This project is an RGB Electronic Die that generates the codes from 1 to 6 through 7 RGB LEDs as outputs for showing the mentioned numbers while the inputs are the codes generated by a 7490 counter fixed to count from 000-101. For carring out the RGB Electronic Die, it's necessary to design a decoder interface between counter and display by being this last one: a configuration of 7 RGB LEDs referenced previously. Also, we'll need to use a rotary switch of 4 poles y 3 positions for selecting the three possible colors: Red, Green or Blue.

Step 1: Bill of Materials

1 PCB 9cmX 15cm

7 5mm RGB LEDs

7 LED Mounting Hardware LowPro T1-3/4 Clear

1 IC7490

1 IC7408

1 IC7432

1 IC7404

1 IC555

4 Socket IC 14-Pin Dual Wipe Low Profile 0.3 Inch Wide

1 8-Pin IC Socket Dual Wipe Low Profile 0.30 Inch Wide

1 Potentiometer of 10K

1 Resistor of 470 Ohm, 1/4Watt

1 Electrolytic Capacitor of 1uF

1 Voltage Regulator 7805

1 Switch Push Button Tactile

1 Rotary Switch 4 poles y 3 positions

1 9V Battery Snap with 6 Inch 26 AWG Wires

1 9V Battery

Some connecting wires

Step 2: Schematic I: the Design

Schematic I is the design of your project.

Step 3: Schematic II: the Project

Schematic II is the whole project.

Step 4: Schematic III: Clock Circuit

Schematic III represents the clock circuit that you need in your project.

Step 5: Identifying RGB LEDs

Before installing the RGB LEDs, you need to Identify correctly the pins of all RGB LEDs that you are going to use in your project.

Step 6: Install the LEDs and IC Sockets

Once installed the LEDs and the IC sockets, you can connect the LED's cathodes each other.

Step 7: LED's Cathodes to IC Sockets

Note that you will be connecting the LED's cathodes to IC7490 in its pins 7 & 10 while IC7408 and IC7432 in theirs pins 7.

Step 8: Install the Capacitor

Install the capacitor of 1uF by connecting it to pin 1 of IC555 its negative polarity while its positive polarity to the pins 4 & 8 of that same integrated circuit. Besides that, connect from pin 1 of IC555 to pin 7 of IC7404 and to LED's cathodes.

Step 9: Installing the Pot & Resistor

Install the pot of 10K and resistor of 470 Ohm by following the instructions on your schematics.

Step 10: Install the 7805

Install the voltage regulator so that you can do all interconnections among the integrated circuits and 7805. That is, the pins that will be connected to +5V: pin 14 for IC7404,IC7408 & IC7432, pin 5 for IC7490 and pin 4 & 8 for IC555.

Step 11: Install the Switch & the Battery Snap

Install the switch and the battery snap with wires red & black so that you can do the connections at the rest of circuit.

Step 12: Make Hole of 3/8"

Need to make a hole of 3/8" so that you can install the rotary switch.

Step 13: Identifying the Rotary Switch

Identify the pins of your rotary switch by identifying each pole from 1 until 4 and begin with the first position in Red for each pole. That is, pole 1: Red, Green, Blue, pole 2: Red, Green, Blue, pole 3: Red, Green, Blue, pole 4: Red, Green, Blue. Check your schematic.

Step 14: Install the Rotary Switch

Install the rotary switch and the plastic knob and do all connections carefully. Note that you can fold each pin of the first position for establishing a color; for example, you can begin with red to connect all red colors from the pole 1 to pole 4 according to the schematic cited.

Step 15: Connect the 9V Battery

Connecting the 9V battery, you can play with your RGB Electronic Die and you also have the option of selecting from three colors: red, green or blue. Enjoy it.