What's
New
3-AMP
Microstepping Driver Kit
Are you thinking of a cool project that uses
stepper motors? A Robot? A CNC Router? A computer controlled Plasma Cutter? An
Engraving Machine? A Motorized Telescope? A Desktop CNC Milling Machine?
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.
SLA7062M DATA SHEET
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 & 8-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 44V DC.
In addition to offering the complete unipolar microstepping driver kit (ALL
parts are included in the kit - there is nothing more to buy).
24K001 $69.00
LCD
MINI MESSAGE BOARD
Miniature message board with 16 character 1 line LCD
display message scrolls from right to left with adjustable speed
applications: at exhibitions, for advertising, to greet visitors at the
front door, as name tag, ...46 character message memory possibility to
add pauses during scrolling . Specifications: Power supply: 2 AAA
battery (not incl.)
Dimensions: 3.9" x 1.5" x 1.3" DATA
SHEET
MK157 $24.95
LCD
MINI MESSAGE BOARD WITH BACKLIGHT AND ENCLOSURE
Miniature message board with 16 character 1
line backlit LCD display 124-character EPROM message memory message
scrolls with adjustable speed built-in message editor built-in RS232
interface for easy message uploading and displaying free interfacing
software available. DATA
SHEET
Applications: At exhibitions, for advertising, to greet visitors at the
front door, as name tag, as serial controlled display in equipment, ...
Specifications:
power supply: 9VDC / 100mA
dimensions: 4.5" x 1.7" x 3.0"
- RS232 interface software for easy message uploading and displaying.
MK158.zip
MK158 $32.95
HP
CRX-48Z Interface Cable
These cables are about 2 feet long and bear HP's p/n
A2091-62004 on them, made with 3M components, new , bagged.
Limited quantity available. These go to the graphics board from the processor,
80 pins on each end.
25W029 Unit Price : $14.95
IEC
Male Snap-in Power Socket 50 pieces
These are typical snap in type ac receptacles found on
the back of modern electronic equipment. The price here is for a bag of fifty
pieces. They snap into a 1" x 3/4" hole and are secured by their built in
locking tabs.
25J012 Unit Price : $17.50
Sekinos
Projection TV Lens Assembly
Sekinos p/n SSM-200(50) projection TV lenses, these
can be used singly for b/w TV applications or as a set of three in RGB
applications. Each lens has a focusing mechanism which is secured by a wingnut.
These are a dead ringer for lenses we used to buy out of Ohio for a hundred bux
each.
Anyway they are a very crisp, distortion free plastic lens with all sorts of
possibilities. The measurements are 3" deep, 4.5" diameter fl=50mm.
25L023 Unit Price : $4.95
Digital
Projection RGB Assembly w/Precision Prism
This hardware was used to project full color digital
images by combining images from three different colored images of red, blue, and
green. A very clever (and lovely looking) dichroic prism assembly divided light
from an arc lamp into three different color channels to illuminate each
"silvered" micromirror display. The micromirrors would reflect the light back
the way it came based on how the elements in the array are switched on or off to
create each color image. The reflected images are visible through an output
opening where the projection lens (not present) would be mounted.
One end of the device has something that looks like an eyepiece and could
provide a fine view of the micromirrors, if they were present and if the
"eyepiece" didn't have a element in it that looked like window version of a
disco ball (a refractive beam integrator). An arc lamp was supposed to shine
into that "eyepiece" and the shape of the arc spot was to be "smoothed" by the
integrator. If this is removed we would be looking into the prism assembly and
see three different colored views through the prism faces where the micromirrors
went.
After the integrator is a turning mirror at "wrist" of the device. This is a
"cold mirror" that only reflect visible light and lets IR pass. This is
important because they don't want to cook the micromirror devices with heat, as
the visible light alone is enough lost energy.
After the cold mirror is a fast multielement coated condenser assembly that
looks like a good photographic lens. It would be a good lens for a small film
chip, but here its purpose is something else. This lens is designed to project
an image of the integrator into or beyond (to infinity, as a collimator) into
the center of the projections lens (not included). The purpose of the condenser
lens was also to collimate the light so that the dichroic prism would work
correctly as the coatings are angle sensitive.
After the the lens the elbow of the device appears to be a fixed front surface
mirror designed to redirect the light from the lens into the prism assembly. The
prism assembly is designed to break white light into red, blue, and green
channels. The light is reflected off of prism faces that only reflect those
colors towards the windows where the "silvered" faces of the micro-mirror spatial
light modulators would have displayed their bright faces. The bright image on
these faces would be returned along the incoming light path and be recombined
where they were separated. Some of the image would reflect back towards the arc
lamp, but half of it would exit from the open face of the prism that affords the
view of all color channels. If the device were assembled and working the view
would be of the brightest and smallest color TV you had ever seen. That would be
the image projected by the absent projection lens.
It is clear that this die cast housing was precision machined, all of the parts
were very expensive, the lens appears to be best as a collimator, and the prism
is a fine piece of work. The prism assembly actually holds the three displays at
45 degree angles to present the "right" image at the output. The facet angles of
the prism are complex, and these probably cost hundreds of dollars if purchased
new and individually, if you could by it....
Ah, the wonders of surplus. You wonder, "What can I use this for?" There are
many interesting answers. One is making your own color separation camera with
3CCDs or film drives. Or perhaps you would like to divide white light into three
separate color channels. The collimating lens alone could be worth the price of
the assembly. this lens only seems to handle a point of light on axis very very
well. Light reflected from the micromirrors also is dumped into the housing and
conducted to fins for cooling.
25L024 Unit Price : $99.00
Crystal
Radio Bonanza Book
You'll find 20 complete projects in this great Crystal
Radio book! Each project has step-by-step instructions, parts lists, photos and
schematics. Build a simple radio from a closet rod, or a more complicated TRF,
1-Tube Radio. Also included are projects modeled after old radio articles, like
the Radio in a Greeting card that you make a and then mail it to your radio
friends. Many of the projects have templates for coil forms and front panels.
You'll find plans for Gilligan's Radio to make a receiver out of stuff around
the house such as tin foil, mailing tubes, and wire! Included are simple
projects that are fun to build with kids, like the little radio based on the
"Knight" kits from the 1950's Allied Radio kits. In addition there are
increasingly harder projects for those wanting to build more complicated sets
including circuits with series/parallel antenna tuning, full broadcast band
tuning, and a tuneable wavetrap. There are projects based on Alfred P. Morgans
1918 book,
"The Boys First Book of Radio and Electronics," along with more advanced sets
like the AM Loose Coupler that was used by the Navy in the early days. You'll
also find other articles showing how to build radio components like capacitors
out of modern CD's and headphones out of shoe polish cans. Build a big loop
antenna around your doorway like they did in WWII to hide their radios from the
authorities...also learn how to fix up those old antique headphones you bought.
All these projects were originally seen in our newsletter volumes 9, 10, and 11,
so whatever level you are at you'll find more than a few projects to keep you
busy! Get a copy today!
25X009 Unit Price : $14.95
BNC
Inline Female for RG-6
BNC inline female connector for RG-6 cable; two piece
crimp style.
CB091 Unit Price : $1.89
Type SMA Triple Female Adaptor
Type SMA connector triple female (F-F-F) machined
brass bright plated.....
CA911 Unit Price : $3.49
Genuine
VU Meter from Scully Recorder
This is the subassembly from a Scully professional
tape deck.
Included is the nice 4 x 3" VU meter and all the associated circuitry just as it
was unplugged from the Scully.
25Z103 Unit Price : $29.95
Carol
SPT-1 AC Zip Cord
Carol Cable type SPT-1, ac power cord 18/3 ribbon
style, yellow, 250 ft spool offered here. 300 volt insulation.
The whole spool; one price.
25W030 Unit Price : $35.00
Carol
Type FPL Tray Cable 4 x 18ga.
Sold by the foot Carol 4 conductor 18ga solid cable
with drain wire and foil shield. Made in USA UL105, red jacket.
25W031 Unit Price : $0.12 per foot
Gavitt
2-cond 22ga Tray Cable
Gavitt tray cable sold by the foot; two conductor #22
solid with drain and foil shield. Gray sheath, black and clear wires.
25W032 Unit Price : $0.10 per foot
Belden
9614 by the foot 9 Cond Flex
Buy the foot Belden 9614 9 conductor x 22ga. stranded
instrumentation cable.
25W033 Unit Price : $0.39
Anixter
B16/19 16ga Stranded Hookup Wire
Blue PVC jacketed hookup wire 1000' spool 16 gauge x
19 strand flexible tinned copper. Sold by the spool.
25W034 Unit Price : $35.00
Belden
9533 Communications Cable 3-cond #24
Sold by the foot Belden 9533 instrumentation cable
features
grey PVC jacket, 3 conductors # 24 plus drain and beldfoil™
shield, 300 volt insulation.
25W035 Unit Price : $0.15
Storm
14ga Stranded Wire 1000 ft.
1000 foot spool of Storm Products 14 gauge stranded
hook up wire 41/30 white PVC jacket nice and flexible sold by the spool
only.
25W036 Unit Price : $175.00
Carol
Type CL2 2 x 24 Jacketed Cable
Buy the foot; Carol type CL2 2-cond 24ga grey PVC
jacketed cable good for thermostats, speakers etc outdoor applications OK; 300V
insulation, sunlight resistant, made in USA.
25W037 Unit Price : $0.10
Swagelok
3/8" Push-on Hose
Swagelok "push on" style 3/8" (9mm) type WP 300psig
(20 Bar), flame resistant red general purpose hose. This isn't ordinary air hose
or the like this is pedigree stuff; sold here by the foot.
See spec sheet for details.
25Z104 Unit Price : $0.35
Swagelok
3/8" General Purpose Hose 250 ft spool
Full 250 ft spool of this neat Swagelok 3/8" push on
style of air hose...er whatever it's good for temp range -40 to 200 deg. This
red hose looks like airline, should be of interest to hot-rodders.
25Z105 Unit Price : $69.95
Southern
Cross 8748-49 Burner
A simple burner for the 8748 & 49 micro controllers.
Software loads intel HEX or binary files from your PC. Performs blank check and
verify. Software provided to read an 8748 or 49 into PC.
SC16 $29.95
2.25"
Mini Speaker 8 Ohms
Miniature PM speaker with powerful magnet. Rated at 8
Ohms. 2-1/4" in diameter 3" leads with spade lugs attached.
25V004 Unit Price : $0.89
Black
Knurled Knob
These shiny black knobs feature a 1/4" shaft hole and
a missing setscrew along with their attractive knurled perimeter. Large quantity
available in both left and right turning models.
25Z107 Unit Price : $0.49
34
pin IDS Jumper Cable
Blue ribbon type jumper cable with 34 pin female T&B
Ainsley IDS connectors at each end 6" long.
25W039 Unit Price : $0.89
Bright
Metal Hole Plug 7/8"
HH Smith p/n 608 Hole Plug (this is right off the box
folks), bright metal finish made to snap into a 7/8" hole to cover an adjusting
screw or to cover up a goof. Hint if you mistakenly make a 5/8" hole in the
wrong place; ream it out to 7/8" and put one of these in, if that's happened a
hundred times on the assembly line...that's ok we'll probably sympathize and
give you a break on a carton.
25Z108 Unit Price : $0.35
Miniature
PM Speaker 2.25"
Eaton loudspeaker p/n S 302 rated at 8 Ohms,
0.2W. These measure 2.25" in diameter and 1" deep. Solder tabs have been
thoughtfully provided to facilitate connections to the outside world.
25V005 Unit Price : $0.69
Small
Oval Loudspeaker
New, individually boxed oval (1&7/8" x 2&7/8") 8 Ohm,
0.5 Watt mini speakers. These are about 1.25" deep and are available here in
copious quantities.
25V007 Unit Price : $0.89
5-conductor
Mini Connector Jumper Cable
This is a 14" five wire jumper cable with the same
female sound card type connector at each end.
25W041 Unit Price : $0.59
Power
Pigtail w/ Berg Connector
A Berg type 2 pin female connector (like the ones we
see on PC internal speakers) with 4" of jacketed twisted pair #16 wire affixed.
25W042 Unit Price : $0.49
3-pin
Power Jumper
Three inch 3 conductor power jumper cable about #20 solid wires, IDC
connectors at each end.
25W043 Unit Price : $0.49
6-conductor
Jumper Cable
Six wires (about #20)comprise this 21" IDC cable with
identical female connectors on each end; these are the typical connectors that
plug onto SIP headers .010" spacing.
25W044 Unit Price : $0.49
Large
Plastic Knurled Knob
These are really nice knobs, made for a round 1/4"
shaft and secured by TWO setscrews (included), and measuring 1.75" dia. x .8"
deep with knurls all round. The groove around the perimeter if the face
makes them qualified for groovy, knurly knobs. These are however kinda aqua blue
in color.
They'll go well on your swimming pool accessories. Made in USA by Rogan Bros of
Skokie.
25Z109 Unit Price : $0.99
Groovy
Aluminum Knob
These knobs will look good on anyone's front panel;
flat finish brushed aluminum goodies made for round 1/4" shafts and come with a
setscrew. These are made by Front Panel Devices of Inwood, NY as their part
number 4006-0031 and measure about 1/2" dia x 3/4" deep. Inquire about discount
price when buying boxes of 100.
25Z110 Unit Price : $0.49
Black
Knurled Index Knob
Rogan of Northbrook made these nice heavy black
plastic knurled index knobs which fasten to a 1/4" round shaft with two
setscrews (included). The white index spot is moveable; simply rotate the knob
to the left or right. Each unit has a metal insert and measures approx 1&3/16 x
11/16"; made in USA top quality item.
25Z111 Unit Price : $0.69
2
x 4 Rotary Switch
Two position four pole (4PDT) rotary switch; typical
make-before-break with 1/4" metal shaft and tab to keep it from twisting in the
panel. We don't have the specs for these but typically they are rated at about
an Amp at 120 V.
25B044 Unit Price : $2.49
DB-25
Hood Pack of 50
Bag of 50 pieces of grey plastic hood for DB-25 male
or female connectors. Cable exit is on top and all hardware is included; each
pair of shells and the hardware are individually bagged. Feel free to inquire
about special higher unit pricing if less than fifty are required.
25J013 Unit Price : $12.49
Radial
Electrolytic Cap
1000uF 50V Nippon Chemicon radial electrolytic, measures 16 x 40
mm.
1000R50 Unit Price : $0.79
Fahnestock
(Fanstock) Clip; Double
Large double Fahnestock clip ideal for microwave
breadboarding, crystal set demo or hooking any two wires up to about size 10
together. Measures about 2 x 1/2 x 3/8 " Good for old fashioned model train
layouts.
25J014 Unit Price : $0.29
BNC Male for RG-58 and RG58A/U
These are two piece (the center pin is fast in the connector)
crimp type connectors for RG58 and RG58A/U. This type of BNC
is available in other cable sizes by special order.
CB079 Unit Price : $1.39
3-AMP
Microstepping Driver Kit
