Fortune Systems looooong keyboard with Digitran capacitive switches (conversion)

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User101

22 May 2019, 09:04

xxhellfirexx wrote:
22 May 2019, 08:47
User101 wrote:
22 May 2019, 06:47
Interestingly, your typing video sounds very different compared to the other supposedly same keyboard.
https://www.youtube.com/watch?v=rl-Z9zH7A8Y
This one i mean.
Any idea whats the cause?
Not having the top case can affect the sound.
Indeed. Also, it seems like that in the video OldIsNew did not bottom out the switches. So we can only hear the leaf spring sound.
Just an assumption. Nothing certain.

User avatar
snacksthecat
✶✶✶✶

22 May 2019, 15:29

Image

Last night I was trying to figure out how to integrate the speaker and volume knob into this project. The circuit is a bit over my head. Anyone out there feel like dropping some knowledge on me? I tried to make a schematic of what I see on the PCB.

By the way, this speaker is LOUD. Even on the lowest volume it's pretty loud, but crank it up and your neighbors will think you're testing your fire alarm. At least that's what my girlfriend thought I was doing.

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snacksthecat
✶✶✶✶

01 Aug 2019, 02:07

halp

Lbibass

01 Aug 2019, 02:19

snacksthecat wrote:
01 Aug 2019, 02:07
halp
Mood.

User avatar
snacksthecat
✶✶✶✶

02 Aug 2019, 01:50

User101 would really like to see this reborn with a buzzer.

I don't think I can keep the buzzer soldered onto the original board like it is and get it working like that (in place). So I'm borrowing a buzzer from another keyboard. I understand conceptually how this should work (i.e. apply power, produce sound) but I have no education of circuits and how electricity works.

Image

I've got this little guy, how do I make it buzz?

User avatar
purdobol

02 Aug 2019, 12:03

Connect positive lead to any free pin on the controller.
Negative to the ground.

The rest is software really. Set the pin as output and change the state (High, Low) when button is pressed.
If the buzzer is to loud add resistor in series to the positive lead. High resistance = lower volume. Or add potentiometer as a volume knob.

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