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Easy to build, only 2 wires to connect (connect after ignition). Uses multi colour 3mm LED... green: battery OK, Slow pulsing (green): battery OK or charging, red: battery voltage is low, red blink... CAT# MK-189
$9.95 each
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The Basics Lite: 14 Exciting Labs --- eTron Circuit Labs. 28 page booklet. Includes a solderless breadboard and parts to complete 14 educational electronics labs. CAT# KT-95
$17.95 each
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Power up to four 1W or two 3W high-power LEDs (not included). Delivers accurate constant current required by most high-power LEDs. High efficiency due to switch mode principle. Built-in rectifier f... CAT# MK-8071
$16.95 each
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Features big sound from a small unit. Low distortion. Stereo 3.5mm jack input. Volume adjust complete with attractive knob. Slide on/off switch. Blue indicator led. 2 x 5Wrms (10% THD @ 4ohm / supp... CAT# MK-190
$19.95 each
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Small but powerful amplifier suits a wide range of applications such as: microphone amp, for doorbells, melody generators, intercom, sound effects, earphones, radio receivers, PC sound card and mus... CAT# MK-8066
$14.95 each
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The Basics: 40 Exciting Lab --- eTron Circuit Labs. An immersive, hands-on curriculum of fun and illustrative electronics projects that teaches the fundamentals of electronics. Designed to be S... CAT# KT-40
$24.95 each
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Velleman # K4001. Small amplifier constructed around a TDA2003 IC, capable of delivering 4 Watts RMS at 4 Ohms. Music power: 7 W @ 4 ohms. RMS output: 3.5 Watts @ 4 Ohms / 2 Watts @ 8 Ohms. Frequen... CAT# MK-4001
$19.95 each
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Velleman # MK111. For intermittent operation of circuits and equipment. Use for blinking light control, slide projector control etc. Pulse time adjustable between 0.5 and 5 seconds. Pause time adju... CAT# MK-111
$9.95 each
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Two potentiometers adjust the flash rate of two LEDs. 9V operation. Battery not included. Note: Kits cannot be returned or exchanged once assembly has begun. CAT# MK-1021
$4.95 each
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Velleman # K7300.Versatile kit allows charging of NiCd and NiMH batteries of different voltages and capacities. Settings for rapid and normal charge rates. Also has a feature that discharges the ba... CAT# MK-173
2 Available
$29.80 each
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Simple do-it-yourself kit provides hours of fun. The aim of the game is to use the 4 pushbuttons to repeat a randomly generated pattern shown on the 4 LEDs. The pattern is played both visually and ... CAT# MK-112
$9.95 each
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Velleman # K8004. Ideal for the accurate control of DC motors, lighting levels and small heaters as well as other applications. The circuit converts DC voltage into a series of pulses, the duration... CAT# MK-804
$28.95 each
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Drive your friends (or enemies) crazy. Automatically comes on when it gets dark. Adjustable chirp rate, light sensitivity and tone. 9V operation. Battery not included. Note: Kits cannot be retur... CAT# MK-104
$8.95 each
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Velleman Kits # KNS7. Fun with gears and motors. Small 3 Vdc motor, metal bracket and axles, and an assortment of small plastic gears and collars to produce a gear train of various ratios. Note: ... CAT# GR-84
$11.95 each
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This halloween pumpkin kit features 25-LEDs that flash randomly to simulate the effect of a flickering candle. One extra high-intensity yellow LED illuminates the pumpkin. On/off switch. This is a ... CAT# MK-145
$8.95 each
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The SparkFun Inventor's Kit is a great way to get started with programming and hardware interaction with the Arduino programming language. Includes everything you need to complete 15 circuits that ... CAT# SFA-22
$99.95 each
10 or more    $89.96 each
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Announce visitors, warn against burglars, set boundaries, for science projects, with audible (85dB) and visible (LED) alert. Range: 3.3ft to 13ft. Power supply: transmitter: 9V DC / 50mA max. Recei... CAT# MK-120
$10.75 each
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The easy way to check your IR remote for proper operation. Simple operation : point the remote at the sensor and push any button. 4 flashing LEDs indicate remote operation. Power supply: 9V battery... CAT# MK-137
11 Available
$7.50 each
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Build electronic circuits to learn how LEDs and transistors work. This is a great kit for beginners to learn electronics. The Blinky Lights Kit leads you through 10 core activities, from a simple L... CAT# JRG-01
$24.90 each
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Build this variable speed led chaser. 10 leds flash sequentially at whatever speed you set them for. Easy to build kit includes pc board, parts and instructions. Ideal for special lighting effects,... CAT# AEC
$6.95 each
10 or more    $6.50 each
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Two L.E.D.'s flash in unison when a 9 volt battery is attached. This kit includes a p.c. board, all the parts and instructions to make a simple flasher circuit. A quick and easy project for anyone ... CAT# LEDKIT
$2.50 each
100 or more    $2.25 each
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Operates at safe voltage level. Makes lamps flash to the rhythm of the music. Usable for halogen bulbs. Optically isolated speaker input. Adjustable sensitivity. Can be used in the car, if the lamp... CAT# MK-114
$13.95 each
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Velleman# K7102. Ideal for locating metal pipes and objects in walls or ceilings. An LED indicates if a metal object is in the vicinity. If an audible signal is desired, space is provided for a buz... CAT# MK-7102
$18.00 each
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5 red LEDs. Incorporated microphone. Adjustable sensitivity. Power supply: 3V type CR2032 battery (not included). Note: Kits cannot be returned or exchanged once assembly has begun. CAT# MK-115
$8.95 each
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Velleman # K2633. Control up to four high-power circuits from a low power drive circuit. Four 3 Amp / 240 Vac, S.P.D.T. relays. Quick and easy to build. LED status indicators. 3" x 1.7." Power supp... CAT# MK-2633
$21.95 each
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Velleman# MK-127. Bug-shaped miniature robot. Driven by two miniature motors, its photocell sensors seek light. Stops in total darkness. LED eyes indicate driving direction. 3.93" x 2.36." Operates... CAT# MK-127
$14.95 each
This product is currently on Back Order and should be available after 12/09/16
 
126 LED multicolor animated Xmas gadget. No need to remove battery when using external supply. 12V operation possible for use in cars, trucks. On/off switch included. Power supply: 9 to 12V DC or 9... CAT# MK-116
1 Available
$30.00 each
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Signal output: sine wave, triangle, square wave and integrator (selectable through jumper). Signal frequency: about 1 KHz (fixed). Output level: adjustable from 0 to 100mVrms (LEVEL potentiometer).... CAT# MK-105
$10.95 each
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Push the button to start spinning action. Spinning speed gradually decreases, finally it stops and one LED remains lit. Auto power-off. Low power consumption. Power supply: 9V battery (not included... CAT# MK-152
$7.95 each
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Generates sound of a vintage steam engine. Adjustable 'speed' and volume. Great for model railroads, radio plays, stage, as gadget. With 'steam whistle'-push button. Specifications: · pow... CAT# MK-134
$15.95 each
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Stereo audio amplifier boosts sound 50 times. Great for the-hearing impaired (e.g. when watching TV), as a gadget, science project, with volume control and on/off switch. Power supply: 3 1.5V AA ba... CAT# MK-136
11 Available
$12.00 each
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Miniature traffic light as used on four-way junctions. Realistic operation with adjustable delay. 12 LEDs. Great for model railroads, exhibitions, and toys. Low power consumption: 15mA. Power suppl... CAT# MK-131
$10.95 each
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This kit was developed as a pre-module for a number of audio applications where the input signal is too weak. Applications as a microphone pre-amplifier or for level correction. Compact design. Low... CAT# MK-1803
$12.85 each
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Ages 14 and up. HEXBUG VEX Robotics Catapult has a ratcheting winch that can control the distance projectiles are thrown. Crank the winch to its maximum tension, and you can hurl balls over 10 feet... CAT# RK-1
$19.95 each
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Ages 14 and up. Build a fully functional VEX Robotic Crossbow. The Crossbow has a firing lever that releases the lock and fires a dart when pressed! Adjust the distance knob to control how far back... CAT# RK-3
$19.95 each
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Ages 14 and up. Open construction with snap-together pieces allows for a glimpse at the planetary gears and real working shock absorber style springs. Learn how simple gear ratios and spring energy... CAT# RK-2
$19.95 each
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Velleman # MK-171. Make your voice sound like a robot. Add vibrato effect. Use pitch buttons to make your voice higher or lower. Built-in microphone and power amplifier with volume control - just a... CAT# MK-171
$16.80 each
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Buzzer sounds when water is detected. Water sensor can be placed at a distance by cutting the board and using wires to connect the sensor. 9V operation. Battery not included. Note: Kits cannot b... CAT# MK-108
23 Available
$7.95 each
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