If your speaker is a standard speaker, you might fry it with DC current. Speakers should be capacitively coupled to your supply.

3V? I very much doubt it.

 

There about nothing on a 12f508 or 509. I't's only good to top down code there is no ADC
The timer you have to poll to do anything useful.

 

There about nothing on a 12f508 or 509. I't's only good to top down code there is no ADC
The timer you have to poll to do anything useful.

Sorry but I don't understand what you mean...

 

Why are you using an old fashioned high current magnetic mechanical transducer (speaker) instead of a modern low current piezo beeper that has its own oscillator inside?

Basically because it is what I've found of that size...
Do you have a 10x10x2mm (more or less)device to suggest?

 

3V? I very much doubt it.

3 volts on an 8 ohm speaker is 1.25 watts continuous if the output pin is left high.
Most little speakers are rated for 0.5W to

Sorry but I don't understand what you mean...

He was answering my post. Ignore my post and the 9ne immediately above unless you elect to use a PIC with ADc.

 

You should add current limiting resistors to GP1 and GP2.

You need a pull-up resistor on GP3.

If your speaker is a standard speaker, you might fry it with DC current. Speakers should be capacitively coupled to your supply.

GP3 is set with weak pull up.

GP1 and GP2 current limiting resistors... are these a must?

 

GP3 is set with weak pull up.

Ok,

GP1 and GP2 current limiting resistors... are these a must?

Your pins will have a direct connection to ground (less diode drop), with no resistance. You will burn the GPIO pin as soon as it is pulled high as an output.

 

There about nothing on a 12f508 or 509. I't's only good to top down code there is no ADC
The timer you have to poll to do anything useful.

Means it's not much of a chip every thing would need to be done in code no timer flags
Do ADC not much of anything

 

Your pins will have a direct connection to ground (less diode drop), with no resistance. You will burn the GPIO pin as soon as it is pulled high as an output.

I certainly don't believe that.

 

I guess the diodes are leds if so this is better use a 220 for R2 R3 R4

 

I guess the diodes are leds if so this is better use a 220 for R2 R3 R4
View attachment 143988

Yes they are.
They are part of an RGB led, the one with the resistor in my original scheme is the red one.