Shop OBEX P1 Docs P2 Docs Learn Events
Tda 7052 — Parallax Forums

Tda 7052

fbeekfbeek Posts: 14
edited 2010-06-01 14:45 in Propeller 1
Hello everybody,

i am new in the world of the Propeller chip and need some help from the experts here in the forum.

My proto board is working without any problems (RS232, Pal Video etc.) and now i want to hear some audio from it, so i want to connect a TDA7052 to my Propeller.

My problem is now that i have never used this ic before so i doesn't know how to connect it to the Propeller.

The power connection are clear but i have my problems with the signal.

Can someone please help me?

Regards and thank you

Florian

Comments

  • LeonLeon Posts: 7,620
    edited 2010-05-31 14:38
    Just connect it to the output via a suitable capacitor, 100 nF should do.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Leon Heller
    Amateur radio callsign: G1HSM
  • fbeekfbeek Posts: 14
    edited 2010-05-31 14:40
    Ok thank you.I will try it.
  • LeonLeon Posts: 7,620
    edited 2010-05-31 15:22
    If it's a logic output you might need to attenuate the signal, of course.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Leon Heller
    Amateur radio callsign: G1HSM
  • Toby SeckshundToby Seckshund Posts: 2,027
    edited 2010-05-31 21:00
    Be careful which version you have. The "A" version just works, but the "B" one has an extra electronic attenuator built in, I beleive that you have to hold down pin4 with a resistor to get anything out.

    http://pdf1.alldatasheet.com/datasheet-pdf/view/19419/PHILIPS/TDA7052B.html

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Why did I think a new, more challenging, job was a good idea ??
  • fbeekfbeek Posts: 14
    edited 2010-06-01 07:04
    Thank you for your replys.

    I have checked the version and it is a "A" Chip.

    My problem is that i doesn't know which RC combination i need to attenuate the signal.

    Btw: sorry for my bad english.
  • LeonLeon Posts: 7,620
    edited 2010-06-01 07:44
    Just use a couple of resistors.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Leon Heller
    Amateur radio callsign: G1HSM
  • fbeekfbeek Posts: 14
    edited 2010-06-01 07:47
    Ok, thank you for your help.
  • AribaAriba Posts: 2,690
    edited 2010-06-01 13:53
    To be a wee bit more specific than Leon, here a circuit diagram.

    This is not tested, only put together according the datasheet. Perhaps you need to play a bit with the
    resistor values to get the right voltage swing (volume). Or you insert a 10 kOhm Poti instead the 3.3k resistor.

    Andy
    TDA7052.gif
    400 x 159 - 2K
  • fbeekfbeek Posts: 14
    edited 2010-06-01 14:00
    THX this works fine for me.
  • LeonLeon Posts: 7,620
    edited 2010-06-01 14:45
    You need decoupling on the supply pin.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Leon Heller
    Amateur radio callsign: G1HSM
Sign In or Register to comment.