TinyDFPlayer is an 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
- Three push buttons to control the player
- Remembers the last track played after switching off (EEPROM)
You can directly connect a 3.7...
***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...
LED Music Spectrum generates the beautiful lighting pattern according to the intensity of music. It contains many RGB LEDs which not only turns on and off as per the music but also change color according to the music.
Here is a Music Spectrum using NeoPixel RGB LED Matrix and ARM microcontroller.
<iframe width="560" height="315" src="https://www.youtube.com/embed/K0kpb31bLfU" frameborder="0"...
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...
A compact USB powered audio player module with up 32GB capacity using removable Micro SD cards. Quickly update audio content using drag and drop interface, since the module acts like an external USB drive when connected to a computer. Available in two different models, photoresistor or button switch, to control audio play.
A CS42448 multi-channel audio codec breakout board for the Teensy 3.5/3.6
*note* This PCB does not provide any analog filtering or biasing for the input and output signals and must be done externally. Please refer to the CS42448 data sheet for more info.
This board breaks out the 6 input and 8 output differential audio signal pairs of the CS42448. The digital signaling (TDM) and control (I2C) a...
**This is an experimental electronic circuit, without any warranty.**
Single channel 2-way 24 dB/oct Linkwitz-Riley active crossover.
Crossover frequency: 2.9kHz
PCB dimensions: 60mm x 100mm
Equalizer characteristics - simulation
Amplificador com dois canais de 35W com o CI TDA7375 (ou TDA7377).
- Configurado para trabalhar no modo stéreo utilizando duas conexões internas em ponte;
- Recomenda-se alto falantes entre 4 e 8 ohms;
- Os resistores do LM317 devem ser calculados para ajustar a tensão em 12 volts;
- Para maiores tensões, verificar o datasheet do LM317 e do TDA7375;
- O potenciômetr...
This is a miniature 0.7W amplifier with adjustable bass boost, gain, and volume controls. Uses 1/8" (3.5mm) headphone jacks on the input and output. Powered by USB or 9v (4-12 VDC, max of 15 VDC). I designed it to use film capacitors and Nichicon audio grade electrolytic capacitors wherever possible in order to preserve the signal and reduce noise. An isolated power supply such as a battery is...