Fire Power Booster - schematic inside

[Alinne Vlad]

Hi folks, my first post here. I' from Brazil and yes, I'm girl that loves electronic studies, stompboxes, etc.
So, we have here in Brazil some cool pedals,. Why not share with you guys??

The actual Fire Power Booster is a nice clean active Bass e Treble booster. Flat response with Bass e Treble at center and Booster at minimun adjust.
There's a switch to a Dirty mode - an overdrive for sure or a clean booster.

[Kipper4]

wow Cool
How effective is the tone stack?
Thanks for sharing and welcome aboard Alinne

[Alinne Vlad]

wow Cool
How effective is the tone stack?
Thanks for sharing and welcome aboard Alinne

Thank you Kipper

This guy is boring as hell ( the video guy not you Kipper  ).,,jeeezzz
Sorry for that guys, but you can hear the pedal in action
tip: jump ALL the yada yada yada boring talk. about 6:00 minutes

http://youtu.be/xHRjQZFpwbQ?t=6m

[psychedelicfish]

Cool! Unless you plan to share your PCB layout, I might knock together a PCB for it.
What do you reckon guys? Is it 1590Able?

[meffcio]

Cool! Unless you plan to share your PCB layout, I might knock together a PCB for it.
What do you reckon guys? Is it 1590Able?

Think different. Everything is 1590Able
This one probably even without use of smd components.

[samhay]

Thanks for sharing Alinne - DC coupled stages and a Guvnor style gain setup are both tricks I am quite fond of.

psychedelicfish - A quad op-amp is not an especially tight fit in a 1590A, but there is quite a lot happening in the gain stages of 2 of the op-amps, which might give you a bit of a headache. Good luck.

[electrosonic]

Usually the  pots in that Baxandall tone stack are linear. The log pots will skew the response in the mid setting (as opposed to the normal flat response when the pots are set at their mid points)

Andrew.

[Alinne Vlad]

PCB





http://www.sendspace.com/file/cl3kpc

[slacker]

Looks great, thanks for sharing. On the schematic are the switches in the boost position? So Dirty adds the diodes and connects C4 to REF.

[electrosonic]

Looks like when the diodes are added, the low end is cut a little - a little less muddy for the distortion settings I guess.

Andrew.

[Govmnt_Lacky]

That 470uF electro might make it un-1590A-able 

[Hemmel]

Are there some jumpers missing or something ?
I'm guessing the 14 empty connectors mean there are 7 jumpers ?

[Alinne Vlad]

Are there some jumpers missing or something ?
I'm guessing the 14 empty connectors mean there are 7 jumpers ?

Fixed. Sorry guys.

[midwayfair]

Thanks for sharing. I like the way the dirty mode switch was done.

[earthtonesaudio]

Pulldowns on the mode switch, what luxury!

That 470uF electro might make it un-1590A-able 

Should be safe to use a smaller value, especially if your power supply is decent.

[Alinne Vlad]

Pulldowns on the mode switch, what luxury!

That 470uF electro might make it un-1590A-able 

Should be safe to use a smaller value, especially if your power supply is decent.

Nope, no pulldown resistors, they are  just for set a lower  gain  for each pair ( R4/C3 ) for dirty setting and ( R7/C4 ) for clean setting.
R4/C3 are "ignored" at Dirty mode and R7/C4 are "ignored" at Clean mode.

[electrosonic]

At first glance, you could remove R5 and R6 and replace them with a single 1 M resistor from C3 to C4 (across terminals 1 and 3 of the switch). It would functionally be the same, but save a resistor.

Andrew.

[psychedelicfish]

At first glance, you could remove R5 and R6 and replace them with a single 1 M resistor from C3 to C4 (across terminals 1 and 3 of the switch). It would functionally be the same, but save a resistor.

Andrew.

That makes sense, I'll do that in my layout. My layout is probably going to be SMD, because I'm using circuits.io and didn't notice that the default footprint for passives was SMD, and I've done too much now to be bothered changing it all.