 17:02 Connecting the buttons 17:19 Fully working joystick! 17:54 Outro

EEVblog’s video on “How an Analog PC Joystick Works” https://youtu.be/hMBbnWjbUAU
Making the Joystick-Dupont adapter https://youtu.be/YcCYVFSQkg8 ... https://www.youtube.com/watch?v=opMBLNDWdWQ