car sound generator circuit
car sound generator schematic diagram 555 4017 557
car sound generator schematic 555
Here we have an astable oscillator built around 555, which gives an alarm tone of 1.8 KHz directly driving a speaker. This is basic alarm circuit, which is later used in many other projects in the book. While the circuit shows only 1.8 KHz operation, it can be adapted to different applications by changing frequency and duty cycle after manipulating the timing components as per the formula.
All sounds in this circuit are generated by HT2884. There are 8 different sound effect can be produced that are 2 lazer guns, 1 dual tone horn sound, 2 bomb sounds, 2 machine gun sounds and a rifle shot sound.
this tone generator can be used to control your robot. you will need to use the tone decoder for this. to widen the range, higher or lower – substitute a higher, or lower valued capacitor for c1. for frequencies about 5khz and 15khz, use a piezoelectric element as the speaker. Use a miniature speaker for frequencies under 5khz, and use an ultrasonic transducer for frequencies over 30khz.
car sound generator schematic HT2884