Class D amplifier using a 555 timer

Was a tedious Saturday..then i decide to play with 555 timer chip

I have made something that may be a Class D (not sure)

Not that bad the sound....has very small power...but quality is not that bad....but a lot of adjustments should be made.

I have made also another one...but it is not exactly Class D.

https://www.youtube.com/watch?v=gN4798slnUw

regards,

Carlos
 

Attachments

  • Amplificador classe D.jpg
    Amplificador classe D.jpg
    670.7 KB · Views: 338
Sorry...old charlie has not a good vision

I have measured...resistor is really 4700 ohms.

Also you can remove it and even putting a short into the diode string you will have it operating anyway..it is class B..sinal drives it.

It is an interesting toy to weekend..anything serious...has no power..and quality is just tolerable.

regards,

Carlos
 
Here you have an update... things are now better

It is evoluting.... it is still a toy...but getting better.

The input amplifier, if you need it, them use it...showing in this schematic, only, the 555 chip and the output...now i have included a filter...waveshape is correct now.... or less wrong.:eek:

You do not know uncle charlie..but things i publish are tested, assembled and operates... they are not simulator stuff...tested...built..listened.

And you can listen..here you have the first one made....now the sound is better:

https://www.youtube.com/watch?v=gN4798slnUw

regards,

Carlos
 

Attachments

  • Class D toy.jpg
    Class D toy.jpg
    133.4 KB · Views: 233
  • DSCI0007.jpg
    DSCI0007.jpg
    630.7 KB · Views: 212
Last edited: