What is it?

Tiny audio level meter with 128x32 pixels OLED graphical display enabling audio level monitor and waveform monitor. The circuit consists of Atmega 328P and Lipo charging circuit. The firmware is programmed by Arduino IDE and its source is uploaded to my github account. The file also includes sample 3D printable enclosure. (3D printed enclosure is NOT included in the sales product)

Why did you make it?

It is fun to see audio level !! Especially time domain waveform is really interesting to see.

What makes it special?

• Arduino Pro (328p/8MHz/3.3V) compatible. Easy to modify firmware by yourself

• LiPo charging circuit embedded. Just connect your LiPo battery enables portable operation as you wish

• Tiny 128x32 pixels graphical display (SSD1306) is easy to re-program

CAUTION

• LiPo battery is NOT included. Please prepare 3.7 V single cell LiPo battery for operation

• The required LiPo battery is NOT portable USB portable battery, ( generally consists of LiPo + charging circuit with 3.3V to 5V conversion). Please prepare 3.7 V single cell LiPo (any mAh are ok, simply leads to how long the operation time..)

• Order from Canada is accepted only for the case you will accept HIGH package loss risk in Canada Post. For shipment to Canada, even for package loss, I will NOT send the replacement for it. I will use international registered parcel but Canada Post does not take any responsibility for delivery. I will surely take responsibility till the package departs from Japan but after entering Canada, I cannot take responsibility for delivery.