COMMUNICATIONS & ELECTRONICS

Little is the operative word here. These surface-mount LEDs are perfect for hobby trains, dollhouses, even flashlights, anywhere you need tiny but bright lights. Color is white with a luminous intensity of 1000-1300 mcd (millicandelas), 2.8-3.4 volts, and a color temperature of 6500K. View angle is 140 degrees.

Jarvis Says: These require soldering so if you are not familiar with the process these are not for you.

People say they just can’t help buying these 1,700 surface-mount device resistors. That’s (20) pieces each at (85) different values between 1 ohm and 10M ohms, with a 5% tolerance. Don’t even try to resist these.

You’ll ace every test you sit through without even cracking a book when you score this Transistor-Diode Tester from Elenco®. Model DT-100. Checks transistors and diodes in a circuit. Identifies NPN or PNP transistors, and cathode and anode leads. Has a test button, and a dial-base current control. Instructions included, fresh 9V battery not included. Measures 6-1/2" x 4 x 2". Bring on the tests.

The manufacturer, Elenco Electronics, says Bredblox, but what's in a name? This is just a nice little breadboard for electronic experiments. The Elenco Model 9830 measures 6-1/2" long x 2-1/8" wide x 5/16" thick with (2) power busses up both long edges and (63) double rows of more busses. The holes for components and jumper wires are approx .050" each and multiple boards can be interlocked via tabs and ports on the long edges. Now go invent something and get rich.

You get a 10ml syringe of white silicone heat sink compound for use as a thermal coupling for electronics. High conductivity, low bleed and stable at high temperatures. Perfect for you electronic tinkerers out there with a sinking feeling.

Good things come in little packages. In this case the package is a 1-1/4" x 1-1/4" x 1/2" modulator, and the good things are a circuit board with at least a trimpot, electrolytic capacitor, assorted coils, 3-pin connector, RCA plug and (2) pop-off covers. Have a blast.

Like a third hand in the electronics lab, this circuit-board rack from Elenco® has a pair of stable 6-1/2" legs and 3" tall arms with clips, one spring-loaded, to hold the board. It's a must for any electronics DIY-er. Adjusts from 0 to 9-3/8" apart and lets you rotate the board it holds a full 360 degrees. Both clips and legs lock with thumbscrews.

Don’t even try resisting, because you can’t. But this 10K-15K Ohm Photoresistor (aka Photocell, aka the thing that turns stuff on and off based on light levels) does nothing but resist. Sort of. It’s a light-dependent resistor that operates at 2K Ohm at 100 LX (that’s 3 feet from a 100W bulb), and 10K Ohm at 10 LX (12 feet from a 100W bulb). Rated for 100VDC, 35 mW power dissipation. Measures approx 5mm dia, and we’ll send you (5) of them. Made in Hong Kong.

When you could just order this 480-pack of 1/4 watt, 5%-tolerance resistors. You'll get (30) pieces each of 10, 22, 47, 100, 220, 470, 1K, 2.2K, 4.7K, 10K, 22K, 47K, 100K, 220K, 470K, and 1M OHM.

We have discovered a great source for inexpensive IC chips in all your favorite flavors. Please check the list above and make your selection today! Click on each item for a general Spec. sheet or contact us for a full Spec. sheet. INFO@SCIPLUS.COM or 888-724-7587

We’re unsure what this take-out was taken out of, but it’s a 2-1/4” x 1-3/4” PC board with comparator IC (integrated circuit), plus (1) yellow and (4) red LEDs, assorted resistors and a trim pot. Also, red and black leads with inline ring terminals, and a momentary push-button switch.

Velleman brings you this clear enclosure for Rasberry PI Modules. Velleman model number RAS-CASE001 . This unit measures 3-5/8” x 2-1/2” x 1” and includes screws and feet. Has holes for the connectors and ports on some of your favorite Pi models. Fits Pi B+, Pi 2 Model B, but you can use it for all your small electronics projects, we won't tell.

This solderable perf board for the electronicshobbyist measure 1-1/2” x 1-3/4” x 1/16” or 3-1/4" x 2-1/2" x1/16" with 1mm dia copper pads on one side with holes sized for componentleads. Has 1/8" dia mounting holes on the corners.

This little aluminum heat sink measures 1" square x 5/8" with (4) 5/8" tall fins and a threaded 3/32" bore.

These liquid crystal displays are raring to go. As soon as we can get Mary Ann to stop playing with them we'll pick out (5) assorted displays for you. (She keeps zapping them with static electricity to see what pops up. Mary Ann is easily amused.) Sizes range from 1-3/16" x 2" to a few as large as 5" x 10". They're unused. Some have pin leads, some have traces right on the wafer. Either way, they're a terrific bargain.

You pick the 500-Ohm 1/2W, 1K-Ohm 1/2W or the 10K-Ohm panel-mount potentiometer, all from Alpha Products® with dust covers over a 17mm base, panel tabs, 6mm dia x 10mm long shafts, and 3mm solder lugs with washers and nuts. Shafts are knurled and slotted, and single-turn. Turn them with press-fit black plastic knobs, 6mm ID x 16mm dia x 18mm tall with pointers in assorted colors of red, orange, yellow, blue, green and white.

This 3.2" square LCD display from a new Epson® print replacement part has an SCI7500F0A MLS driver chip, and measures 3-1/2" x 2-5/8" with a 15-pin ribbon connector. Made in Japan because that’s where Epson’s from. “Epson” means “Son of Electronic Printer,” by the way. You think we’re kidding.

Remake, recycle and reuse this repurposable Personal Response System remote. Made for answering test questions in college classrooms, this PRS TX-02 remote is now discontinued but full of lovely parts and waiting for a new electronic home. Inside you'll find a 940nm IR LED, a 12-digit touchpad, 2-C9015 PNP transistors, a red/orange/green LED, a 3.5795454 MHx crystal and a couple of ICs. As is, no guarantees. And let's keep it legal, OK?