**WARNING:** This is an ever-evolving WIP research page full of information that may be out of date or entirely wrong. {{ :public:wheeloffortunetvplayalong-openedup_1_.jpg?200|}} ===== Wheel of Fortune Play Along Internals ===== Inside the [[wheel_fortune_play_along|Wheel of Fortune TV Play-Along]], there are three boards. {{ :public:lcd_controller_board.jpg?200|The Radofin XM-2296-F2 board of unknown dedication}} ==== The LCD Controller (Radofin XM-2305-A) ==== * Features two Hitachi surface mount parts: * [[https://www.sparkfun.com/datasheets/LCD/HD44780.pdf|HD44780]] Dot Matrix Liquid Crystal Display Controller/Driver * [[https://www.pacificdisplay.com/ics_app%20notes/hitachi/HD66100F.pdf|HD66100F]] LCD Segment Driver ==== The Microcontroller and Keyboard ==== * A Mattel branded [[http://pdf.datasheetcatalog.com/datasheets2/50/509136_1.pdf|COP840C]] 8-Bit CMOS ROM Based Microcontroller (the 2K ROM, 128 bytes RAM configuration) ==== Unknown Third Board (Radofin XM-2296-F2) ==== * Features 3 ICs: * [[https://www.ti.com/lit/ds/snosc16d/snosc16d.pdf|LM324]] x 2 - Quad-Operational Amplifier * [[https://www.ti.com/lit/ds/symlink/lm339.pdf|LM339]] - Quad Differential Comparator ==== Misc ==== * Piezoelectric speaker is fastened to the case, with an ID molded in plastic: 7860 BD-2093-1. ==== "The Sensor" ==== Looks like a photo-diode with a lens above it. {{:public:wofsensor_1_.jpg?200|Likely a photodode?}} ==== Misc Images ==== {{:public:xm-2296-f2_1_.jpg?200|}} {{:public:cop840c_1_.jpg?200|The COP840C Microcontroller on the MCU/Keyboard board}}