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New design of diy-VT100 (LCD with 80x24 chars)

A project log for diy-VT100 - A Miniature hardware terminal

Miniature VT100 with all the bells and whistles

Kuldeep Singh Dhaka 03/20/2017 at 16:318 Comments

Stuff arrived:

- Components (Except STM32F469V)

- 5 Inch DPI LCD (RGB - 40pin)

(New 5 inch LCD compared to the 2nd design)

Ordered but waiting:

- PCB (Expected at weekend)

- Microcontroller (STM32F469V - Sample requested from ST. since the uC is bit rare)

This time, design incorporate a Class AB amplifier to drive speaker (via DAC).

This will be used to generate original like VT100 bell.

Discussions

Gravis wrote 08/17/2017 at 21:58 point

Wouldn't it be easier to just use a piezo element to generate the 800Hz sound?

  Are you sure? yes | no

Kuldeep Singh Dhaka wrote 08/18/2017 at 00:49 point

https://en.wikipedia.org/wiki/Piezoelectric_speaker

"their frequency response, in most cases, is inferior to that of other technologies, especially with regards to bass and midrange"

"This is why they are generally used in applications where volume and high pitch are more important than sound quality."

  Are you sure? yes | no

Gravis wrote 08/19/2017 at 00:52 point

I'm confused, I thought the point was the emit a 800Hz tone, not play music.

  Are you sure? yes | no

Kuldeep Singh Dhaka wrote 08/21/2017 at 06:05 point

the piezo element sound will be different that of the sound made by VT102.

Not playing music, but the audio recording.

  Are you sure? yes | no

kleykenb wrote 08/17/2017 at 13:49 point

Visual beep will be fine ;-)

  Are you sure? yes | no

Kuldeep Singh Dhaka wrote 08/18/2017 at 00:43 point

If i recall correctly, visual beep is implemented.

  Are you sure? yes | no

Sandeep Kumar wrote 03/20/2017 at 18:25 point

Thats cool.We will keep you updated.
5 days more for the pcbs to arrive :)

  Are you sure? yes | no

Craig Hissett wrote 03/20/2017 at 18:06 point

Yeah - definitely still want one of these! :-)

  Are you sure? yes | no