Activating a crystal.

Dear Everyone,

Is it possible to activate a crystal (20KHz) by just directing a DC voltage in series with it?

no.

remember it is still just a rock.

u can use a cmos inverter to make it activate.

In Series? I think not, maybe with some other device in parallel.You can probably use a semiconductor multivibrator, any tunable sci, or cmos depending on what you're trying to achieve.

what is your application ?

=================== Teddy Rubberford (The Man In The Latex Suit)

in article 4227117c snipped-for-privacy@news.tm.net.my, Lock Patrick at nil wrote on 3/3/05

5:32 AM:

What do you mean? What kind of a crystal?

Bill

My application is just to activate a speaker with an impedance of 8 ohm and 0.3W. An ocillatory wave should do the activation.

well, if that's the case;

we use to use 1.5 - 9 vdc cells to test them, you should get a click.

wait a minute, did you ever own a volx vvagon ? a ford pick up?

did i do that for you once ? };-)

don't leave it touch too much, once you've established your purpose.

=AEoy

No. See

and in particular the link from that page because it shows an application close to yours (32 KHz instead of

20 KHz). Most crystal oscillators I have been around (in radios, computers, etc) start at 1 to 2 MHz and go up from there.

You can get a pre-packaged oscillator which contains the crystal and the oscillator circuit. You supply DC power to two pins, and a third pin provides the output. However, these might be hard to find in

20 KHz; most of them start at 32 KHz and go up from there.

You might also ask in sci.electronics.basics .

Matt Roberds

You need to call, or activate over the web

They will ask the freq and date of your purchased, be sure you are not trying to activate a pirated crystal, duh! It usually takes about 2-4 hours to the crystal to receive the signal, but I have been lucky and mine take less than

5 minutes. BTW there are many places to activate these but the web site I have given seems to be the best.