Weasel is a tenacious little robot warrior that embodies two sensors that allow it to “see” a line or “feel” its way along walls and around corners. The two motors and contact sensor activate the wall sensing micro switch to control the motors’ on/off operation that determines the path of a wall. It is the classic robot design using the “Left Hand Rule” to escape mazes. With OWI’s continued pursuit in making robots “smart”, they have added an additional feature to this little bundle of energy… a sonic tracking system. Underneath Weasel’s sturdy plastic base, you will discover photo- transistors that enable it to detect and follow a black line. Wow! Weasel still has more features! Want… speed? Well, its three-speed gearbox will help navigate at the velocity you determine.

Quick and easy to assemble, this is a beginner robot that make great entrants for robotic competitions, robotic workshops, after-school programs, special events, gifts, science enrichment camps, and classroom activities.

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This is very similar to the first TV video game on the market. A lot of fun for someone who remembers these games, as well as a great kit to learn about video interfacing to the TV. Definitely the most fun we have had in a while. It has Single and Double player modes.

Features

* video and audio output
* adjustable brightness
* auto power off

Specifications

* Power supply: 3 - 1.5V AA batteries (not incl.)
* Dimensions: 2.9″ x 5.5″
* NTSC Video Output

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Every wonder how they figure out who pushed the answer button first? This circuit will allow up to four players to compete, or you can daisy chain them together for up to 8 players. Led lights for whoever pushed the button first. Easily extend the push buttons from the circuit board with wires and your own momentary switches. This is a great educational tool, or base circuit to build your own game show booth. Circuit must be reset via the quiz master push button to start over again.

Specifications

* Power supply: 9 Volt Battery (not incl.)
(or Use this Power Supply instead of a Battery)
* Dimensions: 4.3″ x 3.1″ x 1.1″

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Be “On Air” with your own radio station! This transmitter is an exciting product that will broadcast a high quality stereo signal in the 88 – 100MHz FM band. It can be connected to any type of stereo audio source such as personal computer, CD player, Walkman, television, tape deck or stereo system to transmit stereo sound with excellent clarity throughout your home, office, yard or camp ground.

It can also be used in a car to play CDs through your car radio when attached to a personal CD player. Other applications could be listening to a satellite radio station through any FM radio. In addition, it can be connected to your personal computer or laptop to enable listening to Internet radio stations or pre-recorded digital music (such as MP3 files).

The circuit includes a 9V battery snap and a 3.5mm stereo jack mounted right on the board for easy connection to any audio source. An ON/OFF switch as well as an “On-Air” LED indicator are also incorporated on the board.

The circuit is based on the popular BA1404 stereo broadcaster IC which contains all the complex circuitry for generating the stereo FM signal. A 38 KHz crystal provides a stable sub-carrier for the stereo signal. The oscillator circuit is stable enough for reliable reception even on digitally tuned FM radios. Separate right and left input level adjustments are also included.

Specifications:

* Supply voltage: 6 - 9V DC (Includes snap for 9 volt battery, 12V DC with minor modification) (Need a Power Supply?)
* Frequency adjustable: 88 to 100MHz
* Power consumption: < 20mA
* Power Output ~ 1mW
* Transmission range: approx. 400 feet (unobstructed)
* Input sensitivity: adjustable from 50mV
* Channel separation: > 30dB
* Includes 3.5mm stereo jack
* L: 3″ W: 2-1/8″ H: 1″.
* Any FM receiver can be used to listen to broadcast.

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The Velleman Personal Scope is not a graphical multimeter but a complete portable oscilloscope at the size and the cost of a good multimeter. Its high sensitivity - down to 0.1mV/div - and extended scope functions make this unit ideal for hobby, service, automotive and development purposes. Because of its extreme value for money, the PersonalScope is well suited for educational use in schools and colleges. Suitable for measurements on audio equipment, mains voltage applications, digital signals, all kind of sensors, signal analysis in automotive applications, car stereo, etc… Its full auto setup function, makes measuring waveforms very easy.

Specifications:

* 10MHz sampling rate
* 0.1mV sensitivity
* up to 2MHz analogue bandwidth
* 5mV to 20V/div in 12 steps
* 200ns to 1hour/div time base in 32 steps
* full auto set up
* trigger mode: run, normal, once, roll, slope +/-
* X and Y position signal shift
* DVM readout with x10 option
* audio power calculation (rms and peak)
* dBm, dBV, DC, rms … measurements
* signal markers for Volt and Time
* frequency readout (through markers)
* recorder function (roll mode)
* signal storage (2 memories)
* LCD: 128×64 pixels / high-contrast
* up to 20h on alkaline batteries
* power supply: 5 x 1.5V AA battery or Nicd / NiMH (not incl.)
* includes battery charging circuit

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The ever-popular Boe-Bot(R) Full Kit is now available with a USB-compatible Board of Education (BOE) - at no additional cost to the consumer! Programming the BASIC Stamp via USB is an elegant solution for laptops and newer PCs which have no serial ports (no more adapters required!). USB driver installation instructions are available for download on the USB Board of Education page.

We’re particularly proud of Andy Lindsay’s new Robotics with the Boe-Bot text. The Robotics text includes 41 new activities for the Boe-Bot robot with structured PBASIC 2.5 source code support and bonus challenges with solutions in each chapter. Starting with basic movement and proceeding to sensor-based projects, customers quickly learn how the Boe-Bot is expandable for many different robotic projects. No previous robotics, electronics or programming experience is necessary. View the improvements for an overview of what’s new, or download the Robotics text below to review our documentation. Parallax offers the most complete, clear and interesting support for this kit. Over 90,000 Boe-Bot robots are in use by hobbyists, educators and students around the world, which provided lots of feedback for improvements to this popular kit along the way.

The Boe-Bot robot is built on a high-quality brushed aluminum chassis that provides a sturdy platform for the continuous rotation servo motors and BASIC Stamp’s USB Board of Education. Many mounting holes and slots may be used to add custom robotic equipment or off-the-shelf Parallax add-ons. The rear wheel is a slider ball held in place with a cotter pin. Drive wheels are molded to fit precisely on the servo spline and held in place with a small screw.

What really makes the Boe-Bot unique is the BASIC Stamp micro controller’s flexibility of programming when coupled with breadboard circuit construction. Following along in Robotics with the Boe-Bot, users quickly learn about embedded projects, from wiring and components to programming and mechanical dependencies. The kit includes a set of passive components (wires, resistors, capacitors), sensors (photo resistors, bumpers, infrared sensors) and hardware (whisker touch-sensor kit) to complete the different projects.

The Boe-Bot robot takes about 1-2 hours to put together, though each project in the Robotics text provides a unique new experience of wiring and source code tuning. Completing the entire set of projects takes 50 hours and is suitable for anybody over 12 years of age. The USB Board of Education (and BS2-IC) may also be removed to be used as your platform for the other kits in the Stamps in Class series.

After mastering the basics, Boe-Bot add-ons let you branch out into new activities, such as making your Boe-Bot talk with a speech board, adding infrared remote control, maze contests, line following, interfacing direction sensors, and using RF modules and video/camera equipment to build a Video-Bot. Boe-Bot accessories are all sold separately, and are available through the Robot Accessories page below.

To get a visual of the Boe-Bot robot in action, check out our Boe-Bot Video Gallery. (Requires 4AA batteries-not included). Educators may obtain the Teacher’s Guides by sending an e-mail to stampsinclass@parallax.com.

Specifications:

* Power: 4 AA batteries (not included).
* Requires PC Running Windows 98/2000/XP
* Requires USB or Serial Port
* Assembly of Robot aprox 2 hours
* Requires basic hand tools and soldering equipment. (Need tools?)

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A Science Kit for the 21st Century!

Assemble and Experiment with a Unique Reversible Fuel Cell

This new Thames & Kosmos Fuel Cell Kit provides a playful introduction to one of the most significant technologies of the 21st Century. With this kit you can build a model car that actually runs on water!

Pour in the water and watch it separate into hydrogen and oxygen, forming a gas to power your vehicle across the floor. Now that we have your attention, roll up your sleeves and find out more through experiments and demonstrations you can do on your own, in a classroom or with friends.

Fuel cells are one of the most promising means of producing energy in the future. Because they do not consume fossil fuels they are considered environmentally friendly. Automobile manufacturers are already experimenting successfully with this technology and it is widely believed that fuel cells will become the energy source for automobiles in the near future.

With this unique kit, you can build your own experimental reversible fuel cell car to learn more about this energy source. With more than 30 experiments and demonstrations, provided either in the kit or on our web site, users will learn how a reversible fuel cell works to perform electrolysis as well as to create energy. The electricity required to activate electrolysis is created with a large solar cell included with the kit. During electrolysis, water is separated into hydrogen and oxygen and the resulting energy is stored as a gas. When needed, the gas is fed into the fuel cell, which then serves as the power source.

The Fuel Cell kit also includes a digital MultiMate which measures currents and voltage, allowing you to learn exactly what a fuel cell is and how it functions. The experiments and demonstrations explain the physics upon which this future technology is based.

Experiments
30 Experiments include: How to build a solar-powered car; Effects of direct and indirect radiation; Characteristics of a solar module; Electrolysis and its effect on water; Oxy-hydrogen test; How to construct and load a reversible fuel cell; Decomposition of water in the fuel cell; Qualitative and quantitative analysis of gas in a fuel cell; How efficient is electrolysis?; How light influences electrolysis; Solar electrolysis; Fuel cell-powered car. Add your own experiments!

Kit contains: Complete reversible fuel cell (hydrocycle system) • Wire • Motor • Chassis • Axle • Gas collector • 4 Wheels • Solar panel with support • Syringe • Tube • Digital multimeter • Test tube • Protective goggles • Labels • Bag of small parts for fuel cell • Bag of small electronic parts • Comprehensive lab manual with 30 experiments and demonstrations • (Additionally required: 1 quart of distilled water)

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This Electronic Science Lab will teach you about electronics from A to Z. You will learn about electronic parts, how to read schematics, and wiring diagrams. All this, while building up to 500 different projects. This kit uses two quick and easy hook-up methods:

Spring Method: Simply slip pre-cut wires and components into special springs for a safe, secure connection.

Breadboard Method: Featured in this advanced kit, this system is used by professionals and engineers. Just plug the components and wires into the special breadboard socket holes.

No soldering is required. Everything uses battery power - no dangerous AC is required, so it’s safe for all ages. Labs come with all components and wires needed to build each project. NO TOOLS ARE REQUIRED. No prior knowledge is needed to assemble and build these exciting projects. Easy-to-read, illustrated, lab-style manuals take you through each electronic experiment step-by-step. All are designed for ages 10 & up, so these are ideal for MIDDLE SCHOOLS and HIGH SCHOOLS.

Features:

* Everything you need to build 500 Exciting Electronic Projects.
* Learn the basics of electronics and put your knowledge to work creating 500 different electronic experiments, special lighting effects, radio transmitter and receivers, amazing electronic sound effects, cool games and MORE!
* Includes built-in breadboard for easy wiring and connection of components, and an LCD (Liquid Crystal Display) indicates the information during the experiments in process!
* Build your knowledge by exploring amplifiers, analog and digital circuits plus how to read schematic diagrams.
* Includes transistors, transformers, diodes, resistors, capacitors, phototransistors, CDs, integrated circuits, speaker, earphone, LEDS, LED digit display!
* Fact-filled, illustrated, lab-style manual included.

Requires 6 “AA” batteries (not included)

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This timer is a cyclic timer with a fixed total ON / OFF period of 1 minute, 30 minutes or 1 hour. Three on-board jumpers can be used to limit the total ON / OFF period to 1 minute, 30 minutes or 1 hour. You can then set the ON period of the cycle using the variable resistor. For example, if you set the variable resistor to 1/3 of its range, the ON period will be about 20 minutes and the OFF period will be about 40 minutes (assuming the jumper is set to the 1-hour mode).

Specifications:

* Supply voltage: 9 to 12V DC or 18V AC C.T. (2 x 9V AC) Transformer / 100mA
* Time adjustable from 15 seconds to 60 minutes
* Output Relay:
Maximum 3A at 110V AC or 24V DC
Maximum 1.5A at 220V AC
* PC board dimensions: 3.05″ x 1.80″

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This complete high quality, low noise stereo audio power amplifier is based around the Hybrid Integrated Circuit STK4432 manufactured by Sanyo. The circuit incorporates volume and balance controls and has a maximum music output power of 55W per channel (35W per channel RMS). The circuit incorporates an on board power supply; therefore, only an appropriate transformer is required to power the circuit.

Specifications:

* Supply voltage: 30 to 36V AC transformer / 2 to 3A
or 30 to 36 VDC at 3 Amps
* Input sensitivity: 300mV
* Output power using 36V AC:
* Music power – 2 x 55W / 4 Ohm
* RMS power – 2 x 35W / 4 Ohm
* Includes volume and balance controls
* Maximum distortion: < 0.2%
* Frequency response: 30Hz to 30KHz
* PC board dimensions: 4-3/4"L x 2-1/8"W x 2-3/4"H

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