1. Bdps 2 Lecture 2

2. Circuits and Ohm's Law For resistive circuits

3. Series and Parallel Circuits Series circuit Same current, voltage divides Parallel circuit Same voltage, current divides

4. Illustration on Board

5. Series Example

6. Parallel Example

7. Our First Circuit Blink an LED Determine the resistor value Use a switch to activate the circuit

8. Components Battery(power supply) Resistor LED Switch

9. Functions Battery to power circuit LED to produce the light Resistor to control circuit current suitable for the LED Switch to turn the circuit 'on'

10. Draw Schematic

11. Determine Values LED rated for 11mA(milliampere) forward current at 2V (volts) For a 5V battery power and 2V across the LED the remaining 3V need to appear across the resistor Since LED is rated at 11mA(0.011A) and is in series with resistor, same current flows through resistor. So resistor value should be 3/0.011 = 272.7ohm. We will use 270 ohm.

12. Calculation on Board

13. Physical Setup and Demo

14. Using Arduino Control LED Use a digital output line Control timing

15. Arduino IDE

16. Free Download http://arduino.cc/ http://arduino.cc/en/Main/Software

17. Software Introduction File input/output System setup Serial communication Program upload Help and reference

18. Software Introduction Comments Setup section Subroutine section Main program

19. Blink LED Programming Select output pin System setup DigitalWrite function Delay() function

20. Demo Physical setup Write program for arduino Upload program Run system