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Embed code for: Light Following Breadboard Robot
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Light Following Breadboard Robot
The Light Following Breadboard Robot, is a simple robot whose body is build around a full size breadboard. The Robot Brain is an Arduino Nano that it is placed at the back of the robot.
It has two light dependant resistors (LDR's) at the front of the robot hooked up as part of a voltage divider (more on this later) so that it can detect ambient light. The drivetrain of Robot consists of two continuous rotation servos and a small castor wheel at the back to provide stability. Ben is a great robot to build with kids as it teaches them the basics of breadboarding, but also because it is a fun and easy robot to control.
To make ben you will need the following components: · A small sheet of acrylic ·
https://core-electronics.com.au/store/index.php/solderless-breadboard-840-tie-point-zy-w102.html/?acc=eccbc87e4b5ce2fe28308fd9f2a7baf3A Breadboard ·
https://core-electronics.com.au/store/index.php/arduino-nano.html/?acc=eccbc87e4b5ce2fe28308fd9f2a7baf3An Arduino Nano · Two Continuous Rotation Servos · Two hobby wheels (I used model aeroplane wheels) · A castor wheel · 9V battery · 4.8V rechargeable battery pack (or just 4 AA’s in a battery case) · Two Light Dependant Resistors ·
https://core-electronics.com.au/store/index.php/600-pack-of-1-4-watt-1-resistors-30-values-20-of-each.html/?acc=eccbc87e4b5ce2fe28308fd9f2a7baf3Two 10,000 ohm Resistors ·
https://core-electronics.com.au/store/index.php/breadboard-jumper-cable-wires-65-pack.html/?acc=eccbc87e4b5ce2fe28308fd9f2a7baf3Some breadboard jumper cables · Double Sided Foam Tape · Adhesive Velcro dots ·
https://core-electronics.com.au/store/index.php/vertical-vertical-slide-switch-dpdt.html/?acc=eccbc87e4b5ce2fe28308fd9f2a7baf3 A Power Switch (not necessary but would be handy) You won’t need any tools for the construction however you could replace the Double Sided Foam Tape with Hot Glue in which case you would need a Hot Glue Gun. Now the first thing that may need further explanation is the use of the Light Dependant Resistors. Light Dependant Resistors (or LDR’s) are resistors whose value changes depending on the amount of ambient light, but how can we detect resistance with Arduino? Well you can’t really, however you can detect voltage levels using the analog pins, which can measure (in basic use) between 0-5V. Now you may be asking “Well how do we convert resistance values into voltage changes?”, it’s simple, we make a voltage divider. A voltage divider takes in a voltage and then outputs a fraction of that voltage proportional to the input voltage and the ratio of the two values of resistors used. The equation for which is: Output Voltage = Input Voltage * ( R2 / (R1 + R2) ) Where R1 is the value of the first resistor and R2 is the value of the second.
Light Defendant Resistor Wiring:
Voltage Divider with LDR's