***SONICA 1 - Headphone Amplifier with TPA6120***
Sonica 1 is a rebirth of an older design of mine. A few years back I designed a small PCB for a headphone amplifier, based on BurrBrown (TI)TPA6120A2 chip amplifier. I made a power supply on a piece of test PCB with a toroidal transformer. The end result was quite pleasing and I have used it since then as my main source for music at home, whenever...
ATtiny controlled and LiPo battery powered MP3-Player using the DFPlayerMini-module featuring:
- Micro-SD-card slot,
- battery charging and protection circuit,
- battery level detection,
- OLED display,
- on/off switch,
- volume control,
- 3 push buttons to control the player.
You can directly connect a 3.7V LiPo battery and a 3W/4Ohm speaker to the board.
The firmware is written for the folder-p...
work in progress and by no means "production ready"
proceed with caution until it is production ready.
arduino controlled VCO VCF and VCA.
Uses Digital Potentiometers controlled by an MCU through
an I2C Expander.
Please see readme.txt in attachments.
ATtiny85 controlled FM radio with RDS (RDA5807) and integrated audio amplifier (XPT8871). You can directly connect a protected li-ion battery, a 3 W / 4 Ohm speaker and an FM antenna.
Modern earphones are not just (stereo) speakers, but they integrate a microphone and few buttons. All these components are available through a 4-pins 3.5mm plug (also known as TRRS). This schematic shows you how the microphone and buttons are connected through this connector. The common purpose of these buttons is music control, but in general, their behavior depends on the specific application. F...
This is a Raspberry Pi Zero W hat/shield with USB MIDI input, stereo audio output, 3 user-configurable buttons and OLED display.
To use as an audio card, enable PWM audio output by adding `dtoverlay=pwm-2chan,pin=18,func=2,pin2=13,func2=4` at the end of *config.txt* file.
Remeber that HDMI audio output is the default; use `raspi-config` to force output to 3.5mm audio jack.
If you can't find 47uF...
Combines Bluetooth 3.0 Audio Module with Class-D Amplifier and 4.2V Li-ion Battery Charger for wearable/portable audio projects.
Dimensions specifically designed for Dual 18650 Pack for use in bluetooth stereo headphones or portable speakers.
In theory, you should be able to customize it by directly plugging it into a PC with a USB data cable and customizing it with Silicon Labs iWrap software. I...
I want present to you my new version of the Bluetooth module for a car, home whatever you want.
This module base on the BK8000L module with an additional power scheme for working with car voltage. But it’s also can work by USB.
You can ask me why need to create something new if you can easily buy already exists solution from China?
Here are some pluses:
1. It works.
2. Noise reduction fr...