CMOS FISH CALLER
#1

PRESENTED BY:
Shashank Mehta
Sandeep Kumar
Sachin Agrawal
Rahul Sadasivan

[attachment=11906]
CMOS FISH CALLER
Our idea
• Our idea behind this project is to help those who earn their livelihood b catching fish day and day out in the scorching heat.
• With this it is going to be very easy for those fisherman to catch the fish without any difficulty.
Circuit diagram
working

• The circuit is basically a low frequency oscillator. It built around a gate of IC. The much common CMOS CD4093m Schmitt 2-input NAND GATE.
• The circuit can be operated off supplies between 3 to 12 Volts, the higher the better. However for compatibility a 9 Volt type flat battery such as PP3 or Eveready 216 is preferred.
• Variable Resistance(VR) is used to vary the frequency over a wide range.
• Variable Resistance(VR) should be so adjusted that by trial and error, we hit upon the sound that "attracts the big ones".
• Any speaker may be used with a water proof cover, having an impedance of 180 ohms or more.
• The circuit, battery and controls can be fitted near to the rod and the speaker on the fishing line.
Appilcation
• It can be used to detect big fishes in under water.
• It produces a sound that attract fishes towards it.
• It helps the fishermen to catch fishes with ease as the fishes converge towards this hence making the fishermen’s job easy.
• It can be used for both small scale and as well as large scale purposes.
benefits
• The circuit is very cheap.
• No Complexity in the circuit.
• This device is easily applicable.
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