Please help with Oscilater

G

ghoattriple

New Member

• Nov 3, 2004

• #1

I dont understand how to put a crystal into a circuit.could someone please help me.Something small like a 2 transistor oscilater timed bye a crystal. needs to output 2 volts if possable if not then just help me understand how this is dun...ive tried everthing???

 

G

ghoattriple

New Member

• Nov 3, 2004

• #2

ok

i am using this for a clock signal.or buad rate

 

S

StupidDum

New Member

• Nov 3, 2004

• #3

I suppose all u need is a oscillator?
Well, just use 555 timer will do.

 

R

Russlk

New Member

• Nov 3, 2004

• #4

What frequency is the crystal? I have tried to make 32768 hz crystals oscillate with no sucess, so I use higher frequency and divide down.

 

G

ghoattriple

New Member

• Nov 3, 2004

• #5

ok

This oscilater is for sending data to a smartcard and has to be acurate.perfect timing..doesent matter what crystal but around 9600 of bits i may be wrong.but i have the crystals needed i just dont no how to hook them up ill be building the whole circuit...How to do this???

 

R

Russlk

New Member

• Nov 4, 2004

• #6

What is the crystal frequency, is it series or parallel resonant, and if parallel, what is the shunt capacitance? What frequency do you want at the oscillator output? The circuit below is a typical parallel resonant crystal oscillator. The value for C is double the specified shunt capacitance.

 

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