If you’ve ever had assorted clear LED bulbs, then you almost certainly needed to test them to see what color light they emit. A breadboard can work just fine for this, but I actually got to wondering one day if there was a LED socket for 3mm, 5mm and even 10mm LED bulbs.
So what’s new at mklec? Lots of things! We’ve redesigned our store website and we’ve been working hard to bring you more great new products at the lowest prices possible. One such new product is our first lot of new 20 AWG Stranded Tinned Copper Hook-up Wire, currently available in Red, Black, Green and White with more colors to come and can be special ordered upon request.
If you’ve browsed through our store, you may have noticed several of our components have the brand name mklec Select. But have you wondered what exactly is the mklec Select brand?
mklec Select is a brand we use that identifies our budget-friendly components. These are quality components that may vary in brands and manufacturers and are targeted towards being a low-cost solution for general projects and for prototyping purposes. We don’t guarantee you’ll get any specific manufacturer on these since it varies based on what our suppliers have in stock, however we will strive to provide you with the best manufacturers in the budget price range at no additional expense to you.
We’ve had a very busy past few weeks and we’re striving to get all of the great new products we have in stock added to our website. One of those new products is new 1-Watt High-power Blue LED Beads with an output rating of 90lm – 100lm. These are in addition to the 1-Watt White LEDs we have for sale and of course you can use our OSKJ 1.5v – 30v 3A DC Constant Current Power Buck Converter as a driver for them to safely regulate the voltage and current for these LEDs.
Want more colors? Please contact us and request other colors and we will get them ordered for you if we haven’t already got them. We’re here to serve you and these are great little super bright LEDs for a variety of DIY projects.
It has been very busy lately, which is a good thing. We’ve had the privilege of serving many new customers and we’ve also added many new products to our store, one of which is this OSKJ Buck Converter DC Voltage and Current Adjustment Module.
Upon recently stocking the BA1404 FM Transmitter IC chip, I began to build a transmitter using one and I realized that 38KHz oscillator crystals are needed, so I ordered several of them and we now stock them for your convenience. You can get yours from our store at http://mklec.com/38khz-crystal-oscillator.
About a year or two ago I discovered an iPhone app called “Sound Grenade“. It produces a very high frequency sound that is very irritating if you can hear it. I am fortunate enough to not hear it, so it was fun turning it on and watching those around me squirm and squeal about that awful noise and trying to figure out where it was coming from.
I recently began to wonder if a “sound grenade” or “high-frequency” sort of device can be made using simple electronic components. FYI, the frequency range begins at 8Khz, then progresses to 10Khz, 12Khz, 14Khz, 15Khz, 16Khz, and 17Khz. A video demonstrating this range can be found at http://youtu.be/LNjPmhbPc9I. After much research, I discovered such a circuit can easily be built using the 555 Timer and a small 8-Ohm speaker. I’m not sure what the full range is on this since I cannot hear the sound above a certain range and my wife is unwilling to help since it’s very discomforting to hear. I also do not have an oscilloscope to test it with.
QUICK NOTE: This does NOT have a pull-pin or a delayed timer to it nor is it designed to be thrown like a real grenade. The app doesn’t either and so the idea was to imitate the app’s behavior. For that type of project, you might have a look at http://imakeprojects.com/Projects/sonic-grenades/ or http://www.instructables.com/id/Sonic-Grenade-from-Mostly-Scavenged-Parts/.
The ROHM BA1404 DIP-18 IC is a truly unique chip. With this IC and a few external components, you can build your own stable FM stereo transmitter. That means you can make your own wireless FM microphones, pirate radio station, and car stereo transmitter so you can play your MP3/iPod/iPhone music through your car stereo with clarity. The great thing is this chip operates on a single 1.5 AA battery and features low power consumption. If you don’t have one yet, you can get yours in our store at http://mklec.com/ba1404-fm-stereo-transmitter-ic
There’s a few crucial external components you will need to build this circuit. I’m going to be using the circuit found at http://www.electroschematics.com/54/ba1404-fm-stereo-transmitter/. I’ll make a complete parts list soon, but the main things outside the standard components is the 38KHz oscillator crystal and the 3.5 turns RF coil.
We’d love to hear from you on your experiences with this IC and even show off your build. Please feel free to post a comment below and/or visit our Google+ Community and share there.
I’m pleased to announce a new product we’re carrying … 29mm (1-1/8in) diameter small/mini speakers. These small project speakers are excellent for audio output applications where a small, lightweight speaker is the most ideal choice.
These are rated at 8ohms 0.25watts.
We’ve added another assortment pack to help starters/hobbyists/enthusiasts/etc. stock up on a variety of products. We’ve assembled a diode assortment value pack that includes 1N4148, 1N4007, 1N5819, 1N5399, 1N5408, 1N5822, FR107, and FR207 diodes.