Katana - pop when engaging boost switch

[cgmason1986]

I built a clone from aionFX Muramasa board, but I get a slight pop when I engage the boost. Does this need some kind of pull-down resistor somewhere? Here are the build docs with schematic:

https://aionfx.com/app/files/docs/muramasa_documentation.pdf

Thank you!

 

[Robert]

It might help to add 1M bleed resistors from A1 to ground and B1 to ground.

 

[cgmason1986]

It might help to add 1M bleed resistors from A1 to ground and B1 to ground.

Thank you - would this be the top row or bottom row or the switch? (Up position engages the additional boost)

 

[Feral Feline]

Lug numbering of DPDT:
1 4
2 5
3 6

UP position of toggle means Pole 1's lugs 2&3 are connected as is Pole 2's lugs 5&6.

The 1M resistors would go between 3&GND and 6&GND:

DPDT LUG#	SCHEMATIC #
1	A3 (NC)
2	A2
3 (add 1M to GND)	A1
4	B3 (NC)
5	B2
6 (add 1M to GND)	B1

 

[cgmason1986]

Lug numbering of DPDT:
1 4
2 5
3 6

UP position of toggle means Pole 1's lugs 2&3 are connected as is Pole 2's lugs 5&6.

The 1M resistors would go between 3&GND and 6&GND:

DPDT LUG#	SCHEMATIC #
1	A3 (NC)
2	A2
3 (add 1M to GND)	A1
4	B3 (NC)
5	B2
6 (add 1M to GND)	B1

Exactly what I was looking for - thanks!

 

[cgmason1986]

Lug numbering of DPDT:
1 4
2 5
3 6

UP position of toggle means Pole 1's lugs 2&3 are connected as is Pole 2's lugs 5&6.

The 1M resistors would go between 3&GND and 6&GND:

DPDT LUG#	SCHEMATIC #
1	A3 (NC)
2	A2
3 (add 1M to GND)	A1
4	B3 (NC)
5	B2
6 (add 1M to GND)	B1

Just an update - I added the resistors, and it's working perfectly. Thanks for your help!

 

[Feral Feline]

Tweren't me, twas PedalPCB's idearooniki...

 

[Robert]

Excellent! Love your implementation as well, nice and classy.

 

[cgmason1986]

Excellent! Love your implementation as well, nice and classy.

Thank you! Couldn't be happier with it, check out the front! Behold the "Kelly Kate Anna" (get it?)

 

[music6000]

Thank you! Couldn't be happier with it, check out the front! Behold the "Kelly Kate Anna" (get it?)

Cool Build, good play on words!

 

[Cucurbitam0schata]

+1 tasteful houseplant

 

[cgmason1986]

+1 tasteful houseplant

Thanks - it's fake, I kill all my real plants.

 

[Robert]

Thanks - it's fake, I kill all my real plants.

Hahaha, we started doing that a few months ago too. They're so much easier to care for, just dust them off occasionally.

I told my wife if she kills this one something is wrong.