Propellerclock.doc

Propeller Analog/Digital Clock History I got this idea by browsing the web. I found by hazard? Mr. Bob Blicks page who make the first propeller clock.? I began to check how can I build one myself.? Base on AVR AT90S2313 I saw rapidly that my MCU must be clocked very fast to make all the calculations needed to light the leds at the right place.? The speed is at 16Mhz,? 4 times faster than Atmels specifications. Its working without any problems. Each time the PCB passed at 12h00 an hall effect sensor sensed the magnet and generated an interruption. At this time, we have to check the counter to se how many ticks had been passed from this rotation since? the last rotation tooks this value and divide it by 360. This calculation will gives you the time between each degree.? Now, you have to set an interruption to occur at each degree and after you will be able to light leds whenever you want at any of 360 degrees.? At this MCU speed, there is no jitter everything is just FIXED!!! A simple IR sensor is used to take the signal from the remote control (set to a Sony protocol). Dont forget to use HIGH BRIGHTNESS LEDS 1600mcd.? Leds are not lighted very long so the mcds power must be high. ? Features Analog clock mode Digital clock mode Infrared clock setting with a standard universal remote control ? Pictures Click to enlarge Anoalog mode Digital mode Stopped with flash at 1/60 sec ? Sources codes Shematics -Shematic in PDF format ? //************************************** // Clock 16Mhz // Version 1.0 Janvier 2002 // Sylvain Bissonnette //************************************** //************************************** // I N C L U D E //************************************** #include io2313v.h #include macros.h //************************************** // D E F I N E //************************************** #define TRUE 0x01 #define FALSE 0x00 #define ANALOG 0x01 #define DIGITAL 0x02 //**************************