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

The sacrificial victim here is a pair of harmon kardons from a garage sale $1

Comments

[Ben The Builder]

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

[junits15]

that is really clever, nice job

[PKM]

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]

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.

[soundman3103]

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.

[Tool Using Animal]

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.

[soundman3103]

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]

No, don't cut the leads, just add the jumper wire.

[soundman3103]

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]

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.

[schimmi]

so how many times did you accidentally set it off?

[Ian01]

Why does this produce an EMP?

[Kataze]

I think that was more of a public service announcement than anything else.

[The Lightning Stalker]

Might I suggest http://www.datasheetcatalog.com/ There are lots of datasheets there which mouser might not have.

[som3thing]

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]

One of MANY failed eggs. I'd like to see some of your pix when you have the chance

[i make shooting things]

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

[phinch]

This is great. I'm definetly going to have to do this. I'm glad you took it to a new level.

[Spanky]

Love the picture of the egg - good work

[trebuchet03]

glad to see you got this working... sorry to hear it killed your digicam :/