Bandito II umax

[Allen]

Can anyone tell me how to lower the audio freq on the Bandito II umax?It is set to high for my preference.
thanks,
Allen

[Peter-Sweden]

Re: Bandito II umax

Hi Allen

The audio frequency is set to 625Hz as default.
Move the cathode on the diode that connects to pin 11 on the 4024 and connect it to pin 5.
By doing so, you half the frequency to 312.5Hz.
Hopefully it will fit your ears better.
gl hf

[Goodrat]

Re: Bandito II umax tone

When I lowered mine, I added another diode to pin 5 rather than moving one. I have to look up the frequency, but I don't think it was half.

[Goodrat]

Here is the table I made

.



Tone pulses post

[Peter-Sweden]

Re: Bandito II umax tone

By moving the diode you'll get a period of 3200us and it's low for 400us.
By adding a diode you'll get the same period: 3200us, but it's low for only 200us.
Frequency is 312.5Hz for both.

[Goodrat]

Re: Bandito II umax tone

OK Peter.
I wonder which one sounds more pleasing? Have you tried both

[Peter-Sweden]

Re: Bandito II umax tone

Actually, it's all theoretical so far. I'm looking for a good PCB before I start building.
Maybe I'll make my own PCB with a switch for high/low tone =)