-Sprint Layout 6.0 (circuit designer)
-Copper clad circuit board
-Thermal heat transfer paper
-2 status leds
-Max232, rs-232 chip
-16× resistor 200 Ohm
-2× resistor 470 Ohm
-1× resistor 10k
-4× resistor 2,2k
-4x NPN transistor BC338
-1x 10uF capacitor
-1x 1000uF capacitor
-6x 0.1uF ceramic capacitor
-2x 22pF ceramic capacitor
-1x crystal 14.7456 MHz
-2x tactile button
-optional pwr switch
-connector for 12v power
-optional connector for 5v power
Step 1: Designing
First of all let's design the circle in Sprint Layout 6.0.
I have uploaded my finished circuit for you to use if you don't want to spend time with constructing the circuit.
Step 2: Printing, Ironing, Etching
If there are mistakes with the printing, use alcoholic marker pens to repair.
Now you can etch down the unnecessary copper. WARNING: Use plastic gloves & mask!! Pour 30% concentrated hydrochloric acid into a plastic bowl. Put your board into the hydrochloric acid and leave it there for a few seconds. Now let's add the hydrogen peroxide to the hydrochloric acid. You can see that the substances react with each other. About after 30-50 seconds you can remove the board and rinse it with water and soap.
Step 3: Drilling, Soldering, Led Cube
Step 4: Program the Controller
Connect the programmer to your cube and your computer.The command is "avrdude -c usbtiny -p m16", wherer -c specifies the programmer, and -p the AVR model. You can see the output in the images below.Now, upload the firmware: "avrdude -c usbtiny -p m16 -U flash:w:main.hex".
To enable the external oscillator and disable JTAG, we need to program the fuse bytes:run "avrdude -c usbtiny -p m16 -U lfuse:w:0xef:m"and "avrdude -c usbtiny -p m16 -U hfuse:w:0xc9:m".
Be carefull when doing this step! If you get it wrong, you can permanently destroy your microcontroller!
After writing the correct fuse bytes, the cube should reboot and start operating at regular speed with all leds operational.