VGA Oscilloscope - Revision history

Adamcolton at 15:30, 23 August 2018

2018-08-23T15:30:57Z

← Older revision		Revision as of 15:30, 23 August 2018
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	I think this would use DRAM for memory. It might make sense to save the measurements to a smaller, faster space and use an intermediate memory to draw the VGA display.		I think this would use DRAM for memory. It might make sense to save the measurements to a smaller, faster space and use an intermediate memory to draw the VGA display.

	~~[[Category:Projects]]~~
	[[Category:Electronics]]		[[Category:Electronics]]

Adamcolton at 02:48, 22 February 2017

2017-02-22T02:48:46Z

← Older revision		Revision as of 02:48, 22 February 2017
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	This would have a weird profile that the scope could operate at a very high frequency, but only be able to display ~1fps. But in reality, that's fine because it would work fine with lower range frequencies and be able to be used in a trigger mode for high frequency.		This would have a weird profile that the scope could operate at a very high frequency, but only be able to display ~1fps. But in reality, that's fine because it would work fine with lower range frequencies and be able to be used in a trigger mode for high frequency.

			I think this would use DRAM for memory. It might make sense to save the measurements to a smaller, faster space and use an intermediate memory to draw the VGA display.

	[[Category:Projects]]		[[Category:Projects]]
	[[Category:Electronics]]		[[Category:Electronics]]

Adamcolton at 15:02, 16 July 2016

2016-07-16T15:02:40Z

← Older revision		Revision as of 15:02, 16 July 2016
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	After a little (very little) research, the problem I'm seeing is that most microprocessors aren't fast enough to keep up with VGA. What I need is a memory chip to hold the video image and a circuit to convert the image to VGA. This should be it's own test project before taking on the oscilloscope.		After a little (very little) research, the problem I'm seeing is that most microprocessors aren't fast enough to keep up with VGA. What I need is a memory chip to hold the video image and a circuit to convert the image to VGA. This should be it's own test project before taking on the oscilloscope.

	~~To actually do~~ an ~~oscilloscope, have a trigger circuit get the input and write it out to the memory chip~~.		Here's instructions from someone who did it with an Arduino: http://www.instructables.com/id/Girino-Fast-Arduino-Oscilloscope/

	~~Here~~'s ~~instructions from someone who did~~ it with ~~an Arduino: http://www~~.~~instructables.com/id/Girino-Fast-Arduino-Oscilloscope/~~		I see the circuit as having 3 blocks; the scope, the display and the controller. The display circuit would use my idea for driving [[VGA]]. The scope circuit would be almost the inverse - it would be active at a very high frequency (but no microcontroller) and automatically take a reading from a ADC every period and write it to a memory chip. The controller would allow the user to manage settings for both circuits and would translate the readings from the scope to the display.

			This would have a weird profile that the scope could operate at a very high frequency, but only be able to display ~1fps. But in reality, that's fine because it would work fine with lower range frequencies and be able to be used in a trigger mode for high frequency.

	[[Category:Projects]]		[[Category:Projects]]
	[[Category:Electronics]]		[[Category:Electronics]]

Adamcolton at 12:55, 21 March 2012

2012-03-21T12:55:14Z

← Older revision		Revision as of 12:55, 21 March 2012
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	To actually do an oscilloscope, have a trigger circuit get the input and write it out to the memory chip.		To actually do an oscilloscope, have a trigger circuit get the input and write it out to the memory chip.

			Here's instructions from someone who did it with an Arduino: http://www.instructables.com/id/Girino-Fast-Arduino-Oscilloscope/

	[[Category:Projects]]		[[Category:Projects]]
	[[Category:Electronics]]		[[Category:Electronics]]

Adamcolton at 19:57, 20 December 2011

2011-12-20T19:57:03Z

← Older revision		Revision as of 19:57, 20 December 2011
Line 4:		Line 4:

	To actually do an oscilloscope, have a trigger circuit get the input and write it out to the memory chip.		To actually do an oscilloscope, have a trigger circuit get the input and write it out to the memory chip.

			[[Category:Projects]]
			[[Category:Electronics]]

Adamcolton: Created page with "I couldn't find one, but it would be really cool to make the front end of an oscilloscope that you just need to plug in a VGA monitor. In theory, it shouldn't be too hard with a ..."

2011-09-14T13:45:37Z

Created page with "I couldn't find one, but it would be really cool to make the front end of an oscilloscope that you just need to plug in a VGA monitor. In theory, it shouldn't be too hard with a ..."

New page

I couldn't find one, but it would be really cool to make the front end of an oscilloscope that you just need to plug in a VGA monitor. In theory, it shouldn't be too hard with a micro-processor.

After a little (very little) research, the problem I'm seeing is that most microprocessors aren't fast enough to keep up with VGA. What I need is a memory chip to hold the video image and a circuit to convert the image to VGA. This should be it's own test project before taking on the oscilloscope.

To actually do an oscilloscope, have a trigger circuit get the input and write it out to the memory chip.