COMMUNICATIONS & ELECTRONICS

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.

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.

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.

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.

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

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.

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.

Grow your own computer. This pre-wired Raspberry Pi 2 model B circuit board is essentially a palm-sized computer that you can hook a keyboard and monitor to, using it to learn computer science and coding, run a pet camera, open and close the door of a chicken coop, or write the great American novel. Make a personal weather station or a DIY gaming system; you’re limited only by your imagination and ingenuity. Has a Broadcom BCM2836, an ARM Cortex-A7-based quad-core processor that runs at 800MHz. You’ll be running Linux via a micro-SD card (which you supply) and 1 Gb of on-board memory. You’ll need a 2A power supply source into the micro-USB input. UL. Add a few bucks and put the whole little shebang in a clear ABS plastic case, 3-5/8” x 2-1/2” x 1”, that includes screws and feet.

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.

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 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.

We searched the world over to find a good source for the most popular transistors. Success! Check out our listing and pick your favorite. Click the item to view the pin outs.

This black aluminum heat sink measures 4" x 2" x 1-1/14" with a 2" x 2-1/4" base. (6) 5/16" thick fins at the top and a set of (5) more at the bottom above the base. In between the fins is a 1-1/4" x 2" space for your chip with a 1-1/8" square thermal pad and a 3/16" bore.

These 15uH chokes are encased in clear heat-shrink tubing with pre-soldered jumper leads. Rated for up to 4A and measure approx 4-1/2" long. Made in Germany.

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?

These plastic potentiometer knobs are for 6mm knurled shafts and measure 25mm across the bottom and 19mm in height and across the top. Knobs are knurled with a pointer. We’ll pick from gray and dark brown versions.