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Mechanical Calculator (Addition & Multiplication!)

šŸ§® I designed a 3D-printableĀ mechanical calculatorĀ that can perform āž•Ā additionĀ and āœ–Ā multiplication!

Available in 2 Styles:

šŸ”¢ Basic Version

  • Doesn't need an MMU or Prusa XL.

šŸø Froggy Version

  • Print with multiple colours using the Prusa XL or MMU (or colour it in yourself!)

How to Use It

Move the feet to the numbers you want to add/multiply and the hands will point to the answer!
There are 2 bases available to print:Ā āœ– MultiplicationĀ andĀ āž• Addition.

How it works

šŸ“ This mechanical calculator operates using aĀ planar hinge mechanismĀ involvingĀ symmetrical isosceles right-angled triangles. TheĀ hypotenuses of these triangles slide along number lines, while their vertices are connected, forming aĀ hinged rhombus. By placing the sliding points on different integers, theĀ calculator determines the midpoint of these integers to display the results. This model is based onĀ the expired ā€œeducated monkeyā€ patent from 1915.

Assembly Guide

Froggy Version:

Step 1: Place the Screws, Feet, and Vertical Bar onto the Base.

Step 2: Add the Legs. The Left Leg must go on top of the Right Leg as pictured.

Step 3: Add the Right Hand. (Note: The Right Hand is thicker than the Left Hand)

Step 4: Add the Left Hand.

Step 5: Add the Face.

Step 6: Add the Nuts. You may need to tighten/loosen them for smooth operation.

Step 7: You're done!

Basic Version:

Step 1: Place the Screws, Feet, and Vertical Bar onto the Base.

Step 2: Add the Legs. The Left Leg must go on top of the Right Leg as pictured.

Step 3: Add the Right Hand. (Note: The Right Hand is thicker than the Left Hand)

Step 4: Add the Left Hand then add the Nuts. You may need to tighten/loosen them for smooth operation.

Mechanical Calculator (Addition & Multiplication!)

by Bryce Ā· original on Printables ā†—

Learning / Math

ā™„ 258ā¬‡ 535šŸ–Ø 2 prints

License: Standard Digital File Licensemonkeymechanicalmathcalculatordivisionmultiplicationdividetablestimesmultiplycalcfroggy

Print profiles

  • Froggy Version.3mfDEFAULT

    ā± time and weight estimated after preparation Ā· 1 material(s)

    Made to order: we prepare this file when you order, which adds a few minutes before printing starts.

    Prints on: A1 mini 0.4PLA

    Order this print

  • Basic Version.3mf

    ā± time and weight estimated after preparation Ā· 1 material(s)

    Made to order: we prepare this file when you order, which adds a few minutes before printing starts.

    Prints on: A1 mini 0.4PLA

    Order this print

  • Base - Addition.3mf

    ā± time and weight estimated after preparation Ā· 1 material(s)

    Made to order: we prepare this file when you order, which adds a few minutes before printing starts.

    Prints on: A1 mini 0.4PLA

    Order this print

  • Base - Multiplication.3mf

    ā± time and weight estimated after preparation Ā· 1 material(s)

    Made to order: we prepare this file when you order, which adds a few minutes before printing starts.

    Prints on: A1 mini 0.4PLA

    Order this print

  • Base - Addition (Multi-colour for MMU or XL).3mf

    ā± time and weight estimated after preparation Ā· 1 material(s)

    Made to order: we prepare this file when you order, which adds a few minutes before printing starts.

    Prints on: A1 mini 0.4PLA

    Order this print

  • Base - Multiplication (Multi-colour for MMU or XL).3mf

    ā± time and weight estimated after preparation Ā· 1 material(s)

    Made to order: we prepare this file when you order, which adds a few minutes before printing starts.

    Prints on: A1 mini 0.4PLA

    Order this print