dtctr - Pocket sized 15Khz hsync generator.

Must have 3rd party solutions.
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ube
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dtctr - Pocket sized 15Khz hsync generator.

Post by ube » Sat Dec 15, 2018 12:16 pm

The dtctr is a pocket device for use for testing if a monitor is 15KHz capable, a must if to be used with Atari ST and Amiga amongst other computers. It's powered by a 3V CR2032 battery and by the press of the power button it generates a test image within 6 seconds as of now since the firmware is really slow.

The firmware is based (slightly tweaked) on Nick Gammons work.
The hardware is basically an Arduino pro mini running at 16MHz, and can be programmed using the ISP header on the board.


Design files and source code.


front.jpg
front.jpg (79.02 KiB) Viewed 360 times
back.jpg
back.jpg (87.44 KiB) Viewed 360 times
master of the bare pcb

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DrF
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Re: dtctr - Pocket sized 15Khz hsync generator.

Post by DrF » Sat Dec 15, 2018 3:09 pm

What a clever and time saving device :)
The amount of times i've read a spec sheet for something and its not had that feature or been completely wrong :lol:

Forgottenmyname
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Re: dtctr - Pocket sized 15Khz hsync generator.

Post by Forgottenmyname » Sat Dec 15, 2018 5:23 pm

Very interesting. Does it just sync the screen or display anything?

Thanks for sharing the code etc.

ube
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Re: dtctr - Pocket sized 15Khz hsync generator.

Post by ube » Sat Dec 15, 2018 7:23 pm

Here's an image of my 1990FXp with it's info screen active while generating a signal. It's an earlier design, but everything is the same.
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sample-nec1990fxp.jpg
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master of the bare pcb

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