Richard | May 8, 2018

Yi | April 27, 2018

Aaron | April 20, 2018

Luis Carlos | Feb. 26, 2018

Bob | Feb. 24, 2018

Javier | Feb. 23, 2018

Antonio | Feb. 12, 2018

Instrucctions of how to set it up properly

For ESP32 Audio developing board (ESP32-ADB)

Hi,

I received the ESP-32 Rev 2. Shipemnt was OK and it has included a litle origami. Many thanks.

I have just powered it on and I see the first screen at the OLED display:

ESP32
PCM5012 BT speaker
my device name is hogehoge_mont
Yeah! Speaker!


But I do not know and I was not able to find out clear instructions of how to proceed to have it working.
This is my first experience with ESP32 so I´m not sure what I´m missing.
I will appreciate more details. Thanks

Response from microwavemont | Feb. 12, 2018

Hello! and thank you for review!
First of all, please install
https://github.com/espressif/esp-idf
, where the setup procedure is explained in the page above.
After finishing it, please copy the source code by
https://github.com/kodera2t/ESP32_OLED_webradio
by
git clone https://github.com/kodera2t/ESP32_OLED_webradio
and execute "make menuconfig" and set your SSID and password will make your board into web radio.
Please try!

Vladimir | Jan. 17, 2018

Quick.Functioning.Exact info.Perfect.

For ESP32 Audio developing board (ESP32-ADB)

Board using for internet radio with an old speaker and 10Watt sound amplifier.
Board came with functioning software - as Bluetooth receiver/speaker. ;-)
FACIT: great :-D
Good luck to everybody

Response from microwavemont | Jan. 17, 2018

Thank you for the review! I am very happy to read your satisfaction!!

Siow Lim | Jan. 16, 2018

Zen | Jan. 16, 2018

Better than expected

For Nutube based 15Wx2 amplifier KIT with Class-D amp

Received it today by Post. Very compact but really good quality! I do not have "hum" sound.
Save me much space and solved the "hum" problem with this tiny Nutube AMP!~

Thanks for your great design!

Do you have DAC can work with this, too?

Response from microwavemont | Jan. 18, 2018

Thank you for review and I am very happy to read your satisfaction. Nutube is very sensitive to external noise source and sometimes it occurs, reported by buyers, but not everyone. Thank you!!

Anthony | Jan. 5, 2018

Awesome cape for the PocketBeagle

For OLED with 2/4-port USB HUB cape for PocketBeagle

Shipped very fast (the next day after ordering). Slim profile when the PocketBeagle is soldered directly to the stacking headers on the cape. Also the example code to drive the display works perfectly.
https://github.com/kodera2t/PocketBeagle_OLEDcape_sample

Thanks for a great design! I hope to see more PocketBeagle expansion boards in the future.

Response from microwavemont | Jan. 10, 2018

Thank you for review! I am very happy to hear your satisfaction. Please enjoy PocketBeagle!!

Franz | Nov. 16, 2017

Excellent product

For ESP32-ADB-Edge

This is my second product from Tindie. Excellent design, very good sound. I like to experiment wth them.

Response from microwavemont | Jan. 16, 2018

Thank you!! I hope you are enjoying conversation with Alexa..!

Heinrich Josef | Nov. 12, 2017

Luis | Nov. 6, 2017

Enhanced NuTube

For Nutube amp kit, a vacuum tube in new century REV2

For nostalgic reasons I found myself considering to add a vacuum tube amplifier or radio to my small desktop. As Radio Amateur I have now ended up using SDRs and computers and there is no sign of the cool colours and clear sound asociated with tubes. But never did it because of the bulky size and strong heating of this equipments

So, when I first saw NuTube it was a "love at frist sight" ;-)
Ordered the Kit and got it in less than two weeks. Carefully packaged and including two origami figures. Thank you !
With the tube in hand I found a suitable plastic box and milled a window to watch the tube in light. The idea was not only enjoying a nice audio but also "watching" the colours of a real tube. Used double side adhesive foam to fix the tube to the plastic front of the case

In this links you can download some pictures of the housed Kit
https://www.dropbox.com/s/fvenhjv06oa5nav/IMG_20171103_172948.jpg?dl=0
https://www.dropbox.com/s/1qzj81k2riqv9eb/IMG_20171103_173015.jpg?dl=0

The sound is great. I use it connected to a Roland USB and a pair of AKG headphones. There are microphonics if you tap the case, but even this
sound like a glass bell and I love it. The audio difference is remarkable but hard to be described by words. Using a Perseus SDR receiving AM
broadcast stations it resembles the best of both words, digital SDR technology and analog audio with tube flavour

But there was still something I was not satisfied about: The tube colour
The green phospore pads are too cold and there is no such a warm red from an ignited filament. Fortunately, Nutube back side is partially clear and lets light run across the tube from back to front. So, with the help of some leds which I wrongly ordered as "red" but discovered they were really orange, I assembled a kind of backlight using six 0805 leds in series

The result is perfect ! Have a look :-)
https://www.dropbox.com/s/3lqzw5qglfgnuij/DSC08480.JPG?dl=0
https://www.dropbox.com/s/z3sjeenssdb3u4y/DSC08479.JPG?dl=0

Now this really looks like a vacuum tube. A very special one, with the green pads over a nice orange red from a filament which also produces a deep sensation as the inner of the case gets iluminated. Different game ! Will be a "must" for future Körg amplifiers, hi hi

73 de Luis
EA5DOM

Response from microwavemont | Nov. 6, 2017

Thank you for wonderful review and beautiful modification for very warm colour illumination! I've checked your picture and really impressed by warm LED colour on Nutube. As pointed out, Nutube's illumination has some "cold" green colour but additional warm colour can greatly delight its existence. Wonderful and thank you so much!!

Mukunda | Oct. 28, 2017

Joost | Oct. 23, 2017

Neat little board without glutter.

For ESP32-PICO_double_decker MK2

Neat little ESP32 board without unnescesary addons. Only addons that I always need, like battery support.

Response from microwavemont | Oct. 23, 2017

Thank you for writing review!! I am very happy to provide you what you need!! Thank you!

Florin | Oct. 17, 2017

Amazingly fast shipping, double protected

For ESP32 Audio developing board (ESP32-ADB)

I received the package today after only 8 days. You should know that this never happens with Romanian postal service.
I was happy to find the board in a sealed water-tight anti-static bag, next to the color-printed instructions and a nice origami star, all put in 2 airbubble-padded envelopes, one inside the other.
I am out of nice words to describe how happy I am with this seller, the product and overall experience.

Thank you!
Florin

Response from microwavemont | Oct. 17, 2017

I am so happy to see your satisfaction!! Indeed shipping time takes sometimes close to one month but in the best case it just take around one week, so the best case came to you, great! Please enjoy wonderful ESP32 world with sophisticated high resolution TI's DAC PCM5102A. Thank you!!

Johan | Oct. 8, 2017

Epic

For ESP32-PICO Motherboard

Very good mkdir -p ~/Documents/Arduino/hardware/espressif && \
cd ~/Documents/Arduino/hardware/espressif && \
git clone https://github.com/espressif/arduino-esp32.git esp32 && \
cd esp32/tools/ && \
python get.py. Hagevetticked but will soon E4-pico-board

Response from microwavemont | Oct. 17, 2017

Thank you for showing Arduino environment setting! I am very happy to see your satisfaction!

Jackie | Sept. 11, 2017

how to get started with esp32-adb

For ESP32 Audio developing board (ESP32-ADB)

Hi I just bought the esp32-adb board (REV.2) couple of days ago. AFAIK, there is no need of a lipo charger. But I could not sketch a simple app like "hello world" to the board. The following error has occurred:

"A fatal error occurred: Failed to connect to ESP32: Timed out waiting for packet header"

Do you have any idea how can I fix it?

By the way, it was really fast shipping. Thanks for great product.

PS: I made it working by changing usb cable. Thanks a lot for your help.

Jackie

Response from microwavemont | Sept. 14, 2017

Sorry for overlooking your review.
Can I ask you to give me more details about your problem (which environment, ESP-IDF or Arduino IDE) and also what kind of program, "hello world"? All of ESP32-ADB are tested before shipping and correctly writing Bluetooth speaker mode example so I would ask you try
(1) change USB connector of your computer
(2) change USB cable (sometimes works)
and also switch off-on before uploading your new binary. The test firmware (bluetooth) might avoid your new binary uploading (in rare case it happens).
Here in the review column we cannot make conversation so please let me know the result in Tindie's messaging system ( you can send me in tindie's system). Thank you

Ken | Sept. 5, 2017

Nice low-cost started board with all you need to get going.

For VHDL training board by FPGA!

I am quite happy with this little FPGA starter board. The built-in JTAG worked perfectly with the free Lattice Diamond IDE (the board was auto-detected). The buttons, LEDs, 2 digit seven segment display, piezo sounder and 12Mhz clock give you something to play with right away. The possibility for easy I2C and SPI is nice too. The MachXO2 has enough LUT space and embedded RAM to implement some interesting designs (here is a version of Ben Eater's breadboard CPU that I implemented in VHDL to help get you started https://github.com/XarkLabs/BenEaterVHDL). Nice job!

Response from microwavemont | Sept. 6, 2017

I am also so happy to read your wonderful exploring FPGA board and enjoying CPU implementation!!! Your achievement is indeed beyond my expectation and thank you so much for sharing your VHDL code. I would like to try your CPU, thank you!!!

Emmanuel | Aug. 24, 2017

Neat kit

For DSP radio version 3

I bought this with nostalgia in mind, soldering a FM radio kit was my first electronic project many years ago, only it wasn't SMT.
I was delighted to discover an origami in the package, not only because I'm a fan of Japanese culture and Arts, but also because thinking objects have geographical origins is another way to travel the world without moving, and this one is a good reminder :-)

I still have to get a reflow station (thinking about this one https://www.tindie.com/products/LafrasH/modern-electronics-reflowr/ ) to get it assembled though.

Response from microwavemont | Sept. 6, 2017

Thank you for wonderful review including origami!! (actually it is my wife's made!) Just for small amount SMT soldering, indeed, we can do it by a fine soldering iron and magnifier (in my case, due to aging eyes..). For example, in the case of 0603 resistor( and capacitor), putting small amount of solder in one PCB land and re-melting it to fix resistor and the other can be soldered by soldering iron. You may need soldering wick to remove too much solder. Anyway thank you for reviewing and please enjoy Radio!!

Jean-Pierre | Aug. 21, 2017

Good product

For ESP32 Audio developing board (ESP32-ADB)

I like it, but it is a bit less sensitive on wifi due to the implementation of the antenna.
Much less sensitive than other esp8266. No other experience with an esp32.

Response from microwavemont | Aug. 21, 2017

Hello and thank you for review. The PIFA antenna part of ESP32 should be ideally "hanged from main PCB" but I did not take this configuration for better stiffness of the unit. But thank you for suggestion and I may reflect it on the next items!

Rasmus | July 22, 2017

The programmable logic counterpart to an 8-bit AVR dev board

For VHDL training board

I was looking for something analogous to 8-bit AVR microcontrollers, but for programmable logic. This CPLD board feels just right for me to get started.

I managed to follow the "How to" instructions and complete them in about an hour or two (not including Xilinx tools download and installation). Only minor detour was that the complete "how to" instructions was for the revision 1 (with a different CPLD) and the revision 2 instructions only tells what's different from revision 2. Of course I forgot to take the differences into account later when I followed the instructions... :-)

Over all, I'm pleased that I got from code to button+LEDs working in "real life" this easily and quickly. There aren't a lot of steps needed, and the "how to" covers the whole process, including installing the tools (and workarounds for Windows 10!). It did not assume any prior knowledge or installed tools, which was very helpful to me.

Next I will try to program the CPLD with code generated from MyHDL. It lets you develop and unit test the logic in Python and then extract Verilog or VHDL code from that. After that, maybe I'll try a faster crystal and experiment with, say, one of those cheap ultrasonic sensors. 8 Hz is very slow, but I realize that it is a quite good starting point. I did not have to implement a counter in code just to bring down state changes to human reaction times.

Also, the shipping was incredibly fast (less than a week from Japan to Sweden, and that included a week end).

Response from microwavemont | July 22, 2017

Thank you so much for nice review comment!! We need to take additional step (windows command line writing) which will not be required for expensive and established CPLD/FPGA board but I am also happy to read you have successfully written your own code on it. The on-board crystal is 32.768kHz and divided 4096 is just 8Hz and if some higher frequency is needed, please swap crystal to higher one (for example 8MHz or 16MHz) or taking another tap from 4040 12-bit counter chip. Thank you so much again!!

Brian | July 21, 2017

Wow

For Nutube amp kit, a vacuum tube in new century REV2

The kit is easy to assemble. Board quality is good and had no issues with solder pads or anything. The slowest part was carefully inserting all of the Nutube pins - takes a little patience. Fired up the unit and adjusted the left and right balance to center the sound.

I was blown away at how amazing the sound was! I typically use a decent usb DAC and this device was a totally different experience. I'm not an audiophile, but I can really appreciate this quality.

Response from microwavemont | July 21, 2017

Thank you so much for wonderful review on Nutube headphone amplifier. As you noticed, indeed, the sound from Nutube is clearly different from the one from solid-state semiconductor amplifier. Nutube is a kind of new invention, currently exclusively available from KORG/Noritake. Please enjoy wonderful sound. Thank you!

Per-Olov | July 20, 2017

Excellent for prototyping!

For ESP32 Audio developing board (ESP32-ADB)

I needed a board that had an ESP32 and a DAC of any sort on it, this did it all, including a display and the possibility to run off a battery (with charging circuit and all)

It did take a few minutes to understand why it didn't start or program the first time, but that was because i totally missed the fact that there was a power switch on the board :)

Response from microwavemont | July 21, 2017

Thank you so much for reviewing and I am very happy to see your satisfaction. The main switch is added for Lipo battery operation and I may need to change the circuit in the case of USB-bus power, main switch can be by-passed (in the case of bus power operation, the board can be always on.) Anyway Thank you so much!

Michael | July 19, 2017

If you want a new age tube amp, this is the one for you.

For Nutube amp kit, a vacuum tube in new century REV2

Any audiophile will tell you that the best sound comes from audio piped through a vacuum tube. Something about the audio signal going through a vacuum triode slightly distorts the signal and gives it that legendary classic "warm" sound. The classic sound many recognize from old school vinyl records. The sound from old school AM radios. Many yearn for that sound. Alas in this day and age most audio amp systems use plain old transistors that simply amplify the signal straight up. No "warm" sound to be found.

Now for all the good the legendary vacuum triode has accomplished there are a few caveats. First off, they are typically rather huge. Second, many require very high voltages on the main supply to work correctly. Lastly, good luck finding affordable vacuum tubes that are designed properly.

So what's a person to do? Well, remember the old school vacuum displays on many devices from the 70s through early 80s? Those are VFD, Vacuum Fluorescent Display, devices. Those things are basically using the same glowing effect classic triodes use to make the symbols. VFD is basically a smaller and more advanced triode. Low power usage and much smaller.

A company figured out how to take this VFD tech and use it as a dedicated triode. Thus we now have the Nutube made by Korg. Old schoold triode in a new school VFD form. Low power usage and classic "warm" audio sound. You even get the classic vacuum tube glow from these things.

That is what this audio amp uses. New age VFD triode amp. Gives that legendary warm distortion effect naturally. If you want a decent amp that gives the warm vacuum sound but want a small and low power package system get this thing.

Assembly required. Get your soldering iron warmed up.

Response from microwavemont | July 21, 2017

I wish to express my deep gratitude for your great and detailed review on Nutube headphone amp. Indeed the review is better than my item introduction. Nutube is really a kind of new technology on vacuum tube. I've noticed some hardware hacker tried to make amplifier by pure VFD display (digit display) but this time KORG/Noritake specifically produced VFD for audio amplification. I hope you will enjoy wonderful sound produced by wonderful Nutube "tube". Thank you so much!

Hassan | July 15, 2017

Fast shipping, A+

For ESP32 ADB type_R

Product arrived quickly (2 weeks) from Japan. As described. The seller communicated and responded to messages very quickly. Would but again.
Thanks

Response from microwavemont | July 21, 2017

Thank you for nice reviewing. Indeed delivery time heavily depends on custom inspection and this time happily it did not take long time. I hope you will enjoy the item. Thank you!!

Polina | July 14, 2017

Nice developing board

For ESP32 Audio developing board (ESP32-ADB)

Thank you Toshiro,

Great product! Software on GitHub works without problems, nice documentation, fast shipping.

Perfect quality. Recommended

Response from microwavemont | July 21, 2017

I am very happy to see your satisfaction. YES, indeed I believe ESP32 + PCM5102A, a very high quality audio DAC is a kind of "best partner"! Please enjoy wonderful combination. Thank you so much!

Mark | July 3, 2017

Nice product, but ..

For ESP32 Monster board, Ether, CAN, OLED all in one

The ESP32 Monster board is pretty nice and has a lot of features, but.... First, the device requires a 3.7V battery to operate. I can't use one of the millions of 5V micro USB power supplies that I have. So, the entry to using the device is having to buy a 3.7V batter and charger. Just searching Amazon for a 3.7v power supply doesn't yield much in the way of these types of power supplies with the required connector. The product really needs either to be powered by a 5V micro-USB connector or barrel connector. I don't like the layout of the PCB with the ESP32 on the bottom of the board. Increase the PCB to place the ESP32 on the top with the other components. Third, there are no mounting holes to place stand-offs or stack it with other devices. Not having any mounting holes and the ESP32 on the board means resting the board/ESP32 against the surface which isn't ideal.

Response from microwavemont | July 5, 2017

Thank you for review!
YES, right. Indeed ESP32 Monster board rapidly evolved from tiny prototyping board (original is ESP32 dev board with OLED, which has just OLED and Lipo circuit, that's all) to the current full featured state. During this evolution, the mounting hole was not, actually, taken into consideration, but as pointed out, for stable and continuous usage, supporting stand is indispensable. Also the power issue (works with Lipo) and ESP32 module arrangement are due to its original design. My very recent series (mainly audio DAC related items) gained the solution (enable/disable Lipo circuit, which enables to use board just by USB bus power) and I need to include this improvement also for ESP32 Monster board.

But I am very happy to see your satisfaction of basic concept of ESP32 Monster board, except for ESP32 module arrangement flavor and mounting hole, and power supply preference.

Thank you for very precious comment!

Benjamin | June 20, 2017

Perfect

For ESP32 Audio developing board (ESP32-ADB)

Fast shipping, well packed, included documentation, well product, with origami.

ESP-IDF Software on Github works out-of-the-box.

In short: Perfect japanese quality

Small thing to improve: make a ground plane. This would propably improve the noise level.

Response from microwavemont | June 21, 2017

I am really happy to read your satisfaction to ESP32-ADB! YES! As pointed out, by the sake of Espressif's esp-idf and TI's PCM5102A and powerful ESP32 module, ESP32-ADB works very well!! Thank you so much for review!

Andrew | June 19, 2017

Great developer and product !

For ESP32 Audio developing board (ESP32-ADB)

Great little ESP32 audio development board and it works. Toshiro responded to my questions immediately and is highly recommended. The ESP32 and PCM5102A are awesome chips.

Response from microwavemont | June 19, 2017

I am very happy to read your satisfaction to ESP32-ADB!! Indeed ESP32 is enough powerful by dual-core processor and TI's PCM5102A is famous Burr Brown originated sophisticated high resolution audio DAC!! Thank you!!

Oleg | June 14, 2017

Nice device and excellent seller!

For ESP32 Audio developing board (ESP32-ADB)

Thank you, Toshiro, for this board.
First of all, I bought this item for streaming music from iPhone6 in the car, where I have AUX input only.
ESP32-ADB it's really small plate, less than expected and you can put it everywhere. Very quick start of working, simple connection via bluetooth.

1. Sound: comparing with iphone 6 approximately the same quality, not better/not worse.
2. Delivery: from Tokio to Moscow just 7 days. Wow!)
3. Package: Very well packed, you may not worry about safety. User manual is included.
4. Seller: Recommended! Quick response and nice to talk.

Response from microwavemont | June 14, 2017

I am very happy to read great satisfaction and quick delivery to Moscow. Indeed shipment to Russia generally takes two to three weeks and sometimes more than one month but this time just seven days is really "lucky" case!! Also I am very happy to read "good and practical utilization" of ESP32-ADB in car!! TI's PCM5102A has high resolution and provides very good sound and really car usage is good application. Thank you so much!!

Fu | June 1, 2017

Real Vacuum tube sound ,compact size and no heat .

For Nutube based 15Wx2 amplifier KIT with Class-D amp

Choice for Bedroom Hi-Fi
Perfect match with 3"Full Range Speaker and
Nice for fast bass music and vocal music.

"Hum Noise" can solve by wire-out AC/DC adaptor

Response from microwavemont | June 1, 2017

I am very happy to read your satisfaction! Nutube is really sensitive to external noise (indeed both electrical and mechanical) but as pointed out, wipe out AC/DC will be one good way to solve it. Thank you so much!

Brent | June 1, 2017

Performs exactly as advertised

For Piezoelectric micro AIR blower

Not the strongest blower in the world, but it works exactly as advertised. Easy to set up, and operate. If this ran off a 5V USB it may be more accessible.

Response from microwavemont | June 1, 2017

Thank you for review! 5V operation is really good suggestion. Indeed 5V operation is possible by voltage booster adjustment. Just replace R8 with 70kOhms will reduce boost up voltage and will work for 5V power supply. But I may add 5V option for the item! Thank you for good suggestion!!