Picture of Sound Activated Camera Flash
A quick and dirty and dangerous sound activated flash to catch moments in time

Step 1: The first thing you'll need is an amplified computer speaker

Picture of The first thing you'll need is an amplified computer speaker
The sacrificial victim here is a pair of harmon kardons from a garage sale $1
That makes for really cool photos, have you seen the smash bat, it works on the same type of thing only instead of sound it uses a touch sensor in a bat so they can capture pictures as they bust the crap out of melons and other fun things
junits156 years ago
that is really clever, nice job
PKM6 years ago
So, let me get this straight. You cut off the sound input and speaker wires from the op-amp, switch them around so the op-amp is amplifying the signal it gets from the speaker (acting as a microphone), and you wire up the amplified output of the op-amp to the SCR to switch the flash? That sounds totally doable- could you just use a microphone and an op-amp or are you using other bits of the computer speakers as well?
Tool Using Animal (author)  PKM6 years ago
That sounds about right (remember it's been two year), and yes you could probably rig a opamp the same way, I just had these handy.
Ok im really sry i cant figure this out. Im only 15 but i want to learn how to do this stuff. Here are some pictures i took of the altec lansing speaker i tore apart. could you tell me where to put some of the connections. Im not really sure what to do.
Speaker guts 001.jpgSpeaker guts 002.jpgSpeaker guts 003.jpg
Tool Using Animal (author)  soundman31037 years ago
That's alright, gimme a couple days, I have the flu right now and I haven't looked at this project in two years ;-) My brain is running slow... Do you have a multimeter? If not and you have a harbor freight nearby they are only $3.
Hey i got another question are we supposed to cut the wires comming from the black think. Here is the data sheet for it http://www.datasheetcatalog.com/datasheets_pdf/T/D/A/7/TDA7350A.shtml
thanks so much for all of your help
Tool Using Animal (author)  soundman31037 years ago
No, don't cut the leads, just add the jumper wire.
sry im a noob at this and i dont know how to find the chip number to download the data sheet. plz help thanks
Tool Using Animal (author)  soundman31037 years ago
We all were once ;-) On top of the circuit board the chip is black rectangle with 6 or 8 legs, the number is printed on the chip, you might need a magnifying glass to read it. If there is no number, it means it's a cheap chinese rip off.
schimmi7 years ago
so how many times did you accidentally set it off?
Ian018 years ago
Why does this produce an EMP?
Kataze Ian017 years ago
I think that was more of a public service announcement than anything else.
Might I suggest http://www.datasheetcatalog.com/ There are lots of datasheets there which mouser might not have.
som3thing8 years ago
lol is that a failed egg i see? great work buddie i just finished mine works flawlessly mus put up some pics and i express my utmost condolences for your digi camera TIMm
Tool Using Animal (author)  som3thing8 years ago
One of MANY failed eggs. I'd like to see some of your pix when you have the chance
evry thing electric makes electric emp its just not strong i dono why this makes a strong emp cause nomally it takes a nuke or a power transformer to have strong enogh emp to mess up any thing
phinch8 years ago
This is great. I'm definetly going to have to do this. I'm glad you took it to a new level.
Spanky8 years ago
Love the picture of the egg - good work
trebuchet038 years ago
glad to see you got this working... sorry to hear it killed your digicam :/