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from LNS TECHNOLOGIES |
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A Van de Graaff generator is an electrostatic machine which uses a moving belt to accumulate very high voltages on a hollow metal dome. The American physicist Robert Jemison Van de Graaff invented the Van de Graaff generator in 1929. Modern day applications for these high voltage generators include accelerating electrons to sterilize food & process materials, accelerating protons for nuclear physics experiments and driving X-ray tubes.
This miniature version is designed for having fun, but can also be used to perform electrostatic experiments. Under optimal conditions, it can produce over 25,000 volts and sparks as long as ¾ of an inch. Though startling, discharges from the Van de Graaff generator do not represent a serious shock hazard since the currents attainable are so small.
What can you do with this amazing device? You can make paper streamers float up and stand on end as the like charges repel each other. Or you can watch a spinner whirl around in circles from just the force of an "ion wind". You can impress both family & friends by making a fluorescent lamp glow by simply holding it your hand! It makes a great science project and will provide hours of fascinating demonstrations that teach electrostatic concepts.
SPECIFICATIONS:
Are you tired of digital clocks with tiny four-digit displays? Our Jumbo 6-Digit
Clock gives you the full SIX digits and each digit is a whopping 2.2 inches tall!
The result is an eye-catching timepiece that is visible from anywhere! The seconds
display gives precise timing accuracy.
Place it on a desk, shelf or hang it on a wall and you can stop squinting to see the time. Other jumbo clocks form the digits with a bunch of LED "dots", but these are SOLID 7-segment displays with super brightness! The electronic kit is fun & easy to build and ALL parts are included. Perfect for home, work, classrooms, stores & HAM shacks.
DETAILS:
Low cost digital clocks have been available for many years, but most show the time in a static four-digit display. The LNS Scrolling Clock creates an interesting timepiece by presenting the digits in a dot-matrix format and scrolling the time in a ticker-tape fashion. The result is an eye-catching timepiece that is truly unique. Place it on your desk, mantle or table and watch the attention it gets!
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Download the Atmel AT89C2051 microcontroller source code by clicking on the IC:
Ion propulsion is a reality!
Now you can build your own ion propulsion motor that works on the same basic
principles as NASA's Deep Space-1 craft. This project uses a high-voltage
potential that generates four streams of "ion wind". The ion streams exert
enough force to spin a rotor at a remarkable speed. This high-tech device
makes a great science project or an interesting desktop toy. The ion motor
also generates negative ions which can reduce pollen and pollution in the
air to produce a healthier environment.
Do you need to accurately check temperatures without squinting your eyes? Our Jumbo LED Thermometer diplays temperature in 3 digits and each digit is a whopping 2.2 inches tall! The results are accurate temperature readings that are visible from anywhere! The sensor can be remotely mounted for indoor or outdoor use. The temperature display is jumper selectable between Fahrenheit or Centigrade.
The design is very attractive with an included red acrylic front panel. This electronic kit
is fun & easy to build and ALL parts are included. You will have a working thermometer within a few hours!
This easy-to-build kit includes a DS1822 direct-to-digital temperature sensor that measures temperatures from -55°C to +125°C (-67°F to +257°F).
The DS1822 sensor is easy to encapsulate in silicon or epoxy for a
robust and waterproof sensor that makes it perfect for outdoor use or for aquariums or hot tubs.
The temperature sensor uses the Dallas/Maxim 1-Wire serial bus, so it can be remotely located from the display.
This kit is perfect for tropical fish tanks, home beer brewing, hydroponic gardeners or weather watchers!
Several customers are using this high-tech kit to remotely monitor temperatures on their solar panels.
The kit is featured as a constuction article in the May 2010 issue of Nuts & Volts Magazine.
Build a Jumbo LED Digital Thermometer, by David Williams
GREAT FEATURES:
Stepper motors can be used in a wide variety of hobby applications:
Robotics, Motorized Telescopes, Engraving Machines, Plotters, CNC Machines, etc.
This bipolar chopper drive can control a variety of stepper motors for any of those applications. It has been designed for easy set-up and use. This drive works with BIPOLAR (4-wire or 8-wire) motors. It is ideal for development projects because it already includes a single power supply and a motor for evaluation. Or you can just connect your own power supply and motor and the drive is ready to run. Motor current is set using an on-board potentiometer. No external current setting resistors are required. This feature-packed drive provides all basic motor controls, including full or half stepping of bipolar steppers and direction control. An oscillator circuit is standard on the drive with an on-board speed control potentiometer. In addition, external input/output signals allow complete remote control of all drive functions. It even includes detailed instructions on interfacing to the printer port of any PC computer! This driver has appeared as an entry in a FIRST Robotics Competition.
Includes integral aluminum heatsink. See a photo of a homebuilt CNC machine that was built using this driver:
View stepper driver CNC machine
FEATURES:
Input Voltage: +10 to +24 VDC
Motor Enable: Enabled/disabled by on-board switch or external I/O connection.
Input Direction: Selected by on-board switch or external I/O connection.
Modes: Full step & Half step.
Single Step Operation: Via on-board pushbutton switch.
Motor Current: Variable from 250mA to 2 Amp continuous duty rating.
Continuous Opeation: Either with on-board oscillator controller with potentiometer or external I/O connector.
Small volume: 3 x 4 x 2 inches
The kit includes a double sided PC board, all parts, a transformer and a bipolar stepper
motor; everything you need to get running immediately. A detailed illustrated assembly
manual helps you learn while you're having fun! This kit also makes a great educational
project for demonstrating stepper motor control principles.
This amazing kit contains resistors, capacitors, transistors, integrated circuits, coils and all other necessary components. You simply assemble the parts on two state-of-the-art printed circuit boards. You will be both amazed and proud of the results. A 20-page detailed illustrated assembly manual helps you learn while you're having fun!
The original version of this kit appeared in the the February 1996 issue of "Electronics Now" magazine.
Here is a great website where you can read the entire article:
Levitator Article
Our original levitator sold for $75 and was fairly complicated to construct.
This NEW levitator has been re-designed for easy construction and lower cost!
SPECIFICATIONS:
Perfect For:
Nixie tubes were originally developed in 1952 by the Burroughs Corp. as a numberic readout device.
In recent years they have become popular again, perhaps because of their unique "glow" or maybe just
out of nostalgia. They are being used in a variety of applications, but the most popular use today of
Nixie tubes is for building ultra-cool clocks. One of the challenges in using Nixie tubes is the fact that they need 180VDC potential on the anode to get the gas to produce that nice warm glow. That's exactly what this encapsulated DC/DC converter was designed to do! It converts +12VDC input (actually any input voltage between +11VDC to +26VDC) into +180VDC output.
NOW YOU CAN AVOID UNSAFE AC STEP-UP TRANSFORMERS!
This easy to use converter has only 4 pins: 2 for your DC input voltage and 2 for the 180 volt output to your Nixies. It couldn't be simpler! The output voltage is fully regulated and can supply up to 12 mA. - plenty of current for up to SIX Nixie tubes. The converter has standard 0.1 inch pin spacing, so it can be soldered directly on a PC board or can be plugged directly into a perf-board or proto-board.
Here is a photo of a Nixie Clock built by one of our customers, using the NIX180 power supply. Note: this clock is NOT FOR SALE.
Click below for data sheet & application example:
PDF Datasheet
PDF Application Example
FEATURES:
Input Voltage: +11 to +26 VDC @330mA max
Output Voltage: +180 VDC @ 12mA (fully regulated)
Small volume: 1.5 x 2.0 x 1.0 inch
This is not a kit. It is fully assembled and tested under full load. It comes with a data sheet and a sample application schematic.
If you are interested in Nixies and are looking for a great supplier of tubes & accessories, here is a recommended website:
Nixie Tube Supplier
Then you need this powerful stepper motor driver! This driver uses the SLA7062M IC which combines low-power CMOS logic with high-current, high voltage power FET outputs to deliver a whopping 3 Amps of motor current. The SLA7062M is part of the SLA706xM series from Allegro/Sanken.
This drive will deliver the power you need, but how about precision? Well, this happens to be a Microstepping Drive! You can select from half-step, quarter-step, eighth-step and even sixteenth-step modes. Combine a 200-step-per-revolution motor with the sixteenth-step mode and you'll get an amazing 3200 steps per revolution. That's 0.1125 angular degrees per step!
There's more: This drive works with UNIPOLAR (6-wire) motors. Unipolar motors typically are more plentiful and lower cost than bipolar motors, so you can save money on your project. In the past, unipolar drives required large dropping resistors that ran really HOT. Not any more! This drive uses PWM (pulse-width modulation) to deliver maximum power to your stepper motor with NO DROPPING RESISTORS.
Here's another feature of this wonderful drive that you shouldn't do without (especially for CNC machine builders): Idle Power Reduction. This means that as long as the motor is in motion, the drive delivers the full power that you have set. But if the motor is stopped for more than 2-seconds it automatically switches to half power. Or you can disable the Idle Power Reduction and run constantly at full power.
The drive accepts simple STEP & DIRECTION signals. The input signals are fully opto-isolated and the drive can be easily connected to the parallel printer port of your computer. The drive will work with any DC voltage from 10V to 40V DC.
In addition to offering the unipolar microstepping driver kit, we are ALSO selling the SLA7062 IC and the bare PC board separately for those who want to experiment with it on their own.
IMPORTANT NOTE: This kit does NOT include a stepper motor or power supply. You will need to provide a unipolar motor, a DC power supply and the STEP/DIRECTION signals.
You can also purchase this driver fully assembled and tested:
Fully assembled CNC drivers
Click below for the SLA7062M data sheet:
PDF Datasheet
Setting the time involves the simple operation of two buttons at the rear of the clock.
The clock is encased in a sturdy, crystal clear plexi-glass cabinet, which displays the inner
circuitry for all to see. The power is drawn from an ordinary 12V AC wall adapter.
This Nixie clock combines nostalgic Nixie tubes with state of the art digital circuitry in a classy acrylic case. Timekeeping is precisely derived from the AC line frequency. The tubes are directly driven using high voltage driver ICs to give solid, flicker-free operation. The colon is make with matching Neon bulbs and blinks each second. This unique clock also features battery backup so you will never lose the current time - even when the AC power goes out!
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The Binary Clock tells accurate time in high-tech style. It combines precision and fun in an easy-to-build kit.
Six rows of brilliant BLUE LEDs are used to display hours, minutes and seconds in binary code - the language of computers.
Once you understand the basics and after only a few moments of practice, you will have no trouble at all "reading"
the time by adding the values of LEDs in each column.
Or you can just watch the constantly changing light display that creates thousands of unique patterns.
Measures 4-1/2" x 5-1/2" x 2"
This unique clock features battery backup so you will never lose the current time - even when the AC power goes out! The kit includes an attractive plastic enclosure that looks great in any setting.
Everyone will be amazed and delighted by your binary clock.
White LEDs are very different from standard incandescent light bulbs. They produce a light which is very close to sunlight. The light is directional from 15° to 60°, unlike standard light sources. In some installations this can be a plus, while in others it can be considered an opportunity. This module was designed for people who want to retrofit existing light fixtures or build something new. With our new White LED module, you can design a light that has a long life, is not bothered by heat or cold, and can survive bumps and constant vibration. Truly, this is a light for the Twenty-First Century.
Let your imagination go wild with this 18-LED honeycomb shaped module. The honeycomb shape allows combining multiple modules into larger lighting systems. This is NOT a kit. It is fully assembled, tested and ready for you to put to unlimited use!
Use it for a flashlight, a bicycle headlight, a lamp for exploring caves, patio or sidewalk lighting, a bedroom nightlight, camera & security lighting, camping, boating or solar lighting. The applications are only limited by your own ideas.
Power usage: 11-14VDC, 160 milliamps @12VDC; Measures 1-1/2" across the flats, 1-3/4" maximum diameter.
Click below for data sheet:
PDF Datasheet
Build this scrolling LED message kit and make a statement with bold scrolling text.
Display messages on your own digital billboard. It is completely programmable to say
what you want! The message can be changed at any time using the 3 onboard control buttons.
It is a definite eye-catching device in many occasions. There are literally hundreds of uses for the sign. It is a perfect promotion tool for retailers, restaurants, trade shows, network marketing, sales people, political statements, new product introductions and many others. Use your imagination: you can use the sign in many other fun ways. What a surprise to have the Scrolling Message Sign wish someone a "Happy Birthday" or "Happy Anniversary" with exciting scrolling text. Leave messages for family members and guests. This amazing sign gives you the ability to say whatever you want, whenever you want and wherever you want!
Your message is stored in EEPROM, which means it is saved indefinitly, even when the power is off!
Create a personalized message, then send the scrolling sign to a friend or love one. As soon as they open the box
and plug it in, this clever device will automatically deliver your special greeting. Everyone will be delighted!
Incredibly simple to program – just press the up/down buttons to scroll through the menu of letters and special characters.
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An on-board step pulse generator is adjustable with a potentiometer from approximately 2 to 500 pulses per
second. Jumper switches allow you to control the full/half step functions, direction and
enable modes. In addition, all signals can be interfaced to external logic, a PC parallel port or a
microcontroller. This controller is a robot builder's dream come true!
The kit includes a PC board, all parts, a transformer and a stepper motor; everything you
need to get running immediately. A 20-page detailed illustrated assembly manual helps you
learn while you're having fun! There are 4 LEDs that indicate the windings that are energized.
Ideal kit for those learning about step motors. This kit also makes a great educational project for
demonstrating basic stepper motor control principles.
This stepper driver also includes a special operating mode that allows the use of travel limit switches (limit switches not included).
The circuit has two active-low limit switch inputs. When the limit switch mode is enabled with JP3,
the direction of the motor automatically reverses when the limits are triggered. This allows you to create applications like oscillating
store advertisments or animated Halloween displays.
Input Voltage: +12 to +30 VDC
Modes: Full step & Half step.
Limits Inputs: Automatic direction reversal when limit switches (optional) are triggered.
Continuous Operation: Either on-board oscillator or external I/O.
Dimensions: 3 x 4-3/4 x 7/8 inches
Ready To Go: UNISTM-MPS-KIT Includes demonstration motor and power supply!
The sun is the ultimate renewable energy source that pours out unimaginable amounts of energy. Most of the sun’s energy is emitted as visible light. To harness the sun as a source of energy, it must be converted from visible light into either heat or electricity. Visible light can be converted directly to electricity by utilizing a technology referred to as the photovoltaic effect. Photovoltaic devices are constructed by layering special materials called semiconductors into thin, flat sandwiches called solar cells. When sunlight strikes a solar cell, electrons naturally travel from one layer to the other through connecting wires because of the different properties of the two silicon wafers.
This project is a wonderful demonstration of clean, green solar power and is based on BEAM technology.
It uses no batteries or AC power! It operates completely from renewable light energy.
When the solar cell is exposed to sun or any bright light source, the pendulum will start to swing, almost magically. Each time the pendulum passes the bottom of its swing, a hidden coil will give the pendulum a little nudge using stored electricity generated by the solar cell. This secret nudge keeps the pendulum in perpetual motion as long as there is enough light! This cool kit was inspired by the Magbot Pendulum project in Dave Hrynkiw's book titled: Junkbots, Bugbots & Bots on Wheels.
The Solar Pendulum makes a great science project or an interesting desktop accessory.
This high-tech device is a unique toy and a learning tool all in one. It is fascinating to watch and highly educational.
This kit is an audio lover's delight; a TDA7256 Integrated Circuit (included in the kit) is used to produce
an amplifier that can output up to 30 watts into a 2 Ohm load. {Note: additional heatsinking required for high power output.}
Sound quality is very, very high. Originally intended for use in an automobile, the kit could just as well be built for home use. The small board and heatsink make installation and connection a breeze. Just connect your inputs, your speakers and power. Don't worry about overloads, or shorts on your outputs because it has automatic protection. In addition, there are 2 slide switches on the board to select muting and stand-by modes as desired. If you're looking for a sweet little inexpensive audio amplifier, this is for you!
The TDA7256 is a class AB fully protected bridge power amplifier with high current capability, allowing it to drive low impedance loads. It has differential inputs, making it particularly suitable for applications in boosters and active loudspeakers.
A bridge amplifier combines the power output of two channels into one channel. Bridging allows the amplifier to drive one speaker with more power than the amp could produce for two speakers. Because of this high power output, a bridge amplifier is the best way to drive a single subwoofer.
Since this powerful audio amplifier is designed to work on battery power, it can easily be incorporated into a great portable guitar practice amplifier. Other uses include MP3 output amplifiers, simple phonograph amplifiers, intercoms, line drivers, alarms, ultrasonic drivers, TV sound systems, AM-FM radio, small servo drivers, power converters, etc.
Input Voltage: 8.0 - 18.0VDC
Output Power:
RL: 4 ohm = 22W
RL: 3.2 ohm = 26W
RL: 2 ohm = 30W
No Audible Pop During Mute and Standby Modes
Very Low Standby Power Consumption
Output Short Circuit Protected
Dimensions: 2.5 x 3.0 x 1.5 Inches Tall
TERMS:
RETURNS:
REPAIRS:
LEGAL:
SHIPPING:
CALIFORNIA PROP 65 WARNING:
Payments accepted from PayPal only. No COD orders. Payments by Credit Cards are processed through PayPal.
LNS Technologies reserves the right to limit quantities on all items.
In the event that an item is listed at an incorrect price due to an error in pricing,
LNS Technologies shall have the right, at LNS Technologies' sole discretion,
to refuse or cancel any orders placed for that item.
Only un-assembled kits can be returned postpaid and we will refund the original purchase price of the kit once the kit has been inspected.
We do not refund the original shipping charge. Refunds will be made in the same method that the original payment was made.
Kits returned must have all the original parts present and in unused condition. Once the kit assembly has begun, we cannot
accept returns.
Once assembled, any kit can be returned for repair by including $10 payment for shipping & handling. Kits with missing parts
do not qualify for the repair service. Repairs should be sent insured to: LNS Technologies, PO Box 501, Vacaville, CA 95696
LNS Technologies reserves the right, without further notice, to make changes to and of its products described or referred to herein
to improve reliability, function or design. LNS Technologies does not assume any liability arising out of the application or use
of any product or circuit described herein. The products described herein are not designed, intended or authorized for use as
components in systems intended to support or sustain life, nor for any application where the use or failure of the product could
create a situation where personal injury or death may occur. Neither liability nor responsibility is assumed with respect to the
use of the information contained herein, nor for any infringements of patents or other rights of third parties which may result
from its use. It is the sole responsibility of the customer to acquire any necessary licenses, permits, or permissions
applicable to the use or possession of the product.
Our shipping fees may include handling charges. On all shipments, we reserve the right to choose the carrier and most
appropriate method of shipping.
These products contain chemicals, including lead, known to the State of California to cause cancer, birth defects, and other reproductive harm.
Wash hands after handling.
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| Alltronics |
| www.alltronics.com |
| 2761 Scott Blvd |
| Santa Clara, CA 95050 |
| 1-408-778-3868 |
