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First Fish

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Notes

Photo license information located in repository.

Original Big Mouth Billy Bass version was modified as follows:

• Skeleton extracted
• Two 555-based square-wave generators were used to control mouth and body/tail motions
• Circuits modified by using 104 trim pot (10k ohm) to increase period
• Body and tail motions were connected, simplifying motions
• N-channel MOSFETS used to interface square-wave signal with motors
• Custom enclosure fabricated to minimize footprint
• Slide switch to control power

Newer Big Mouth Billy Bass version modified as follows:

• Skeleton extracted
• Two 555-based square-wave generators were used to control mouth and body/tail motions
• Circuits modified by using 104 trim pot (10k ohm) to increase period
• 555-timer circuit used for body/tail motion control had output and its inverse sent to motor driver board
• Slide switch to control power