I received one of the first-run kits about a month ago, but wasn't able to assemble it until now. Everything was well packaged and had both board layout and schematic documentation included. I needed to reference the hackaday.io project page and ask a couple questions regarding some part value differences I thought I found, but overall I had little trouble with assembly. Initially with the trimpots set at 50%, I heard some startup and operating noise, particularly with no audio input. Once I set the grid voltages correctly (mine are at about 2.25v) no distortion and little noise remain (only about <1s of startup noise). I'm using a 6xAA (1.5v) pack for power, and has a current draw between 45.5mA to 46.1mA when using my Grado SR80 headphones. I'm planning on installing this in a transparent enclosure for desktop use so I can see the VFD illumination while operating. It isn't bright enough to light a room or wall with, but is enough that it can be seen in indirect sunlight conditions. I wouldn't recommend using the amp on the go without sufficient vibration dampening, since vibration seems to be easily picked up by the VFD and can be heard in the output. Overall I'm very pleased with the kit, and would recommend it to anyone interested in trying or learning about tube-based amps.
Hello and thank you for precise comment. I've confirmed your question at relevant hackaday project and answered it there. I would like to repeat the answer as, for Ultima programming at Arduino IDE, we need Atmega1284P support by "board manager" on IDE. Exact procedure to add Atmega1284P is described at https://hackaday.io/project/13088-minimal-and-self-contained-atmega1284p-mod-chip .
The most attractive thing on this radio is the LCD. I listen to FM most of the time and reception is very clear and volume controls are great. Its very unique approach with the microcontroller. Whole code is available on the website. Japan is well known for making things smaller and he kept that tradition. Will buy more. Thanks
Thank you for nice product review. I am very happy to see your satisfaction for DSP radio. For shortwave reception, we need some antenna (just several metres wire is enough) but you may also enjoy exotic radio station on Caribbean seas. Thank you again!!
I must say this is the best product, I ever came across. It will take you back in the beautiful 80's world. I can't thank enough. The best part is you can keep it with you and all you need is pocket TV to indulge. And don't forget it is Made in Japan. Thank you
Thank you so much for wonderful review message. Indeed I am very glad to receive such a message. I have been trying to spread the joy of "gadget" all over the world and I am very happy to hear your satisfaction! Thank you again!
Uses an Arduino ATmega1284P with an onboard full color OLED, micro SD card reader, with integrated FTDI USB interface and all on a small form factor board. This board is easy to program and the seller provides access to a library and example source code to get the user started. His documentation includes a schematics which are always helpful. One of the best things about this seller is he is easy to contact and quick to respond with helpful information. He stands behind his customers as he proved by quickly sending me a replacement for a failed board. His projects are neat, well conceived, fun and priced very affordably!
I am very glad to see your review. Indeed I am not running commercial company but just want to spread the joy of making something all over the world. I am very happy if I can be some help of your making something interesting! Thank you so much!!
This is an awesome product. You will not believe until you hold this gadget in your hand. It is very easy to use and very well made. My kids love to play with it. I remember the old days when I used to write Basic programs. A must buy for a computer enthusiast like me. Thank you very much.
I am very glad to hear your satisfaction. Actually this computer has a far-extended TinyBasic and lots of "hidden" extended BASIC function is implemented. Most of operation introduced in https://www.youtube.com/user/microwavemont is implemented, and even without keyboard nor FTDI interface, text file named "AUTOEXEC.BAS" stored in SD card will be automatically executed just applying power supply. Moreover, it has print-out function and if TTL (19200bps) serial printer is available, we can enjoy paper print-out. Thank you so much for reviewing product! I guess your children will become "super-kids"!!
Miniature 2"x2" AM/FM/SW Receiver is fun kit that actually works! The kit it is not difficult to build. The Arduino, Radio ICs and miniature OLED display all come pre-installed. However, I don't suggest this kit for someone inexperienced with soldering SMD components as the resistors, capacitors and LEDs are size 603. That's very, very small and without care they can get lost on your desk or floor with a slip of the tweezers or a sneeze! But, there are only about 20 to solder along with the volume and tuning controls, antenna, on/off switch, battery and stereo headphone jack(yes it's stereo!). An experienced builder can construct this radio in less than an hour since it uses so few parts. The buyer will be required to provide a re-chargable 3.7 battery, which by the way, can be charged with radio's built-in charger by just plugging it into a USB jack. An LED will tell you it's charging and when complete.
The OLED display is very small but very readable and large enough to display the mode, frequency, stereo(FM only) and signal strength. It's easy to tune just rotating the tuning control and adjusting the volume control with plenty of power for headphones or a powered speaker. The FM is great but the AM and SW will require a decent antenna.