audioguru2
- Apr 6, 2004
- 12,026
- Joined
- Apr 6, 2004
- Messages
- 12,026
Hi Xtp,
Opamps don't supply much current. There are some tiny surface-mount power amp ICs for earphones that operate from a low voltage and use a voltage doubler circuit for their power supply. They are nearly impossible to solder.
You could use an MC34119 8-pin ordinary-size IC that has two power amps bridged for fairly high power at a supply voltage down to 2V. I think you will use it with 3V or more for your earphones to be loud enough. ;D
mc34119.pdf
Opamps don't supply much current. There are some tiny surface-mount power amp ICs for earphones that operate from a low voltage and use a voltage doubler circuit for their power supply. They are nearly impossible to solder.
You could use an MC34119 8-pin ordinary-size IC that has two power amps bridged for fairly high power at a supply voltage down to 2V. I think you will use it with 3V or more for your earphones to be loud enough. ;D
mc34119.pdf
