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Topic: sine wave generator (Read 4 times) previous topic - next topic

AWOL

NB 40kHz (25us cycle time)
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

aphy

so what's the simplest way to do?

AWOL

Well, depends what you're trying to do. (you haven't said)
The spec says 85V full-whack, but only with a 10Hz repetition rate.
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

aphy

what I'm trying to do is just to use arduino as replacement for function generator. so I just need to output sine wave using arduino with frequency of 25 kHz.

AWOL

#9
Jun 22, 2011, 01:58 pm Last Edit: Jun 22, 2011, 02:02 pm by AWOL Reason: 1
These devices tend to be very resonant, and 25kHz is a long way off the spec of 40kHz, so it won't be very efficient at 25kHz.
Can you tell us what you want to do with this transducer/sensor pair?

The spec says you can drive it up to 85V, but only with 16 cycles of 40kHz (0.4ms) every 100ms. It will probably ring for at least as long (up to maybe a millisecond) again.
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

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