Electronic Instrumentation Project 204 Project Name: Light Level Monitor Student #1: Name ID Student #2: Name ID Student #3: Name ID

Components (to be) used KY-018 Photo Resistor module KY-004 Key switch (Button) KY-019 5V Relay KY-016 RGB LED KY-012 Active Buzzer OA LM324 Resistors: Values to be calculated by students before being requested from a lecturer Arduino UNO R3 Board Breadboard Shield Wires TO DO: Components marked by RED will be provide by the lecturer after student will execute some preliminary work (see later) For every component used slide must be created: Photo (not from Internet) of the component Short decription of the component Pins allocation

Short Description of the System: Light Level Monitor Light Level is measured by KY-018 Photo Resistor module Analog signal from the sensor is amplified (and shifted) by OA Light level monitor must be designed in such a way that when photo resistor is illuminated by some stable light source (for example a lamp from fixed distance and orientation) signal on the output of the OA must be close to 5V Arduino digitizes amplified analog signals from the sensor and presents light level in the relative units (5V is 100%) as some functions of time by using Serial Plotter. * Google: “Arduino Serial Plotter Multiple Graphs”. System operation will be checked by waving objects near the photo resistor.  Think how to position sensor to ensure simple testing

Modes of Operation System can operate on the following modes: M0, M1, M2 Mode change: Every time when button (KY-004) is pressed, MODE is immediately changed: M0  M1  M2  M0  M1 ….. On start system operates in M0 M0 When in M0: RGB Led is GREEN Light Level Plot presents light level in range 0 – 100% 10 measurements per second M1 When in M1: RGB Led is BLUE Light Level Plot presents light level in range 0 – 25% 10 measurements per second M2 When in M2: RGB Led is RED Light Level Plot presents light level in range 0 – 25% and mean light level (25 last counts) 25 measurements per second If during 1 sec light intensity is changed more than 10% C, buzzer alarm is heard during 0.5 sec

Detailed system Description OA, resistors and Relay are used to set system’ parameters in accordance with M0, M1, M2 TO DO Draw system by using FRITZING: Schematic {slide} Breadboard Layout {slide} PCB {slide, Do not order !!!} TO DO Invent and Draw YOUR circuit (analog part to be connected to Arduino) {slide with drawing} Calculate required resistors values {slide with calculations} Provide SIMULATION results (of the analog part+relay) {slide with screenshots} Request missing components including relevant resistors from the lecturer by Components will be provided on the NEXT lecture (simulation of post operation) Assembly analog part + relay on the shield and check its operation with scope. {slide with photos} TO DO Assembly system on the shield {slide, photo} Prepare Block-chart of the “software” {slide} Write sketch {slides with full code written by students} Test the system {slide, photos, screenshots, protocol, etc …}