The Sinclair QL Forum

New ATTiny85-P20 chips are available from Pi Hut for £2.50 so just get another one.

It was a good event. Extremely busy on Saturday and only slightly less so on Sunday.

Don't worry about not saying good-bye.

Hi,

l will get some PCBs made for Stephen's sound board and get one fitted to my vDrive.

Just out of interest, there was going to be an official vDrive sound addon called vSFX, but Charlie must of not got arou d to making it a product.


The last time I ordered 5 from PCBWay they sent 10 for ...

You can disable the beep in software.

As for "powered continuously", on my board it's not. The ATTiny85 is powered on by the transistor which is controlled by the access LED voltage. The code would need to be highly modified to look at a pin on the ATTiny85 and then run the sound file, but probably ...

Derek_Stewart wrote: Mon Jun 02, 2025 4:25 pm Hi

Do you have Gerber files to make more PCBs

Yes, on the github repository: https://github.com/stephen-usher/vDrive-Sound-Board

I don't have a "Digispark" ATTiny, I just use a DIP Atmel ATTiny85 chip. The LED output turns on the transistor which regulates the power to the chip, so the ATTiny85 chip powers up and starts working almost instantly.

This is the version made with a proper PCB.

IMG_2421.jpeg


Here's it in ...

This was my original prototype. You can see the speaker I'm using.

https://youtu.be/VhUG1TIi_j8

When the speaker is put into the Microdrive enclosure that becomes a sound box for it so you get some of the lower frequencies.

Well, if you have Toolkit II you should be able to do a res_128 to go into 128K memory mode and then either write a SuperBASIC or assembler memory tester for the upper RAM which merely "POKE"s and "PEEK"s data into the addresses above the 128K boundary, as that will not be being used by the system ...

Derek_Stewart wrote: Thu May 08, 2025 7:04 am Hi Stephen

Do you have your layout computer controlled?

Only in that the Zero 1 has a TMS1000 microcontroller running the system (and each loco decoder also has a TMS1000 in it).

Well, the layout had its first powered test today...
https://youtu.be/V6sljJrocpM

(The "youtube" button in the post doesn't work.)