Here are step by step instructions on how to make a toy robo snake. It is having two 3V DC motors, one 3.7V li-Po battery and one simple transistor base astable multivibrator circuit board. The frequency of the circuit is less than 1Hz. The timing can be changed by changing the value of C1 and C2.
The head part of snakes gets an oscillation motion because of this circuit and the motors. This oscillation is then moved down along the body towards the tail, giving a snake like body movement to the toy.
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