Author Topic: ~20ms delay? How do I do it?  (Read 7704 times)

EBK

Re: ~20ms delay? How do I do it?
« Reply #20 on: December 02, 2016, 05:43:16 AM »
Longer delays by bouncing off . . . the Moon.

Now we're talking coolness factor! :icon_cool: :icon_lol:
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"There is a pestilence upon this land. Nothing is sacred. Even those who arrange and design shrubberies are under considerable economic stress in this period in history." --Roger the Shrubber

PRR

Re: ~20ms delay? How do I do it?
« Reply #21 on: December 02, 2016, 08:40:22 PM »
Moon-bounce is 2,400mS to 2,700mS (two and a half seconds).

Wikipedia has a sound-clip of talking off the moon, and it says you can hear an echo, but I don't.
https://en.wikipedia.org/wiki/Earth%E2%80%93Moon%E2%80%93Earth_communication

Voice is already at/past the limit for good speech quality over such a lousy link. (Some better with gigantic equipment, but that's an uphill fight.) Most practical contacts are good old knuckle-code or slow pulse techniques.
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EBK

Re: ~20ms delay? How do I do it?
« Reply #22 on: December 03, 2016, 02:04:28 PM »
Moon-bounce is 2,400mS to 2,700mS (two and a half seconds).

Wikipedia has a sound-clip of talking off the moon, and it says you can hear an echo, but I don't.
https://en.wikipedia.org/wiki/Earth%E2%80%93Moon%E2%80%93Earth_communication

Voice is already at/past the limit for good speech quality over such a lousy link. (Some better with gigantic equipment, but that's an uphill fight.) Most practical contacts are good old knuckle-code or slow pulse techniques.
If I ever find cause to build a simple buffer pedal, I think I will label it "Moon-bounce lo-fi delay" and put transceiver send/return jacks on it for giggles.  :icon_biggrin:
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"There is a pestilence upon this land. Nothing is sacred. Even those who arrange and design shrubberies are under considerable economic stress in this period in history." --Roger the Shrubber

Processaurus

Re: ~20ms delay? How do I do it?
« Reply #23 on: December 07, 2016, 02:46:09 PM »
if you can live with it being 12.3 ms, or 24.6ms, you can use a PT2396 in "easy mode". It is a single chip delay processor that can go shorter than the pt2399 that everyone uses here. Easy mode uses 4 dip switches to set the delay time.

http://www.sdiy.org/destrukto/datasheets/PT2396.pdf