Pemrograman ic max7219 dengan bascom avr

Make dents in all the intersects with a center punch.

Find a piece of wood large enough to make a 4x4 grid of 2,5cm on.

I found that 25mm (about an inch) was the optimal distance between each led (between the center of each led that is!) to enable soldering without adding or cutting wire. The distance between the lines in the grid was decided by the length of the LED legs. I wanted to make the cube as easy as possible to make, so I chose to use the LEDs own legs as much as possible. Cara paling mudah memprogram display 7 segment adalah dgn bantuan IC MAX7221 atau MAX7219. Pemrograman Display 7 Segmen dengan MAX7221 /MAX7219 via komunikasi SPI. If we flash 4 16 led images one at a time, really fast, we get a 4x4x4 3d image! Soldering grids of 4x4 LEDs freehand would look terrible! To get 4 perfect 4x4 grids of LEDs, we use a template to hold the them in place. This relies on a phenomenon called.Įach layer is a 4x4 (16) image. The way to work around it is to only light up one layer at a time, but do it so fast that the eye doesn't recognize that only one layer is lit at any time. This ghosting effect is impossible to workaround without adding 64 individual wires. When I supply GND to the lower layer and VCC to the front left column, I also light up the upper right led in the front (3,3,3), and the lower left LED in the back (0,0,0). However, if I also want to light up the bottom right corner in the front (3,3,0), I run into problems.

If i only want to light up one led at a time, or only light up more than one layer at the same time.

Now if i want to light up the LED in the upper left corner in the back (0,0,3), I just supply GND (-) to the upper layer, and VCC (+) to the column in the left corner. All the LEDs on a horizontal layer share a common cathode (-). All the LEDs aligned in a vertical column share a common anode (+). One way to get around this, is to split the cube into 4 layers of 16x16 LEDs.

How to control 64 LEDs without using 64 individual wires? Running a wire to the anode of each led would obviously be impractical, and would look really bad.

4x NPN transistor BC338 (or other transistor capable of switching 250-ish mA).

Know how to program an AVR microcontroller - I will not cover that in this instructable.

Basic electronics and soldering skills.

First of all, you need quite a bit of time to solder together 64 leds ) Knowledge list:

Pemrograman ic max7219 dengan bascom avr