525 build thread

[duantro]

duantro,
Maybe daft, but is the chip fitted on the underside?

Chip is on the underside.

And maybe the LEDs are in backwards, try flipping one and see if it goes on.

And I have tried flipping one LED around after reading here about someone else doing this.

Still no go. I have a tech pal that helped calibrate these say that the LED's light up when you run more juice than the comp is capable of. He also double checked that I had the correct resisters inline for the meters. To quote Will Ferrell, "this is Mind bottling"

 

[dmp]

I have a tech pal that helped calibrate these say that the LED's light up when you run more juice than the comp is capable of.

You have something wrong because this shouldn't be true. The only thing you can do is double check the components again and run more tests. Finding these kind of problems can be difficult. If I had this problem, I would insert a signal from a signal generator right at pin 5 of the lm3916 chip and determine that the metering is working (0 dbv lights the correct LEDs). Then you would know if the metering has a problem, or the sidechain feeding it. Perhaps CR6 is backwards or your trimmer is defective.

 

[duantro]

Thanks for the suggestions. I think I have CR6 in correctly. Here's a quick pic. Let me know if you see anything that I'm missing. I'll run some signal and see how much juice it needs to light em up. Sorry for the crappy picture

Edit: With a tone generator on input (pin 5), There are no LED's lighting. however with the tone generator connected to the LED's (pin 1, & pins 10-18) the individual LED's light up just fine.

 

[thestudio]

I'm trying finish all my many projects this year and found another one which is the 525....  I would like know if there's a BOM available for this project??? Also, I have an older version because it looks like there was a pcb update?

 

[dmp]

With a tone generator on input (pin 5), There are no LED's lighting. however with the tone generator connected to the LED's (pin 1, & pins 10-18) the individual LED's light up just fine

The LM3916 chip works as a current sink on the LEDs, meaning that if you put positive voltage on the pins to the chips, and the LEDs light up, they are in backwards. If this isn't the problem, you probably need a new chip.

 

[duantro]

I've finally figured it out. I had a 330k resister in r53 instead of a 300ohm. Thanks for the help ive got meters now.

 

[emrr]

Have been trying to finish off one of these that someone else started.  Note to self:  NEVER buy anyone else's unfinished project.  Far more difficult, since you don't know what they did and didn't do correctly. 

Anyway.  Anyone have problems with the ceiling switch (sw5, more/less)?  This one wants to throw speaker cones across the room when changed, and also includes a lovely high pitched squeal.  Switch seems to have a good deal of rotational flex, and it's well tightened.  All seems properly built, and I've retouched all the joints.    May have to throw it out and start over with a new switch.  What will fit in? 

---EDIT-----

maybe answering my own question, maybe not. 

It appears from all available evidence that sw5 was part of the kits, maybe it wasn't?  And the sorry bastard before me ordered BBM switches?  That's how it's acting.  But it sure looks like the switches seen in everyones pics. 

The only other clue I can see is that Peter's switch layout picture shows an aluminum standoff between the inner wafer and the front of the switch body.  This one only has the screws as support.  Possibly that is the source of the additional flex, and contact failure? 

 

[peter purpose]

1. What will fit in? 
2. This one only has the screws as support.  Possibly that is the source of the additional flex, and contact failure?

1. I've seen Grayhills used.... but you've got the thing there, take a stab at choice.
2. There should be steel sleeves and spacers, so soppy bollocks didn't do it right.

 

[emrr]

Yeah, got it in front of me, and definitely MBB.  Looks like I need to fit some spacers in and see how it plays. 

 

[jandoste]

Hey Peter,
I received my package and Thanks [ also big thanks for the score  :]
Just I'm searching the Bom parts  and that I need to buy one more Transformer...
Can I use this one from Hairball ? http://hairballaudio.com/shop/product_info.php?cPath=24&products_id=82

Thanks

 

[peter purpose]

Hey Peter,
I received my package and Thanks [ also big thanks for the score  :]
Just I'm searching the Bom parts  and that I need to buy one more Transformer...
Can I use this one from Hairball ? http://hairballaudio.com/shop/product_info.php?cPath=24&products_id=82

Thanks

No, you need the same thing. EA-2623-1 from Jeff. I thought you must have had one already.
And by the way.... a 'score' is what we English call £20.

 

[jandoste]

Hi Peter,
I can't find BC161-16 
Can I use this one --> 2N5322 instead of BC161-16 ?
http://fr.mouser.com/ProductDetail/Central-Semiconductor/2N5322-LEADFREE/?qs=sGAEpiMZZMutXGli8Ay4kKcj8LVUp7Qv6fiOhiO6W%252bA%3d
Thanks

 

[peter purpose]

I don't know if you can use them or not, but 2n3053 and 2n4037 are good for the driver Qs.

 

[jandoste]

I don't know if you can use them or not, but 2n3053 and 2n4037 are good for the driver Qs.

Thanks Peter,
is it right that;
BC141-16 => 2n3053 
BC161-16 => 2n4037
I guess my last question...

 

[peter purpose]

work it out yourself.

 

[zayance]

Hi Peter,
I can't find BC161-16 
Can I use this one --> 2N5322 instead of BC161-16 ?
http://fr.mouser.com/ProductDetail/Central-Semiconductor/2N5322-LEADFREE/?qs=sGAEpiMZZMutXGli8Ay4kKcj8LVUp7Qv6fiOhiO6W%252bA%3d
Thanks

http://fr.farnell.com/multicomp/bc161-16/transistor-pnp-boitier-to-39/dp/9207694?Ntt=BC161-16

http://fr.farnell.com/multicomp/bc141-16/transistor-npn-boitier-to-39/dp/9207678?crosssellid=9207678&crosssell=true&in_merch=true&

 

[jandoste]

Hi Peter,
I can't find BC161-16 
Can I use this one --> 2N5322 instead of BC161-16 ?
http://fr.mouser.com/ProductDetail/Central-Semiconductor/2N5322-LEADFREE/?qs=sGAEpiMZZMutXGli8Ay4kKcj8LVUp7Qv6fiOhiO6W%252bA%3d
Thanks

http://fr.farnell.com/multicomp/bc161-16/transistor-pnp-boitier-to-39/dp/9207694?Ntt=BC161-16

http://fr.farnell.com/multicomp/bc141-16/transistor-npn-boitier-to-39/dp/9207678?crosssellid=9207678&crosssell=true&in_merch=true&

Merci Zayance

 

[jandoste]

Hey Guys,
I just finishing my mouser list and on the Vu meter board I see CM1 what is that? Any idea?
Thanks :-*

 

[zayance]

Hey Guys,
I just finishing my mouser list and on the Vu meter board I see CM1 what is that? Any idea?
Thanks :-*

On the BOM:

CAPACITORS
(WHAT I USED)
CM1 1000UF/16V

 

[jandoste]

Thanks Zayance!

for VCR2N I received an email from Goldmine sales "We do not ship to France" 
Do you have any other idea?
Thanks