TDA7439 + NodeMCU + Aptx module audio board
OLD version, noisy.
New version with ground separation: (https://easyeda.com/fxndstrs/tda7439)
**Circuit power audio amplifier IC TPA3116D2 D Class.**
The TPA3116D2 series are stereo efficient, digital amplifier power stage for driving speakers up to 100 W / 2 Ω in mono. The high efficiency of the TPA3130D2 allows it to do 2 × 15 W without external heat sink on a single layer PCB. The TPA3118D2 can even run 2 × 30 W / 8 Ω without heat sink on a dual layer PCB. If even higher power is needed...
<span class="colour" style="color: rgb(51, 51, 51);">Усилитель мощности звуковой частоты класса D построенный на базе микросхемы IRS2092. Выходная мощность около 250-300 ватт на нагрузка 4 Ома, рекомендованная рабочая частота 350-400 кГц, присутствует защита от короткого замыкания в нагрузке. Схема рассчитана на работу с полевыми транзисторами IRFB5615, при использовании других транзисторов необхо...
***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...
EasyEDA project for easy and quick build LNA module. Project include schematic for LNA module and PCB's with differences in the power circuit and Bias Tee implementation (PCB with/without reverse polarity protection circuit, PCB with/without TCBT-14+ Bias Tee module). Version for mounting SMD components.
## Current development progress:
This is a 12V Tube Amplifier with a built in USB DAC.
The amplifier part is based on Rogers Gomez's [NP-100v12](https://diyaudioprojects.com/Solid/12AU7-IRF510-LM317-Headamp/) design.
The USB DAC is inspired by Jan-Erik Skata's [JEDAC](http://users.abo.fi/jskata/JEDAC/) design.
This is a Work-In-Progress, untested and provided as-is until further notice.
Holes might be in the wrong p...
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...