A noob potentiometer question [SOLVED]
Hi!
I'm attempting to repair a Mr Black Supermoon pedal which has three potentiometers.
One pot has obviously gone bad and measures infinite resistance between middle and outer terminals.
So I'll just replace it...
However, there is one thing I don't understand...
All three potentiometers are marked B50K. The way I read it they should be linear 0-50k Ohm pots.
The two working pots both measure about 2.5k Ohms between the outer terminals.
Shouldn't they measure 50K?
Thanks for your input!
I'm attempting to repair a Mr Black Supermoon pedal which has three potentiometers.
One pot has obviously gone bad and measures infinite resistance between middle and outer terminals.
So I'll just replace it...
However, there is one thing I don't understand...
All three potentiometers are marked B50K. The way I read it they should be linear 0-50k Ohm pots.
The two working pots both measure about 2.5k Ohms between the outer terminals.
Shouldn't they measure 50K?
Thanks for your input!
- bow_and_error
- Breadboard Brother
Information
Did you remove the pots before you measured them? If not, you're bound to get weird readings as there are other components & ground interacting with the pots.
- ppluis0
- Diode Debunker
Hi Jojo and welcome to this forum.
Could you post some pictures of the pedal since you have taken it apart?
Mr Black's printed circuit designs are characterized by being very well designed and it would be nice to be able to see the inside of one of these devices here in the forum.
Cheers,
Jose
Could you post some pictures of the pedal since you have taken it apart?
Mr Black's printed circuit designs are characterized by being very well designed and it would be nice to be able to see the inside of one of these devices here in the forum.
Cheers,
Jose
- bmxguitarsbmx
- Cap Cooler
His pcb designs are symmetrical.ppluis0 wrote: ↑26 Apr 2021, 20:58 Hi Jojo and welcome to this forum.
Could you post some pictures of the pedal since you have taken it apart?
Mr Black's printed circuit designs are characterized by being very well designed and it would be nice to be able to see the inside of one of these devices here in the forum.
Cheers,
Jose
- ppluis0
- Diode Debunker
Nope.
The 8 pin IC that appears in the third image is a memory that stores a program.
The bigger chip is a digital processor that create the desired effect.
There are some programs ready to use: http://www.spinsemi.com/programs.php
And the link to explain programming: http://www.spinsemi.com/knowledge_base/pgm_quick.html
Cheers,
Jose
- ppluis0
- Diode Debunker
Perhaps exist in several places of the web more programs for this line of signal processor IC's
The couple of links posted were the first that appeared after googling, so I think that more libraries can be found.
Cheers,
Jose
BTW: did you have images of the bottom side of this board ?
The couple of links posted were the first that appeared after googling, so I think that more libraries can be found.
Cheers,
Jose
BTW: did you have images of the bottom side of this board ?