EEVblog #1054 - How an Analog PC Joystick Works

How does a PC read an old school analog joystick?
It might be more interesting than you think.
Or how to make an ADC out of a 555 Timer...

IBM PC Jr Technical Reference Manual:
http://www.retroarchive.org/dos/docs/ibmpcjrtechref.pdf

Tandy 1000 Technical Reference Manual:
https://ia801708.us.archive.org/5/items/Tandy_1000_Computer_Service_Manual_1985_Tandy/Tandy_1000_Computer_Service_Manual_1985_Tandy.pdf

Forum: http://www.eevblog.com/forum/blog/eevblog-1054-how-an-analog-pc-joystick-works/

EEVblog Main Web Site: http://www.eevblog.com
The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2

Support the EEVblog through Patreon!
http://www.patreon.com/eevblog

Donate With Bitcoin & Other Crypto Currencies!
https://www.eevblog.com/crypto-currency/

EEVblog Amazon Store (Dave gets a cut):
http://astore.amazon.com/eevblogstore-20

T-Shirts: http://teespring.com/stores/eevblog
💗 Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3