Can the buzzer work?

 

hi Kevil.
Your link is insisting a disable my AD blocker, no way.
Can you please post a Copy of the link info.?
E

 

It's possible to bypass the "Nag-Screen".
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Here's how I would do it ............
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Note: the circuit shown in post #3 works well with the CMOS version of the timer but is not so well with the NE555.

Edit: Broken link removed.

 

Can the buzzer work?

Depends on what you mean by "work". Step one in getting help from a forum is to explain what it is you are trying to achieve, and what is not working for you.

Is the buzzer supposed to:

a) pulse on and off, or

b) buzz for a while and then stop, or

c) wait a while after power is applied, and then stay on continuously, or

d) something else

? ? ?

ak

 

The Pot, and the Capacitor,
in the Schematic I provided are also sized for ~0.5hz,
which is not exactly a "Buzz" Frequency !!!

Changing the Capacitor to somewhere around 10nF will raise the Frequency to a usable range.
Or, using a ~1K Pot.
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The characteristics of the buzzer are important. One that draws a lot of current may overload a TLC555 (CMOS IC) but could work with a NE555 (BJT IC), albeit perhaps needing a higher supply voltage than 3V.
What are the voltage rating and current draw of the buzzer?

 

This might be a hasty freshman generalization, but when I see "buzzer" or "beeper", I think of something that oscillates on its own when power is applied, not something that needs a driving waveform at some desired output frequency.

In post #1, pin 6 (Threshold) is grounded and there is no feedback from pin 3 (Output). Thus, the 555 is not oscillating. Combined with the reference designator "BZ", I think it is safe to assume that the 555 is acting as a power source for a noise-maker of some type.

ak

 

Can the buzzer work?

Depends on what it is supposed to do? Forget the details of the circuit and describe the behavior that you are trying to achieve. Imagine you are asking someone to design and construct a black box that has something in side of it. You don't know and don't care what, all you care about is that it behave a certain way. What is that way?

 

The datasheet for the TLC555C shows that with a 3V supply, its output can be as low as 1.5V at only 0.3mA which is almost no power.
An electromagnetic buzzer can draw 100mA at 6V and produce a loud low frequency buzz.
A piezo beeper can draw almost no current at 3V which produces a very low sound level or draw 12mA at 12V and be loud at its high pitch resonant frequency.
Please post the datasheet for your buzzer.

 

Depends on what you mean by "work". Step one in getting help from a forum is to explain what it is you are trying to achieve, and what is not working for you.

Is the buzzer supposed to:

a) pulse on and off, or

b) buzz for a while and then stop, or

c) wait a while after power is applied, and then stay on continuously, or

d) something else

? ? ?

ak

The answer is C.

 

The characteristics of the buzzer are important. One that draws a lot of current may overload a TLC555 (CMOS IC) but could work with a NE555 (BJT IC), albeit perhaps needing a higher supply voltage than 3V.
What are the voltage rating and current draw of the buzzer?

Buzzer parameters: 3V , Max 25mA, 2300Hz +- 200Hz, picture here

 

The datasheet for your piezo beeper shows that with a 12V supply, it draws a maximum of 15mA and is loud when it is only 10cm (4 inches) from your ear. Its graphs go down to 8V, 8mA then will be a little less loud.
The TLC555 with a 3V supply cannot drive the beeper with a supply that is only 3V and the output going high.
But it will probably work (but not loud) with 5V or 6V supply with the output going low.

 

The answer is C.

Only if the TS says so.

ak

 

The datasheet for the beeper was deleted.

 

Sorry, I just updated the data for the buzzer.

 

TLC555 is used.

 

Sorry, I just updated the data for the buzzer.

The graph on the datasheet showed supply voltages from 8V to 15V, how much sound level (at 10cm distance) and how much supply current. It did not show sound level and supply current below a supply of 8V

Here is part of the datasheet of a similar but Name-Brand piezo beeper:

 

Nothing on the output.

 

Finally, I solved it.