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Need I.D. on Circuit Board Items

I took one of my old laser guns apart a little while ago, but I'm not very tech-savvy. I took these pictures (very sorry about the bad exposure, blur, and quantity, I'm a bit tired) to see if any of y'all could help me. All I know right now is: There are two circuit boards (one from the gun, one from the vest that you shoot) The cone-shaped black thing is the IR diode There is a receptor on the vest for the IR (no duh, right?) There are quite a few resistors and capacitors There are quite a few switches and push-button ignitions (used for starting games) There is a speaker Things I would like to know: Is the speaker perhaps of any quality, say, for amplifying songs? What are those semi-circle shaped black things, under them on the circuit board it says something along the lines of Q3? The capacitors say 10v on them. (One even says 25v on it.) Does that mean it handles 10v? What is the best way to remove the solder from the wires and board so I can usify (my own word) the parts? What is the yellow box-shaped object on the smaller circuit board (you can see it in the fourth. sixteenth, and last picture)? What is the circular metallic object on the larger board (seen best on the twelfth picture)? Thanks for all and any help!

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Bran (author) 9 years ago
Thanks for all the help guys. Another question has popped up though: There are so many resistors and stuff on the board. Is there any way to tell the required voltage needed to power the IR? I don't want to remove it and then blow it up by overpowering it. Btw, the gun was originally powered by 3 AAs.(4.5v) Thanks again.
adale9 years ago
One wire is the signal side and the other is the return. You gotta have both for a speaker to work
LasVegas9 years ago
That black blob on the bottom of the circuit board is the IC of the circuit. It's the heart of the whole circuit and cannot be removed. gmoon is right about the audio transformer. It's just used to boost the noises that come out of the thing. The speaker's crap and not designed for high fidelity. It's also probably a 4ohm speaker. I wouldn't use it with an iPod.
Bran (author)  LasVegas9 years ago
Ahh, thanks. Though the speaker is lo-fi, would it still be possible to hook it up? I'm just wanting to experiment. Thanks.
LasVegas Bran9 years ago
The speaker would be fine for simple projects like sound effects and such. I wouldn't use it for anything really serious. You iPod need two speakers (stereo), ideally through an amplifier if you want to maintain quality.
Bran (author)  LasVegas9 years ago
Good thing I got two guns! Hmm, amplifier, not sure about that one there. I'll have to search my house for one. Thanks!
LasVegas Bran9 years ago
BTW: That orange thing with the ball in it is a tilt switch.
gmoon9 years ago
"That Yellow Thing" is a transformer.

The black 'Q's are transistors. That circular metallic thing might be a trim pot (potentiometer) but the pix's a little blurred.

Voltage rating on the caps is maximum--doesn't necessarily mean they reach that V. The speaker could be reused, but I doubt it's great quality--try it.

I would leave the wires connected unless you need extra length. Then either unsolder or splice more wire as needed.
Bran (author)  gmoon9 years ago
Do you know what the transformer's job is in a toy gun? Thanks for the help!
gmoon Bran9 years ago
Might just be for the audio speaker, that's a pretty common use of a transformer. Just a guess, since I don't know much about the circuit. Does the speaker connect directly to the board w/ the transformer?
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