simple buzzer project

[Ductapemaster]

Hey, if you think you have enough time, I could send you a 555 timer and some parts to make an oscillator. If you wanted I could assemble it all and just leave some wires for you to connect everything.

 

[andynerd]

naa thanks for that but it is ok i want a challenge and this is only a back up project in case my partner doesn't pull through.

 

[andynerd]

YAY guess what!? i tried the oscillator 9v battery and the buzzer and it worked didn't even burn out the oscillator!!!! but it was going very fast is that because i didn't limit the current?

(yes that was a bone head move if it didn't work but hey life is about taking chances^_^ )

 

[andynerd]

so i was thinking this might work

NOTE: i am not sure if i should add the capacitor or not and if i do what size? i have 100:mu:F 10:mu:F 47:mu:F and assorted ceramic pack i got from the source. and the resistor is just an approximation of what i might need i didn't set it in stone.

 

[andynerd]

there i have it working with a 150ohm resistor doesn't burn out the LED or anything the only problem is the clock oscillator is going to fast

 

[Ductapemaster]

Sorry to say this, but there probably isn't an easy way to slow down the oscillator. Unless it is a circuit and not a specific part, then you could do it. If it's just a simgle component, the onyl way you could do it is using some divider IC's.

 

[andynerd]

well i hooked it up the other way around and it worked didn't stop and start but it dulled down then got louder/brighter

 

[Ductapemaster]

Hmmmm...thats odd. Does it keep doing that? Otherwise you may have damages the oscillator.

Also, if you have a couple resistors, capacitors and 2 transistors lying around you could make a simple multivibrator circuit that could provide the pulses you need.

 

[andynerd]

2 of each kind of resistor up to 3.3mhm: and a bunch of ceramic capacitors (tested them on a Ohm meter and they didn't seem to work is that because they are capacitors or are they broke) and i have a bunch of npn transistors (scraped from an old CD player) so those simple parts i have just not specialty ones like oscillators and ic's i only have a about 15 from an old power supply(haven't looked for a data sheet)

NOTE: all my parts outside the resistors and capacitors came from a mac centris 610 that i took apart thats my electronic store