Arduino Workshop - Project 02: RGB LED

Hardware Required: Arduino Uno board RGB LED 330 ohm resistors (x3) jumper wires

Schematic:

Arduino Workshop - Project 01: Blinking LED

Hardware Required: Arduino Uno board LED (any color) 330 ohm resistor jumper wires

Schematic: Note: most Arduino modules have an LED connected to D13 already. Your LED should blink at the same time it does.

Project Steps: Insert the LED into the breadboard Connect a wire between the ground and the short pin of the LED Connect a 330 ohm resistor between the Digital pin 13 (D13) on the Arduino and the long-leg of the LED Connect the Arduino unit to your computer with the USB cable Open the Project1 sketch into the Arduino software and upload it to your module Things to try: Code: Change the blink rate from 1 second to 3 seconds Code: Change the blink rate to "strobe" at 50 times per second. Can you change it to blink at 60 times per second? LED: What happens if you reverse the LED (resistor & short-leg to D13, long-leg to GND)? LED: What happens if you reverse the LED but connect the long-leg to +5V? Code & LED - Change the sketch to use an LED connected to D7 instead of D13

Common Electronic Components used with Arduino

Component:	Schematic:	Image:
Resistor, units = Ohms Ω K = 1000, M = 1000000 Resistor values can be determined by "decoding" the color stripes on the device. The first two colors are the value, the third stripe is a multiplier (number of zeros to add). The fourth stripe is usually metallic and indicates the tolerance.
Potentiometer (adjustable / variable resistor) Units = Ohms Ω K = 1000, M = 1000000 Potentiometers may have a numerical value printed on the side or bottom. Read this similar to the color stripes. In the image, you can see a value of 103; In a color code, this would be Brown-Black-Orange = 10000 ohms or 10K ohms.
Photo Resistor, units = Ohms Ω K = 1000, M = 1000000
LED (Light Emitting Diode) The short leg connects to the ground or negative, and long leg to a positive voltage source in your circuit.
Diode The stripe on the barrel indicates the cathode and corresponds to the "T" side of the schematic.
Switch (pushbutton, toggle, momentary contact) Other switch configurations include: DPST - Double pole, single throw SPDT - Single pole, double throw DPDT - Double pole, double throw	SPST - Single pole, single throw:
Relay The 5-pin configuration pictured corresponds closely to the schematic, with the 2-pin end for the (electromagnet) coil, and the 3-pin connection for the switch.
Transistor - NPN
Ground The Arduino UNO modules have three pins identified as a ground connection. This is usually connected to the negative connection of your power source as well.
Battery a 9v battery clip (red=positive, black=negative):

Check out Arduino Workshop - Project 01: Blinking LED from one of our In-Store Clinics.

Stayed tuned for more Arduino workshops posted here!

For more assistance contact Technical Support here.

Tech Tip: How to open the lock screen on the Nexus 7 by blinking your eyes

Description: How to set up your Nexus 7 so you can open the lock screen by blinking your eyes. This uses a feature called Face Lock.

1. Open Settings.
   
   
   
   
2. Open Security.
   
   
   
   
3. Open Screen Lock.
   
   
   
   
4. Select Face Unlock.
   
   
   
   
5. Select Set it up.
   
   
   
   
6. Select Continue.
   
   
   
   
7. Make sure you look at the Nexus 7 straight on, so the camera can pick up your face.
   
   
   
   
8. When it captures your face you will see this screen.
   
   
   
   
9. Check "Liveness Check" so it requires you to blink to unlock the screen.
   
   

For more assistance contact Technical Support here.