Hi
I am Ritesh Mahto
this is my first robotics project - " THE LINE TRACER ROBOT WITHOUT MICROCONTROLLER "
These robot contains no any kind of microcontrollers , instead it uses only integrated circuit (IC) and some other electronics parts.
I had no any knowledge about microcontroller's . So to making these line follower robot i have worked from last two months. Finally it's made!!!! . I have made these robot without anyones help and lessons about electronics and robotics..
This Line Follower Robot basically use a Cadmium Sulphide (CdS) photocell sensor or known as Light Dependent Resistor (LDR) and the high intensity blue Light Emitting Diode (5mm LED) to illuminate the area under the LDR sensor to sense the black track line. The LDR will decreases its resistance in the presence of light and increase its resistance in the dark. The region under the LDR is illuminate with a high intensity blue LED, the white surface will reflect most of the light to the LDR surface while the black track line will absorb most of the light, therefore less light will reflect to the LDR surface. The 20K trimpot and LDR basically is the voltage divider circuit when the LDR detect the black track line it will receive less light intensity (LDR resistance increase). Result, the geared DC motor will turn slowly or stop. When the LDR on the white surface it will receive maximum light intensity (LDR resistance decrease) . Result, the geared DC motor will turn fast.
components
High power LED(5mm) - 4
LDRs - 4
preset - 20k - 4
220 Ohm Resistors - 4
L293d (motor driver IC)
Geared motors 200 rpm - 2
chassis - ready made or hand made anything will do
Li-ion rechargeable battery
Burg strip, 2 pin relimat & other secondary stuff.
Motor Driver IC L293D
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* i m not having usb cable of my mobile thats why videos were not uploaded.
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