***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...
**This is an experimental electronic circuit, without any warranty.**
Class-A Mosfet Headphone Amplifier
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...
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...
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.
**Experimental low cost versatile snake**
The initial requirement was for a 4 channel audio extention lead (PA snake) for use in domestic room with 4 active loudspeakers (left, center, right and sub) at the opposite end of the room to the control amplifier (and rear speakers).
Additional requirements to be added later were:
1. Balanced audio may be needed in electrically noisy environments.
Amplifier stereo 80 watt (2x40) dengan power supply 12 volt. dengan speaker 4 ohm.
- pin 1 dan 13 dari TDA8560Q adaah input sinyal audio. kapasitor 474 bertugas melindungi input dari arus DC yang masuk.
- pin 3 dan 10 adalah supply tegangan. jika tegangan lebih dari 18 volt maka sirkuit tidak ON.
- pin 11...