This circuit use four oscillators. Three first of them attack three ADC. Fourth is CLK to latch the data. CLK has been getting from a 555 in the "Voltage Controlled oscillator" mode (FM). This CLK change time between pulses and ensure differents times to latch the data. More impredecible RANDOM data.
All frequencies are different to ensure minimum time before they coincide again with not integer number.
Orange wave is used to controlling the 555.
Green wave is CLK to fetch data.
I think this is the best "aleatory number generator" I have made.
It can be modified to show 1 to 49 (lottery)...
I hope you like it.