Petit Crouton problem

**thepowerofthedarkside** · 05-13-2014, 09:59 AM

I've got a Petit Crouton running a red/red/white tri-star, with a red switch LED, crystal chamber(run from main led pads), and a 2w bass speaker.
Everything works perfect, but one component on the board gets exponentially hot during even a small amount of operation. I am running everything outside the hilt, with fully charged and protected batteries.
Here is a pic of the board, with the heated component circled:

pc problem.jpg

I'm not sure if this is a problem, but I'd really like to NOT burn out a $130 board!

**Silver Serpent** · 05-13-2014, 10:12 AM

For clarification, do you have resistors on your switch LED and your crystal chamber LED?

Some parts will get pretty warm to the touch, but shouldn't burn you.

**thepowerofthedarkside** · 05-13-2014, 10:16 AM

Originally Posted by Silver Serpent

For clarification, do you have resistors on your switch LED and your crystal chamber LED?

Some parts will get pretty warm to the touch, but shouldn't burn you.

Yeah, but now that I think about it, I changed the wiring from my original schematic, and I don't think I changed the resistor values. I'll have to check. Thanks so much!

**Silver Serpent** · 05-13-2014, 10:27 AM

If you changed the color of your accent LEDs, you'll normally need to recalculate resistor values.

Check your solder joints as well. Be sure you didn't accidentally bridge anything. If something was accidentally connected, then heat issues can occur.

**thepowerofthedarkside** · 05-13-2014, 10:41 AM

Originally Posted by Silver Serpent

If you changed the color of your accent LEDs, you'll normally need to recalculate resistor values.

Check your solder joints as well. Be sure you didn't accidentally bridge anything. If something was accidentally connected, then heat issues can occur.

Okay, I checked both the resistors and the all my connections. Everything seems to be fine.
I'm running the two red LEDs in series from the main board driver at 700mA, could this be a problem?
I also turned down the speaker volume in an attempt to curb the heat, to no avail.
The component gets REALLY hot; enough to cause pain.
Do you know if its possible burning out could cause the board to stop working, or would it not really matter, theoretically?

**Silver Serpent** · 05-13-2014, 10:45 AM

A good picture of your wiring would be helpful.

Unless I see something obviously amiss on the wiring pic, I'll have to leave this to a more experienced troubleshooter.

Two reds in series shouldn't cause issues for a PC. I'm not certain what that component is responsible for, or the consequences if it burns out.

**Forgetful Jedi Knight** · 05-13-2014, 11:03 AM

Also point out the component that gets hot. I have a feeling I know which one it is, but I want you to identify it.

**RavenXp** · 05-13-2014, 11:09 AM

I'm not seeing where that particular component could even be accidentally bridged anywhere. Not near a used pad. As for what it's used for, it looks like it might be part of the main power system from the battery to the board chips. My guess anyway.