Koncocoo

Best Signal Components

FiiO D3 (D03K) Digital to Analog Audio Converter With Micca 6ft Optical Toslink Cable - 192kHz/24bit Optical and Coaxial DAC
Therefore, it is important that the digital audio output of your device defaults to or can be set to PCM/LPCM output. Feature Highlights - Built-in high-performance phase locked loop (PLL). - WM8805 ultra low jitter digital receiver. - Supports up to 192KHz/24bit audio signal. - Optical and coaxial inputs with selection switch. - 2 channel standard stereo RCA output. - Indicator for digital receiving status (LOCKED). - MINI USB power supply port (AC adapter included). Converts coaxial or optical digital audio input to analog stereo output over RCA and 3.5mm mini jack.
Reviews
"I bought the Fii0 D3 to connect the TV to a set of speakers and to a headphone I use when everyone else go to bed. Its a simple problem to live with because it only lasts the short time it takes to shut off and turn on the receiver box."
"Included in the package is a small yellow sheet with a disclaimer indicating that the device does not decode Dolby Digital. Since Dolby Sound is extensively used in television programing, including commercials and old sitcoms, it is probably not the best product for this particular purpose."
"The device works great and solved my issue of converting the Playstation 3's optical output to analog."
"I recently bought a new flat screen Panasonic TV and was surprised to find that the only audio output was optical/digital, no longer the red/white RCA analog jacks that I have been using to feed my external speakers."
"I am by no means an audophile, but this little buddy helped me distinguish between 24 bit FLAC audio and 320 kbit MP3s."
"I bought this digital/analog audio converter as a gift for my brother, because he had just splurged on a high-end 55 inch LG TV but only had a 10 year old but good quality stereo-only amp to use for expanded audio."
"I moved to a new place with Google Fiber TV recently and neither the TV box nor the TV has analog outputs, so I had no way of using my Sennheiser wireless headphones."
"Why these high end televisions have deleted the simple audio out jack/plug for headphones is beyond me."
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PROZOR Digital to Analog Converter DAC Digital SPDIF Toslink to Analog Stereo Audio L/R Converter Adapter with Optical Cable for PS3 XBox HD DVD PS4 Home Cinema Systems AV Amps Apple TV
PROZOR Digital to Analog Audio Converter converts coaxial or toslink digital PCM audio signals to analog L/R RCA and 3.5mm Jack audio. PROZOR Digital to Analog Audio Converter: Converts coaxial or toslink digital PCM audio signals to analog L/R RCA and 3.5mm Jack audio simultaneously ( not capable of being reversed).
Reviews
"This converter box is all you need to connect your stereo headphones to a TV that does NOT come with a 3.5 mm port but instead features a DIGITAL AUDIO OUT port. After removing the caps, you plug one end into the port labeled “digital audio out” or “digital optical audio out” or “SPDIF” on your TV and plug the other end into the port labeled “SPDIF” on the Prozor box."
"This allows me to keep my HDMI cable plugged in to the monitor and send a stereo cord to the PC to share the speakers on my desk."
"Used this to connect the Digital Toslink Optical output from our new UHD TV thru an older receiver that uses RCA jacks."
"No problems, no issues with the unit."
"The connection on one of the cables was not working at first since it didn't want to sit in tightly, but I simply reversed the ends and the got was more snug."
"My husband has had the same sound system for 20 years and can't part with it."
"I used bought these since my Samsung 4K Tv doesn't come with a 3.5mm headphone jack...it was my first samsung that I bought since the 2006, 720p days and all the ones I've been buying were china brand (cough hi-sense)."
"worked well, I was able to convert my RCA stereo system, it now works perfectly with my LG LED 2010 Model TV."
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AudioQuest - DragonFly Black USB DAC/Headphone Amplifier
Breakthrough Sound, Great Versatility, Simple to Use, Generous Compatibility: Multi-Award-Winning AudioQuest DragonFly Black USB DAC/Headphone Amp Plays With Authoritative Realism Playing music on your computer, laptop, stereo, smartphone, tablet, or powered speakers becomes exponentially better, more authoritative, and stunningly lifelike with the groundbreaking AudioQuest DragonFly Black USB DAC/headphone amplifier. 32-bit ESS 9010 Sabre DAC.
Reviews
"If I just plug in my HD6xx directly into my laptop, the sound level needs to be at least 40/100 before I get sufficient volume."
"one of the best value i can find out there... even with the price of the dragonfly tail and the nice speakerwire to go to my speakers, i find this more affordable than other similar (sound) quality setup."
"The negative is that with the dragonfly the battery is drawn down more quickly."
"This dac has exceeded all expectations in terns or sound quality, build quality, upgrade process, simplicity of use... and works great with Roon!"
"I imagine it would improve sound coming from a laptop."
"Loved it while I had it."
"This is a very good DAC that works well with computers and Android products."
"It certainly improves the sound from either my laptop or my LG G4 that's for sure.However, I cannot get it to output sound to a powered speaker which is what I purchased it for whether the source is the phone or computer ?...works just fine and sounds terrific with headphones.Still,I gave it 5 star rating for sound quality.If your phone especially has a lousy sounding dac in it the Dragonfly black will yield better sound quality."
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Best Signal Amplifiers

ADS1115 16-Bit ADC - 4 Channel with Programmable Gain Amplifier
To get you started, we have example code for both the Raspberry Pi (in our Adafruit Pi Python library) and Arduino (in our ADS1X15 Arduino library repository) Simply connect GND to ground, VDD to your logic power supply, and SCL/SDA to your microcontroller's I2C port and run the example code to start reading data.
Reviews
"Works well with both Arduino and Raspberry Pi."
"Pefect for current shunts and other low output sensors."
"That said everything hooked up to my Raspberry Pi B+ I2C buss extremely easily and the well done example code is a breeze to get the ADS1115 running in single-ended and differential modes with very little effort."
"Easy to use with publicly available libraries and example code."
"The chip requires more code to support operation ... a lot more. An external power supply is a good thing: a DROC regulated voltage module (available thru Amazon) lives up to its claims, is easily powered with an older e.g. 18V laptop power supply, and thereby improves on reading precision."
"High resolution via programmable settings."
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Best Comparators

Texas Instruments LM393P LM393 IC Dual Differential Comparator (Pack of 10)
These devices consist of two independent voltage comparators that are designed to operate from a single power supply over a wide range of voltages.
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Best Signal Converters

FiiO D3 (D03K) Digital to Analog Audio Converter With Micca 6ft Optical Toslink Cable - 192kHz/24bit Optical and Coaxial DAC
Therefore, it is important that the digital audio output of your device defaults to or can be set to PCM/LPCM output. Feature Highlights - Built-in high-performance phase locked loop (PLL). - WM8805 ultra low jitter digital receiver. - Supports up to 192KHz/24bit audio signal. - Optical and coaxial inputs with selection switch. - 2 channel standard stereo RCA output. - Indicator for digital receiving status (LOCKED). - MINI USB power supply port (AC adapter included). Converts coaxial or optical digital audio input to analog stereo output over RCA and 3.5mm mini jack.
Reviews
"I bought the Fii0 D3 to connect the TV to a set of speakers and to a headphone I use when everyone else go to bed. Its a simple problem to live with because it only lasts the short time it takes to shut off and turn on the receiver box."
"Included in the package is a small yellow sheet with a disclaimer indicating that the device does not decode Dolby Digital. Since Dolby Sound is extensively used in television programing, including commercials and old sitcoms, it is probably not the best product for this particular purpose."
"The device works great and solved my issue of converting the Playstation 3's optical output to analog."
"I recently bought a new flat screen Panasonic TV and was surprised to find that the only audio output was optical/digital, no longer the red/white RCA analog jacks that I have been using to feed my external speakers."
"I am by no means an audophile, but this little buddy helped me distinguish between 24 bit FLAC audio and 320 kbit MP3s."
"I bought this digital/analog audio converter as a gift for my brother, because he had just splurged on a high-end 55 inch LG TV but only had a 10 year old but good quality stereo-only amp to use for expanded audio."
"I moved to a new place with Google Fiber TV recently and neither the TV box nor the TV has analog outputs, so I had no way of using my Sennheiser wireless headphones."
"Why these high end televisions have deleted the simple audio out jack/plug for headphones is beyond me."
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Best Digital Signal Processors

Southwire Tools & Equipment 16040T Compact Auto-Ranging TrueRMS Digital Multimeter with MApp Mobile App
Style: 16040T. ENHANCED FEATURES: TrueRMS - Higher accuracy on AC circuits, 10 measuring functions, plus MAX/MIN, Powerful built-in work light, 4000 count backlit display and CAT lll 600V, UL listed. SATISFACTION GUARANTEED: At Southwire, we strive to ensure that every product we develop helps increase safety, improve productivity, reduce manpower, save time and save money - both on and off the jobsite.
Reviews
"I have become addicted to Southwire tools and test equipment."
"Great tool, wish I had one sooner."
"The best multi-meter i've ever owned I use the bluetooth on this unit in real world applications all the time."
"OVERALL: I really wanted to love this meter, but bugs in the data collection and file transfer are unacceptable at this price. Compared to my old Radio Shack Extech 22-816 with its dim gray LCD, this thing is a sight to behold. It feels tough, like it could bounce around on a real jobsite without breaking. And the lithium battery is replaceable so when it finally wears down you don't have to chuck the whole thing. The meter ran for several hours after a mere 10 minute charge. The screen is soft plastic and shows faint scratch lines after being cleaned with flannel. I pried open the four segments of its internal post using the pointy tip of the negative probe, and that fixed it. Which is a problem for doing overnight data acquisition, because it means you need a full charge before starting. See below: BUGS. ---. Disclaimer: I'm using the Android app on a Google Nexus 4 phone. Word to the wise: try powering off/on the multimeter just before telling the phone to search for nearby devices. Three times I got to 98% complete on the import after 10 bleepin' minutes, and it stopped. I finally managed to get the one big file loaded by deleting every other saved recording on the meter, then re-importing. I can't for the life of me guess how they goofed, but even though the meter is set to 20NOV2016, the data file gives the date as "12-11-0186". Sure, you can figure it out if you think about it, but it's one more bug making the whole data integration feel like an afterthought. Sure, the battery won't last much longer than that, but assuming the battery could be made to last longer why hardcode a 10 hour limit on the duration of data collection in the phone app? .. III) If you select max/min before data logging you will get readings with precision of FOUR digits after the decimal instead of only one. TLDR; this is a very useable, functional, powerful, beautiful meter suitable for professional work and even basic data acquisition."
"Item is as described and works perfectly."
"I primarily use it for DC power, when working on my motorcycles and installing new electrical components. The multimeter is easy to ready, intuitive to operate, and feels like it can survive some bumps and falls without breaking. It would have been nice is they would have made the probes long enough to stick in the outlet and stay without holding them."
"One person said it didn't have a glass or plastic cover over the display, well that is wrong. I have seen much worse, but the meter isn't very fast under the continuity setting and that can be related to the probes. It seems to be well made and the rechargeable battery is a nice thing to have. The fuse is easy to access under the battery cover as well. If you are looking for a quality meter with a color display, then this is really the only game in town, as I have never seen a color display on any portable DVOM."
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Best Diodes

Haobase 100Pcs 1A 50V Diode 1N4001 IN4001 DO-41
100x 1N4001 Diode 1A/50V.
Reviews
"They prevent current flow from one direction and allow it from the other."
"Great deal."
"They are diodes."
"Worked great for my automotive fan circuit, allowing the ac compressor solenoid to power the fan switch but preventing the temp switch from back-flowing and operating the solenoid."
"99 of them worked as expected, the last one I can't verify because I dropped it in my shag carpet and can't find it... Shame..."
"Very good price for high quality diodes."
"Absolutely perfect!!"
"They're diodes, they work, only needed 3 but it was cheaper to buy the 100 pack here than to buy 3 anywhere else."
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Best Logic Products

Gund DC Comics Batman Malone Plush, Black, 12"
About Gund: for more than 100 years, Gund has been a premier plush company recognized worldwide for quality innovative products. Enter your model number to make sure this fits.
Reviews
"I had bought my son batman Malone bear in the pajamas and the material of his outfit is cotton and soft and huggable. I’m guessing that Batman in the pajamas is meant to be a cuddly bedtime bear so they used softer materials."
"I bought it for a Christmas gift for my nephew and he loved it too."
"Gotta love a Gund!"
"Both the Robin and Batman's clothing are not removable, which I like since it means my boys won't lose them!"
"Bunny goes with her everywhere and it is a good introduction for any young girl to the comic book world."
"My 5 yr old loves it."
"Bought this and sent it to our granddaughter for her birthday!"
"I love the costume, just wish the bear was a better quality--it feels a bit cheap."
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Best Microprocessors

Teensy 3.2
The 32 bit processor brings a few other features to the table as well, such as multiple channels of Direct Memory Access, several high-resolution ADCs and even an I2S digital audio interface! Features: - More power on 3.3V pin for modules like ESP-8266 - 7 Timers for intervals/delays, separate from PWM - USB with dedicated DMA memory transfers - 3 UARTs (serial ports) - SPI, I2C, I2S,CAN Bus, IR modulator - I2S (for high quality audio interface) - Real Time Clock (with user-added 32.768 crystal and battery) - 4 general purpose DMA channels (separate from USB) - Touch Sensor Inputs.
Reviews
"As expected."
"I know next to nothing about programming, but I was able to follow some project instructions and make a few tweaks to get this working with my exercise bike as a game controller, for forward movement."
"It comes with an extremely useful printout of all the features of each pin on the board."
"It uses Arduino software which makes development a breeze and I had it working as pseudo-keyboard after about an hour including soldering buttons and writing up the code."
"No issues, this is my 4th teensy 3.2."
"this is one of the best boards out there."
"Theyre so useful and easy to use that I throw them in any project I can and they've become my go-to device for anything small that need an arduino in it."
"It's great, takes Arduino to a new level (both in size/IO count and and speed) !!"
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Best Transistors

Hilitchi 24-Values 2N2222-S9018 / BC327-BC558 NPN PNP Power General Purpose Transistors Assortment Kit - Pack of 840
• 2N2222 NPN - 35pcs. • 2N3904 NPN - 35pcs. • 2N3906 PNP - 35pcs. • 2N5401 PNP - 35pcs. • 2N5551 NPN - 35pcs. • A1015 PNP - 35pcs. • C1815 NPN - 35pcs. • C945 NPN - 35pcs. • S8050 NPN - 35pcs. • S8550 PNP - 35pcs. • S9012 PNP - 35pcs. • S9013 PNP - 35pcs. • S9014 NPN - 35pcs. • S9015 PNP - 35pcs Package Quantity: 840pcs(+/-2%) .
Reviews
"Minus one star: A datasheet with all V_CE, I_C, P_D, and f_T values would be great though."
"Nice assortment of devices to help the maker or kit builder."
"It would be considerate of the seller to put out a folder with all the spec sheets so we don't each have to spend an hour googling and downloading."
"Great assortment of general purpose transistors, NPN and with complimentary PNP in most cases."
"Good assortment and quantity of popular npn and pnp transistors."
"quality choice for my work shop, love it."
"Good assortment."
"This kit looks great and has a ton of variations of transistors but the 2N2222 models (the most used/called for) seem to be either bad or have non standard pin outs for BCE."
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Best Interfaces

Phantom YoYo 170 Points Mini Breadboard for Arduino Proto Shield (6 PCS)
Color Red + blue + black + white + green + yellow Material ABS Features With 170 tie points With self-adhesive tape on the back, make it easy to stick on the Arduino Prototype Shield.
Reviews
"They're cute, but I'm not sure what gauge of wire they're built for."
"I paid $12 for these little breadboards."
"These things are so freakin' handy."
"Solid product."
"These are very nice, tiny and perfect for my indoor solar night light projects, I want parts out and showing on some solar projects like "Solar man"!"
"Needed a few for my Arduino and Pi projects."
"The backing does set it apart from other boards, though."
"Just right for a little project and they interlock to make a bigger project."
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Best Semiconductor Timing Management Products

BOB - Screen Time Manager - Manage Your TV Time & Video Game Time
Let TV Timer BOB be the enforcer — no more “TURN OFF THAT TV!” arguments. Each child in the house (up to 6 users plus 1 parent user) has a four-digit PIN that they enter before they can turn on the attached device. (Up to five blocks per user for any or all days of the week. Quickly add bonus time or remove time from any user without changing their regular allotment.
Reviews
"I bought Bob to replace the TV Allowance we had used for years, but was not compatible with three-prong plugs or TVs that require a trickle of power. Bob had the maddening habit of shutting DVDs off when a scene with low lighting came on or the credits rolled."
"I bought this to limit TV time for our 8 year old son who also uses the video game units way too much."
"(if you want TV time on the weekend, you'll have to limit your own TV time during the week). The problem however for us was the fan on our DLP TV (and I assume you'd have the same problem with this device if you were using it with a projector). BOB had already detected the TV was off, so it had lock itself, which means it would then alarm that the TV was on and you'd have to unlock BOB so the TV could finish its cooldown."
"I was so happy with the success of the BOB for the TV that I bought a second one for our home computer because my older daughter was spending way too much time watching her TV shows via the internet. We also occasionally experience the BOB randomly shutting off the TV or the computer in the middle of using it even though time has not been used up."
"Each one has to independently remember his user number and his password. - Time settings are lost when power is cut (interestingly, other settings are not)."
"We have not figured out why it does it so I am very displeased with this because my son has adjusted to the time he has left and then gets upset when it turns off before the time is up."
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