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Old 12th May 2008, 12:45 PM   #1
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Default simple 15m/sec delay network

Is there a simple way to make a 15m/sec sound delay circut. this is for a car.
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Old 13th May 2008, 01:35 PM   #2
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Old 14th May 2008, 11:29 AM   #3
AndrewT is offline AndrewT  Scotland
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delay turning on the ignition for 0.015Seconds.
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regards Andrew T.
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Old 16th May 2008, 11:54 AM   #4
mobyd is offline mobyd  New Zealand
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The simplest delay generator is the PT2399 - regrettably the shortest delay it can do is around 30ms. The NJU9702 does 0.5 to 32ms in 0.5ms steps, but you need a small micro to load the timing register (the littlest pic would do it). Other than that...a stretch limo with a 17 foot long cab would give you 15ms end to end.
M
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Old 16th May 2008, 01:05 PM   #5
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"The simplest delay generator is the PT2399 - regrettably the shortest delay it can do is around 30ms. The NJU9702 does 0.5 to 32ms in 0.5ms steps, but you need a small micro to load the timing register (the littlest pic would do it). Other than that...a stretch limo with a 17 foot long cab would give you 15ms end to end."

This is for a stretch RSX. The difference between my front speakers and rear is 3.002 ft.

Where can I purchase a NJU9702 and what s a small pic?
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Old 16th May 2008, 09:46 PM   #6
mobyd is offline mobyd  New Zealand
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Quote:
Originally posted by mitchyz250f
"The simplest delay generator is the PT2399 - regrettably the shortest delay it can do is around 30ms. The NJU9702 does 0.5 to 32ms in 0.5ms steps, but you need a small micro to load the timing register (the littlest pic would do it). Other than that...a stretch limo with a 17 foot long cab would give you 15ms end to end."

This is for a stretch RSX. The difference between my front speakers and rear is 3.002 ft.

Where can I purchase a NJU9702 and what s a small pic?
Googling will find you at least 2 vendors selling in onsies twosies. I bought some off Hongkong Inventory (a trading experience somewhat similar to Russian roulette but without the pleasant bits) but if I was doing what you are doing, I'd use 2 PT2399s, front set for 30ms and rear for 45ms. You'll never notice the 30ms absolute delay. PT2399s are available everywhere (Ebay etc) and are cheap as ch.... oh never mind. BTW a small pic is something like a PIC12F675.
M
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Old 18th May 2008, 09:07 PM   #7
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Thanks. I will need to investigate a little and then get back with the results or more questions.

Thanks again.
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