Guru
Joined: 11/02/2018
Location: AustraliaPosts: 3065
| Posted: 12:16am 29 Nov 2022 |
Cross posted with an edit to my previous post.
The frequency seems odd but it still should work. Try measuring with a multimeter frequency range. (some only go to 20kHz so check its specs.)
I will have a go at it later.
Later.
> OPTION AUDIO 4, 5
> PLAY TONE 440, 1000
>
Feeding into the one transistor circuit with a 16 ohm speaker it works well.
With a multimeter
Pico output 1.57V @ 40.08kHz
B-E 430mV @ 40.08kHz
C-E 4.1V @ 40.08kHz
Edited 2022-11-29 10:55 by phil99