| Science Forum Index » Electronics Forum » Convert "ping" on piezo to LED flash?... |
|
Page 1 of 1 |
|
| Author |
Message |
| Peter Hucker... |
 Posted: Wed Mar 18, 2009 2:55 pm |
|
|
|
Guest
|
|
| Back to top |
|
|
|
| Bob Larter... |
| Posted: Mon Mar 30, 2009 2:28 am |
|
|
|
Guest
|
Peter Hucker wrote:
[quote:8c0b43d607]I have a device which makes a "ping" noise on a piezo tweeter (one of those 10p sized things you get in wrist watches). Is there any way I can connect this output to some LEDs to flash when it makes the noise?
[/quote:8c0b43d607]
A pair of LEDs in series with one of the piezo wires might work.
Eg:
LED1 Piezo
O----+-|<-+--|o|----O
'->|-'
LED2
If it's a piezo with its own oscillator, something like this might work:
LED1 + -
O------>|----|o|----O
Piezo
--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^--------------------------------------------------------------- |
|
|
| Back to top |
|
|
|
| mark krawczuk... |
| Posted: Sat May 30, 2009 8:08 pm |
|
|
|
Guest
|
hi, i have a schematic , that connects up to a knock sensor from a car
engine , ( same thing inside the knock sensor , peizo ?) and flashes a led
when it detects knock..
mark k krawczuk at (no spam) adam.com.au
"Peter Hucker" <none at (no spam) spam.com> wrote in message news:op.uqz2tixhmk2j66 at (no spam) i7...
[quote:434b829938]I have a device which makes a "ping" noise on a piezo tweeter (one of those
10p sized things you get in wrist watches). Is there any way I can connect
this output to some LEDs to flash when it makes the noise?
--
http://www.petersparrots.com http://www.insanevideoclips.com
http://www.petersphotos.com
Why do people point to their wrist when asking for the time, but don't
point to their crotch when asking where the bathroom is?[/quote:434b829938] |
|
|
| Back to top |
|
|
|
|
