Produces realistic sight and sound effects you'd expect in a space weapon. The 'gun' can be set for stun (single-shot) or rapid-firing modes. While firing, two LEDs visually indicate impulse frequency while an 8-ohm speaker transmits the audio tone. In both modes, a potentiometer easily adjusts output pitch or firing rate. What you will learn: * Clock circuitry * 555 and 556 Timer circuits * R/C Timing circuits * VCOs (voltage controlled oscillators

$9.95

One of the most useful, inexpensive transistor regulated power supplies you can build, this 300ma Power Supply can supply voltages with the necessary current to run transistor radios, portable tape recorders, electronic games, and a host of educational kits. This is a very usable device that will serve you well for many years. What you will learn: * Rectification * Transformer action * Filtering * Voltage regulation

$15.95

At last! Here is an automatic siren that definitely sounds like the real thing. When switch S1 is closed, the siren continuously cycles through the complete high-low oscillation pattern. There is no need to open a switch at the 'critical' moment to cause the sound to decay. In addition, there are no components to adjust or alter. Put the circuit together, connect a 9V battery, turn it on, and you're in business. The output is suprisingly loud and piercing. Use it with the Burglar Alarm Kit as an attention getter, or for just plain fun. This kit can also be used as a code practice oscillator by removing one jumper wire. In either case, the Automatic Siren will give you hours of excitement and satisfaction.

$15.95

This unique kit is a great holiday project and provides an attractive decoration as well. Flashing eight bright LEDs at random, the project produces a "dialing effect" with a novel approach in a traditional package. Can be hung as an ornament, displayed in window, or set on end for table or mantle. An attention-getter enjoyed the entire year! What you will learn: * Clock circuits * R/C timing circuits * LEDs * Duty cycles

$13.95

Hidden Tormentor is a fun game you can play on friends. It emits a sudden burst of high pitch oscillation (five sec every two minutes) that when hidden, is very difficult to find. Your friends will go crazy tring to find it! Works by using a low frequency oscillator in conjunction with a high frequency oscillator. Lots of fun! What you will learn: * Oscillators * Positive feedback * Charging paths * Changing resistor values

$9.95

Flashing a pair of LEDs at a rate of about two "blinks" per second, this project is a neat toy that teaches a great deal about electronics. The circuit is basically an astable multivibrator or free-running oscillator, and as such it is one of the more popular types in use today. Educational and entertaining too! What you will learn: * Free-running oscillators * R/C timing circuits * Switching transistors * LEDs

$9.95

There are all kinds of birds in this world, but no bird sounds quite like this one! The Digital Bird can do imitations - everything from a 'tweeting' canary to a silly chicken - all with the turn of a few pots. A great introduction to sound synthesis, you will learn quite a bit and have lots of laughs too. What you will learn: * Oscillators * Logic circuits * Transistor amplifiers * Voltage dividers

$9.95

This is an easy-to-build dual alarm control for your car, house, room, or even closet. After the alarm is on, the only way to turn it off is to open S1. It could a key switch if you prefer. Many connection types could be used for N/O and N/C switches. Complete with a large 9V buzzer. Many different uses are possible with this Burglar Alarm Kit. What you will learn * SCR (silicon controlled rectifier) * Diode operation * Alarm devices * N/O, N/C switches

$9.95

Find new money and old treasure by getting started in metal detecting. Simply place the circuit near an AM radio antenna, tune the radio between stations without static, and adjust R1 until radio static occurs. Next, turn R1 slightly further until static just stops. When L1 comes near a metal object, the radio prompts with static! What you will learn: * Oscillator circuits * Radio transmitters * R/C timing circuits * Voltage Dividers

$8.65

Pocket Dice is a handy little project to be used with any game of chance. Since it uses CMOS circuitry, it has the advantage of operating off a 9V battery, thus is quite portable. LEDs "blink" rapidly when switch S1 is pressed. When released, each LED set "freezes" in one of six common die patterns. Startle your friends! What you will learn: * Clock circuitry * Presettable counters * R/C timing circuits * Logic NAND and OR gates

$15.95

This TV/FM Oscillator is great to experiment with! It will make channels 2 through 13 go 'bananas' when adjusted right on the channel. People will wonder what's wrong with the set if you do it secretly.! With this TV/FM Oscillator, you will learn many electronics principles. What you will learn: * RC tuning circuits * Switching transistors * Voltage dividers * Radio frequency transmission

$9.95

Transmit your voice on any FM radio with this FM Mic with a range up to 1,000 feet. Operating between the frequency of 90MHz to 110MHz, the frequency is tunable by varying the inductance of the tune circuit. A small mic picks up the voice and converts it to electrical current, which frequency modulates (FM) the transmitter. Learn: * Basic FM theory * Oscillator circuits * Radio transmitters * Audio amplifiers

$15.95

$ 34.95 each

Assembling your own Transistor/Diode Tester would prove to be an exciting project and give you much satisfaction and a sense of personal achievement. This dynamic tester allows checking of transistors and diodes in circuit. Identifies NPN or PNP transistors. Checks all types, small or large power. Identifies anode or cathode of diodes. With complete instructions, this is a great project and useful tool for electronics hobbyists and students.

$24.95

 Build yourself a fantastic multimeter! Features include: * 20000 ohm/Volts * 19 Ranges * 3 1/2" Meter * Mirrored scale for accurate readings * 3% Accuracy * Checks transistors * 10A DC current. This is another excellent undertaking as a class project. Students will learn important electronics principles and have a useful meter too! Specifications: * DC Volts: .1, .5, 2.5, 10, 50, 250, 1000, 3% FSR * AC Volts: 10, 50, 250, 1KV--4% FSR * Sensitivity: DC 20K ohms/V, AC 8K ohms/V * Resistance: X1, X10, X1K, X10K.

$27.95

Model
MM-8000

$133.25

W/590 Pin Breadboard. Ideal for school projects. Features: * 3 regulated power supplies (5V at 1A; +12V at .15A; -12V at .15A) * Short protection * 3 clock frequencies (1Hz, 1KHz, 100KHz) * Eight LED readouts * 2 no bounce logic switches * 590 pin breadboard * 100 power pins. This kit is a terrific learning experience! Specifications: * Load regulation: 1% 0 to .15A * Line regulation: 1% 110V to 130VAC * Clock amplitude: 5V PP square wave * Logic indicators: 8 LED 100K input.

$159.95

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