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NeoPixelPiClock

The NeoPixelPiClock is one of my machines that uses Arduino. It is a clock that displays the time in binary (using NeoPixels) and beeps at pi o'clock PM.

NeoPixelPiClock

Thanks to James Rosindell for the picture.

Movie of the PiClock ticking (.mpg)

Pi Clock 1 Pi Clock 2 Pi Clock 3 Pi Clock 4

Backside

Pi Clock 5 Pi Clock 6 Pi Clock 7

How to read the time

Determine which LED goes on an off every second. This is LED with index 0. Then the LEDs are ordered clockwise. LEDs 4 and 8 change state every 1 in 5 seconds, to indicate their position.

LED index	0	1	2	3	4	5	6	7	8	9	A	B	Color
seconds	1	2	4	8	16	32							Red
minutes					1	2	4	8	16	32			Green
hours	16								1	2	4	8	Blue

Example 1

Image the LEDs having the following colors (R: Red, G: Green, B: blue, blank: no color):

LED index	0	1	2	3	4	5	6	7	8	9	A	B
LED	R	R				G			B

This equals: 1:02:03 (hh:mm:ss)

LED index	0	1	2	3	4	5	6	7	8	9	A	B	Color
LED	R	R				G			B
seconds	1	2	4	8	16	32							Red
minutes					1	2	4	8	16	32			Green
hours	16								1	2	4	8	Blue

Example 2

Image the LEDs having the following colors (R: Red, G: Green, B: blue, blank: no color):

LED index	0	1	2	3	4	5	6	7	8	9	A	B
LED	R	R	R	R		G	G	G	B	B	B	B

This equals: 3:14:15 (hh:mm:ss)

LED index	0	1	2	3	4	5	6	7	8	9	A	B	Color
LED	R	R	R	R		G	G	G	B	B	B	B
seconds	1	2	4	8	16	32							Red
minutes					1	2	4	8	16	32			Green
hours	16								1	2	4	8	Blue

Example 3

Image the LEDs having the following colors (R: Red, G: Green, B: blue, blank: no color, M: magenta (R + B), Y: yellow (R + G), C: cyan (G + B)):

LED index	0	1	2	3	4	5	6	7	8	9	A	B
LED	M	R		R	Y	Y		G	C	C	B

This equals: 23:59:59 (hh:mm:ss)

LED index	0	1	3	4	5	7	8	9	A	B	Color
LED	M	R	R	Y	Y	G	C	C	B
seconds	1	2	8	16	32						Red
minutes				1	2	8	16	32			Green
hours	16						1	2	4	8	Blue

Prototype

Pi Clock Prototype 1 Pi Clock Prototype 2