Hi, I know i2c debugger
Its just that Proteus dont allways work 100%
when you use Interrupt, so thats why I like to test on real hardware first
All I2C command looks good for Bas / Mid / Trible / volume / Gain / Input select
Encoder / button ok
Lcd Text is ok to
so Now I wait for TDA7439 so I can make a test setup
I have a test set up for tda;7439 and a si4703 break out board with it soldered on it. ,have programmer too
I need to change the output impedance to 150K
i have try it several times but don't know the value of the resistors
is the somebody how can help me out
and try to explane how did you do it
if I Logarithmic Attenuator Calculator of Jos
the resistor value goes up and down
Danzup goes start with 10K then up and down
fi
R30 = 10K
R31 = 82K
R32 = 2,5K
R33 = 47K
.....
thanks
i have try it several times but don't know the value of the resistors
is the somebody how can help me out
and try to explane how did you do it
if I Logarithmic Attenuator Calculator of Jos
the resistor value goes up and down
Danzup goes start with 10K then up and down
fi
R30 = 10K
R31 = 82K
R32 = 2,5K
R33 = 47K
.....
thanks
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TAD7439 test
Hi aditya ,
Your got a Private Messages: 🙂
Simple test TDA7439 3 buttons lcd
Pls tell me what lcd type you use 16*2 or 20*2
so I can make the bargrahp for lcd
Hi aditya ,
Your got a Private Messages: 🙂
Simple test TDA7439 3 buttons lcd
Pls tell me what lcd type you use 16*2 or 20*2
so I can make the bargrahp for lcd
Last edited:
i have a 16* 2 Lcd but will check and get back once i reach home at work right now... thank a ton i will do the tests. and get back
I m building a rc airboat right now. and today managed to get all the drawing done as per my specs from my sweet wife( she knows autocad ,, ).. and now just finished cutting 3mm balsa wood for frame,, did the winding of my brushless 6 amp motor hope it works like the original winding 😉
tomorrow i will be doing the pcb designing for tda7439 and my amp tda7265 on one board and probably mannage to ad the m8 with it such that only lcd wires and encoder wire go out of it... and probably avoid all the wiriry mess that was there in my pic that had mailed u.. of my pga2310 build
tomorrow i will be doing the pcb designing for tda7439 and my amp tda7265 on one board and probably mannage to ad the m8 with it such that only lcd wires and encoder wire go out of it... and probably avoid all the wiriry mess that was there in my pic that had mailed u.. of my pga2310 build
see older post from pages 57 >
http://www.diyaudio.com/forums/anal...trolers-source-selections-57.html#post2676839
Farmtech,
see that, but if i select 150 K and see the resistors don't know witch
value i must place on the board
see that, but if i select 150 K and see the resistors don't know witch
value i must place on the board
NOTE I did not test this 150K but You get a idea from this
Attenuator type: ? 150K constant input or output resistance
The Design Result picture order left to right
Left
30L 32L 34L 36L 38L 40L
31L 33L 35L 37L 39L 41L (LOAD_RES) - this Load_res is not on sch
Right
30R 32R 34R 36R 38R 40R
31R 33R 35R 37R 39R 41R (LOAD_RES) - this Load_res is not on sch
From sch in PDF post#4
http://www.diyaudio.com/forums/anal...controlers-source-selections.html#post1906710
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Farmtech
it bust be 150K output resistance
Design Result
in 5.6M 820k 220k 82k 39k 18k
30L 32L 34L 36L 38L 40L
GND 150k 180k 270k 390k 680k 1.5M Rload
31L 33L 35L 37L 39L 41L
Nominal attenuation: 32dB 16dB 8dB 4dB 2dB 1dB
Linearity errors: 0.04dB -0.22dB 0.48dB -0.18dB -0.21dB 0.1dB
is this correct?
it bust be 150K output resistance
Design Result
in 5.6M 820k 220k 82k 39k 18k
30L 32L 34L 36L 38L 40L
GND 150k 180k 270k 390k 680k 1.5M Rload
31L 33L 35L 37L 39L 41L
Nominal attenuation: 32dB 16dB 8dB 4dB 2dB 1dB
Linearity errors: 0.04dB -0.22dB 0.48dB -0.18dB -0.21dB 0.1dB
is this correct?
i tried to reprogram my mega8 but i have having fuse issue can you give the details of all the fuse will try again tommorrow. ref tda7439
Set Jtag disable and internal 8Mhz RC oscillator (Cksel = 0100 , Sut = 10)
Regards,
Tibi