In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Electronegativity wrote:

Hi Beau,

I am thinking of building a "Micro Simon Sez".

It would be an SX20 mounted on one of those Sparkfun boards with blue, red, green, and yellow LEDs around it.

The processor will generate a table of random numbers from 1 to 4 and flash the digits in proressively longer sequences.

The user will press colored tactile switches according to their memory of the pattern.

I want to make it as small and light as possible, which makes a 3V coin battery ideal.

The blue and green LEDs can run off 3V, and I am going to take advantage of the voltage drop across diodes to step the voltage down for the red and yellow.

The SX will trigger transistors to light the diodes so as to aviod sourcing too much current since each diode can draw 20 to 30 mA and I want to put 2 of each color per side.

William: Thanks for the advice, but since it is only a toy, the user (me) will shut it off when not in use so the processor will never actually be in sleep mode.

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