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Building Control Circuits
for Use with the Calculators and Computers

WARNING: These circuits should only be used to control low-voltage, battery-powered devices. NEVER CONNECT THE CIRCUITS TO WALL OUTLETS OR OTHER AC SOURCES!

Building Instructions for the LACI Smart Cart
Build LACI, the Linear Algebraically Controlled Innovator, using readily available components. With free Math Machines software, LACI responds to simple, Excel-like function to move with any velocity (up to about 125 mm/s) you specify. Great for exploring uniformly accelerated motion, simple harmonic motion, exponential functions and much more.

If you have a SersorDAQ interface from Vernier Software and Technology, you can use it to control an inexpensive hobby servo motor using free-form mathematical equations. The servo motor can be used to move a laser pointer, mirrors, probes and much more

 

Our most versatile robot controller, this board has its own PIC chips to keep the stepper motors running at pre-selected speeds while the calculator and interface work at collecting data or other tasks. The board also provides 4 servo ports and 2 programmable 12-volt outputs. Works with either the CBL2, LabPro or the original CBL. (Adapter required for the original CBL)

With the LabPro, the board can also be operated from a computer using LabVIEW.

Click here for a spreadsheet with details on the speed control (Excel)

Technical Information about Board-Level Programming (pdf)

SAM Programs (pdf)

SAM Setup Program (pdf)

This circuit allows a TI graphing calculator to control the digital output lines of the CBL, CBL2 or LabPro, operating toy cars, lights, buzzers, motors and more. Construction of this controller does not involve soldering.
A low-cost pointer that lets the calculator control the direction of a flashlight or other object .Construction of this controller does not involve soldering.
An easy-to-solder circuit that lets you control a car, light, fan or other on-off device. It works especially well with PASCO's motorized cart. The circuit is also useful for learning the basics of digital communication.

A calculator-controlled "Pointer" that can turn through a precise angle at a precisely controlled speed.

It has enough power to function as well as a "Power Pulley," turning gears or other mechanical systems.

Pointer User's Guide (pdf)

Allows the calculator to control either 1 high-precision stepper motor or up to 4 servo motors. Great for experimenting with robot arms and lots of other projects.

Using the Motor Controller (pdf)

Each board allows one of the LabPro's Digital ports to control both a stepper motor and either a servo motor or a voltage-activated device such as a light or buzzer. With two boards, the LabPro can run a SAM robot.

A single board can also be used with the CBL2 to run a 1-dimensional cart or a pointer.

Home
About Us
FAQs
Site Map
Contact Us
Educational Theory
Classroom Activities
Workshops
Calculators and Programs
Machine Construction