Evasive Beeping Thing/555 timer/Annoyatron Schematic

[haz939]

Hi I have just bread-boarded the original circuit and it works It does however have a few problems the tone generates every minute not 5, and the tone is quite high pitched. Needs a few more tweaks.

[hannobisschoff1]

Lol, your ohms sign is the wrong way around, and R5 is wired as a normal resistor.

[JohanRonstrom]

Great! What kind of pot could I use, and where to put it, to be able to change pitch?

[BlackandChrome]

I get a primarily on output. From the sounds of it the signal is high until the capacitor charges then begins a periodic pulse off then back on. The problem obviously is in the first 555 area because it screams like a charge when the second 555 is hooked up to +9v. I'm using LM555cn timers with a vn10lm FET, and piezo speakers. Any ideas?

[Porcupinespecial]

NICE VIDEO!!! I WANT TO MAKE ONE

[pietzeekoe]

so the schematic provided by kipkay is faulty and wont work as he says it would?

[pietzeekoe]

Sorry I ment would a 2N2907A TO18 transistor work cause it needs to be a pnp right?

[pietzeekoe]

would a 2N3819 TO92 transistor work?

[BlackandChrome]

Perhaps a photo resistor in line with R1 would make this more annoying. Beeps twice as often when the lights are out and your trying to sleep?

[jsjassem]

very nice job man keep going 555 timer Schematic

[xx75vulcan]

I followed your schematic, and my board gives me a constant, faint hight pitch beep. It's a constant beep with no pauses (at least not for the 5 minutes I listened to it) and it's not as strong as I think/would-like it to be. Any advice?

[Jonathanstrawberry20]

@xx75vulcan Yes. When I was trying to figure this out myself I had the same problem. It is most likely ratio between you r1 and r2 resistors. It can also have to do with your c1 capacitor. Try switching the resistors out and see how it changes.

[foxxtrotalpha]

all those links on sidebar are down

[wakauai7wsxedcrfvqaz]

Very nice but it seems like with a uniform cycle time it would be fairly easy to locate. How would a person make the beep completely random in say between 5 to 10 minute intervals?

Short intervals would make it easier to find too I think. I'd want them to get tired of listening for it and, as soon as they give up and go about their business, have it beep again.

My objective is to induce insanity. That's what friends are for. yuk yuk yuk

[JaysEatingWorld]

Yeats mine wasn't working. I'll try this. Do I still need the 3409's?

[Jonathanstrawberry20]

Thanks I'll have to look into it.

[greytale]

Nice schem, a very straightforward little device.

A 556 would allow you to do the same without having two chips, although sometimes the 555s have more pin outs to do stuff. :)