Dan's

Icon

Dan's Internet Page

A Day At The Park

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

A day at Penrose State Park. Dan Rippon

Ginger Onion Garlic Spinach Tofu Tomato Milk Nutmeg Cinnamon Salt Pepper Cumin Garam Masala Indian Dish

I decided to make a Ginger Onion Garlic Spinach Tofu Tomato Milk Nutmeg Cinnamon Salt Pepper Cumin Garam Masala Indian Dish.

I decided to make a Ginger Onion Garlic Spinach Tofu Tomato Milk Nutmeg Cinnamon Salt Pepper Cumin Garam Masala Indian Dish.

The recipe is the name of this post. Serve with rice.

Tri-Color Animated LED Cube

This is an LED cube I built capable of individually driving any of the 27 individual LEDs at a time in either green, orange, or yellow. It is built using three layers of bi-color LEDs connected with common cathodes with each layer being a 3 x 3 grid of LEDs connected common cathode. Vertically, columns of three LEDs are connected with common anodes. The result is three cathode levels and 18 anode levels which through multiplexing and persistence can drive any LED anode individually or in an animation.

Tri-color Animated LED Cube

Tri-color Animated LED Cube


It works by refreshing each cathode level at a rate faster than the eye can perceive. Because light receptors in the eye continue to ’see’ light for about 15ms after the light has gone away, this clever trick allows the use of microcontrollers to turn on power to each cathode level, one at a time, without any visible hint of the led losing power, so long as each cathode level is refreshed at approximately 60Hz.
Tri-Color animated LED cube

Tri-Color animated LED cube


Because each LED in this cube has two anodes, a green side and an orange side, if both green and orange are powered at the same time, a third color, yellow, is visible. The result is a 3×3x3 cube of LEDs capable of individually driving any LED in green, orange, or yellow. Because of multiplexing, the cube can show a smooth animation using the LEDs. The project uses an Atmel ATMega168 and is programmed in AVR Assembly, with an animation written in AVR GCC.
.

Driving

Oscar catching a frisbee

Oscar the dog jumping to catch a frisbee.

Oscar the dog jumping to catch a frisbee.

Oscar the dog jumping to catch a frisbee.

Oscar the dog

Oscar the dog.

S

Snowy still

Snowing outside.

I woke up to some more snow today!

It started hailing an thundering this morning and progressed into a pleasant snow shower. Only about two inches at most, but I wasn’t expecting any snow since the last few days have been relatively warm. Weather in Pullman isn’t exactly predictable. Last year it snowed a few inches in the middle if June!

Snow

snow

Read the rest of this entry »