Re: ultrasonic speaker simple amplifier

In article <yEl7i.315151$ZA5.228316@xxxxxxxxxxxx>, "Infundibulum" <Infudibulum@xxxxxxxxxxxxxxxxxx> wrote:
Hi

I am using a simple 555 timer to create a 20khz + square wave feeding into
an 8 ohm super tweeter rated up to 40Khz. I'd like to raise the power
output on the speaker above what I get from the 555 timer pin 3 output.

I am using the tone generator circuit show here:
http://www.reconnsworld.com/audio_tonegenerate.html

Help on the output circuit to switch a power transistor with the speaker
would be appreciated.

You will not get anything out until you apply a voltage source.

I have used 18 volts for this type circuit, two 9 volt batteries.

The piezo can take up to an equivalant 35 volts RMS
If there was a way to push pull two 555's, that would be nice.

greg

.

Relevant Pages

  • Re: Basic MOSFET Q., Also, "ground" vs "positive", & voltage matching
    ... power systems, ... the designer decided to call "zero volts", and to use as a reference ... when measuring voltages elsewhere in the circuit. ... voltage is 2.5 volts. ...
    (sci.electronics.basics)
  • Re: Help needed designing simple circuit
    ... so I'm trying to come up with a simple (maybe even elegant) solution ... This gave me a nice 5 volts when the power was ... circuit when the light comes on. ...
    (sci.electronics.repair)
  • Re: Trouble With A Very Simple MOSFET Amplifier
    ... I've breadboarded a circuit out of Forrest Mim's _Getting_Started_.... ... power source: 8.61V ... The gate should have about one to four volts with respect to the ...
    (sci.electronics.basics)
  • Re: My Stove
    ... Resistance is what causes the voltage drop. ... So power is volts times amperes. ... The last one is probably the easiest to apply to the range circuit. ...
    (sci.electronics.basics)
  • Re: ultrasonic speaker simple amplifier
    ... output on the speaker above what I get from the 555 timer pin 3 output. ... Help on the output circuit to switch a power transistor with the speaker ... I have used 18 volts for this type circuit, ...
    (sci.electronics.design)