Muff's Modules & More

zthee · Posted: Fri Jun 19, 2009 8:19 am Post subject: BBQ!

I just fried a pot!
Think it could taste well with some sauce and a baked potato.
It's peanut butter jelly time!

What have you fried, toasted or burned today? Component wise I mean. Share your chips!

BugBrand · Posted: Fri Jun 19, 2009 8:28 am Post subject:

Electro cap -- smelled like stir-fry!

Kent · Posted: Fri Jun 19, 2009 9:03 am Post subject:

How did you fry a pot?! Were you using a soldering gun? Dead Banana

I love that burst & smoking electrolytic cap smell. It reminds me of the smell of Baskin & Robbins Ice Cream Cones.

zthee · Posted: Fri Jun 19, 2009 10:13 am Post subject:

I was kinda poking around in the module with a screw driver with the power on. And all of a sudden - bright light and magic smoke! yay! This is fun!

Roycie Roller · Posted: Fri Jun 19, 2009 10:35 am Post subject:

I was circuit bending an old walkie-talkie, with the battery hanging off in my hand & it went 'pop'...Luckily it didn't explode (if that's possible). Dead Banana

Robba · Posted: Fri Jun 19, 2009 12:09 pm Post subject:

Never ever use a battery with circuitbending, always use mains!!!

hmmm.....

sanders · Posted: Fri Jun 19, 2009 1:34 pm Post subject:

I burned a CEM3340 VCO chip on a faulty Digisound PCB that I had etched myself. The chip cost me $30 and probably costs twise that much now. So stupid of me-- what a waste. It was one of my first attempts at home made PCBs. I still have the chip-- I´m hoping it will re-inanimate one day.

tony d · Posted: Fri Jun 19, 2009 6:13 pm Post subject:

pickleinn · Posted: Fri Jun 19, 2009 6:52 pm Post subject:

i was trying to trouble shoot my 281 board that wasnt working properly......as i was poking around with the multimeter, it poped and flashed and smoke hmmm.....

it looks like i touched the ground to something and smoked a trace on the pcb. i just soldered a jumper in there, replaced a cap and it worked!

now thats how you fix things Rockin' Banana!

zthee · Posted: Tue Jun 23, 2009 1:44 am Post subject:

Argh! Toasted another pot yesterday. Now I know why people use heat shrink tubes in their builds! very frustrating

So the rule is - not to have bare wire going around in the box that can short to the front panel - that's connected to ground! Poff.

But the really boring part is that one VCO won't function after the incident. waah

suitandtieguy · Posted: Tue Jun 23, 2009 2:50 am Post subject:

Roycie Roller · Posted: Tue Jun 23, 2009 2:53 am Post subject:

zthee · Posted: Tue Jun 23, 2009 3:07 am Post subject:

It was actually the pot for the built in sub oscillator I fried.

I had a resistor on the front panel going from the pot wiper to a small mixer board i built. And the leg of the resistor touched the front panel - this shorting out the pot.

I think the reason the oscillator won't work (or it works, but it's more of an LFO then a VCO) is because when I pushed +15V into GND I fried the LM394 as well. I'll swap it tonight and see if it makes a difference.

Feeding negative values into the LM3900 has been working fine. Nothing happens. Or not yet anyway.