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beep sound generator using single 555

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rajaram04

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Hello sir,
I want to make circuit using single 555 timer ic so as to make a sound of simple beep beep beep beep.the circuit must have ability to vary the time period for the beep.i don't want to make sounds as it happens in buzzer or emergency door alarms.just simple light sound of beep beep only.how it is possible with a single 555 ic.As well as i want to know if there is any circuit for beep beep sound which uses only tansistors.if there is any then tell me too please its very urgent for me so as to design a security system
thanks
 

There may be some clever tricks, but generally to do it in the conventional method requires two 555's (or a single 556).
Effectively one astable for making the constant tone, and the other astable for gating it.
 

okkk sir i got it i ve that two 555 timer ic circuit diagram & thanks for explaining it well . But now let me have the circuit diagram of that beep producing part only.i dont want the gating part now so let me have the proper circuit diagram for it please :)
 

At this URL scroll down to astable, and use that circuit and formula. You just need to select resistances R1, R2 and capacitor C so that the frequency is in the audible range (maybe 500 Hz would be in the right ballpark for a security beep).
 

ohhh ya ya thats okk im very very thanks full to you the explanation is enough for me . now please tell me is any chenges made in further experiments so as to make self trigerring for the gate control to make beep beep sound on 555 ic or any single chip ic is available to make such circuits from cmos series 7400 etc ???
 

You just need to feed the gating signal into an appropriate point, e.g. the circuit here (at the bottom of the page) seems to do this - I've not tried it. Or of course you could also make it from logic gates, e.g. a quad NAND or hex inverter ic
should do you fine. It's an oscillator, and there are quite a few ways to make it : )
 

o yes sir thanks once again i ll go with it its the best way to make compressions in area im using now.
sir im still confused with this pin no.5 that whats the use of it ? how its playing vital role in desiging.im not gating it sir please help
thanks
 

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woww dir i mean a single ic is making an empire here & a general purpose 3 circuits can be wired out from it refining the purpose to solve area & cost for my research work .Sir what about the electret microphone amplifier given here in the link ? Is it useful to make amplifications for the signal out from a mouth piece of morden electronic phone set if the mic piece is used separatly ??? is it useful for that purpose or only for electret microphones ?
 

woww dir i mean a single ic is making an empire here & a general purpose 3 circuits can be wired out from it refining the purpose to solve area & cost for my research work .Sir what about the electret microphone amplifier given here in the link ? Is it useful to make amplifications for the signal out from a mouth piece of morden electronic phone set if the mic piece is used separatly ??? is it useful for that purpose or only for electret microphones ?

If you mean the inverter circuits webpage...

Then yes, it can be used for analog amplification (even though it's a digital IC). A very soft input signal might need 3 stages of inverters. The 1M resistor will be connected from the input to the output 3 inverters away. Notice it will not work to use only 2 inverters.

You must experiment to find the safe and workable bias arrangement, and the proper output impedance arrangement, and proper output capacitor.
 

yes brad sir i ll surely do as you are saying so deeply studying before doing any practice here :) thanks a lot

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sir whats the diffrence between 4049 & 4069 ic ? please reply :) thanks
 

Several times I have seen statements that the 4069 is better to use as an analog amplifier.

Also that you should try to use the type that has the designation UB or UBE.

Something to do with it having more symmetry to the waveforms above and below centerline. Also that the 4069 lacks internal buffers, thus it draws less current when operated halfway between supply V and ground.

The 4049 has such buffers, and draws more current.

Such as the discussion at this link:

https://electro-music.com/forum/topic-47921.html
 

okk sir i got it :) please let me know which one is more suitable for making analog to digital convertor ? as u explained i guess its obviously 4069 . . right am i ? please reply
 

which one is more suitable for making analog to digital convertor

Does this refer to an ADC which outputs a binary value for a given volt level? This requires more complex components than an inverter.

As for the 4069, it has a higher output impedance than the 4049. The latter can drive a greater load. (As I recall).

An inverter output changes state when the input crosses a middle level. The output is either hi or low...

Unless you cause it to meander in the middle region by adding the feedback resistor network (mentioned in preceding posts). Then it becomes an analog application for a digital IC.
 

120-f31ee2a977.gifImage5.gif

sir i mean this type of convertors as shown here (with an inverse output from invertor ic is ok no matter)
but is it possible to make this by using such ics or totally hv to use simple op amp like 741,358 etc etc ??
 

1.

The first small image shows an ADC. (The large image could not be read by my computer.) It looks as though the led's demonstrate what is coming from the output terminals. Usually an ADC is used without led's.

2.

The second image is an led bargraph made from op amps. Low-cost op amps are suitable for this. A quad op amp such as the 324 would be economical and compact.

The 3914 IC bargraph driver is also popular for such projects. It can light a stack of ten led's in sequence.
 

ohh thats really nice what you explained in very short . I got this image on internet only the i.c. in the image is for a/d convertor as explained there.i asked for this ic in market its available its a direct a/d convertor available for microprcessors as explained by the dealer :)
 

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