2nd Chance PI

[dantech]

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

[ripsdevala]

Dantech, do you have the part list to build?

[dantech]

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

[dantech]

Have to work well with unmodified 1st ChancePI

[Spyke]

@dantech: thanks for sharing

Did someone test it with unmodified pcb chance1?

[dantech]

v015 released

[dantech]

v014 is released

[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]

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.

[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

[Wahyu]

schematic

http://chomikuj.pl/dantech/2nd+ChancePI/Schematics/2nd+ChancePI+kicad,5608518745.zip(archive)

[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

[eclipse]

Pin3 of the preamp must be connected to GND and yeah that LC filter doesn't seems correctly connected.

[Wahyu]

Hello dantech

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

capacitor->inductor , or inductor -> capacitor

[dantech]

https://youtu.be/PDnZ3_BuyM0

Quick metal discrimination test