2nd Chance PI

[baum7154]

[QUOTE=Wahyu;222616]Hello dantech

i see schematic NE5534 have LC DC filter, capacitor before inductor for DC filter?

capacitor->inductor , or inductor -> capacitor

_______________________________________________

What schematic is this from? Looks like it is adapted from original Chance. Also Chance uses an OP37 op amp that is superior to the NE5534.

Dan

[Wahyu]

schematic

http://chomikuj.pl/dantech/2nd+Chanc...5.zip(archive)

[baum7154]

Thanks Wahyu,

I see that the original 10 ohm resistors were replaced with 4.7uh chokes. Not sure that it makes any difference as the opamp current draw is so small and there are two sets of filter caps on the +UP/V+ and on the -UP/V-.

Dan

[dantech]

Aaaaaaa! I see. Right, the pin 2 is input and pin 3 should be ground. Inductors are placed incorrectly also. Fact, there were a few bugs in this place

The Kicad archive is corrected now. Thanks for warning.

[dantech]

Special v003c version for ATmega8 only is released.
Because lack of free time that version was not tested at all.
In theory it should works.

v003c has a few modifiacations (not all of course) from higher versions for ATmega328

[dantech]

v014 is released

[dantech]

v015 released

[Spyke]

@dantech: thanks for sharing

Did someone test it with unmodified pcb chance1?

[dantech]

Have to work well with unmodified 1st ChancePI

[dantech]

v016. Small bug in the "Volume ascending" submenu repaired

[ripsdevala]

Dantech, do you have the part list to build?

[dantech]

No, but you can use kicad archive from my repository and then you should find bill of materials in the Kicad

[ripsdevala]

No, but you can use kicad archive from my repository and then you should find bill of materials in the Kicad

Many thanks dantech

[ripsdevala]

Correct me if im wrong


All red marking doesn't exist in the scheme and kicad, i assume that is not used anymore.

[dantech]

exacltly.

Entire Q9/D6 circuit and its control is not used more