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Last Updated on: Thursday, April 07, 2016 02:04 PM

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More  Crystal Oscillator Circuits
 

40Khz LED Test Signal Generator  -  This 40KHz crystal controlled oscillator circuit drives an infrared LED with powerful 40ma pulses.  The circuit can be used to test optical communications circuits, designed to receive 40KHz modulated light signals . . . [Circuit by David Johnson P.E.,  02/14/02]


Crystal Controlled 1KHz Signal Generator  -  A while back I got an email from a Discover Circuits visitor.  He needed a way to calibrate a RPM display for a big diesel engine.  The engine had a tachometer output which produced 12 pulses per rotation with an Amplitude of about 5v RMS.  The full scale reading on the engine’s RPM speed display dial was 5,000 . . . [Circuit by David Johnson P.E.,  05/01/12]

Gated Crystal Oscillator with Very Low Power  -  The circuit gates the output of a continuously operating 32KHz crystal oscillator to the input of a C-MOS buffer when clock pulses are needed. The technique gets around the problem of a slow starting crystal oscillator by keeping the oscillator going and switching on a transistor power stage only as needed . . . [Hobby Circuit designed by David A. Johnson P.E.,  06/03/00]


LED Test Signal Generator-40Khz  -  This 40KHz crystal controlled oscillator circuit drives an infrared LED with powerful 40ma pulses.  The circuit can be used to test optical communications circuits, designed to receive 40KHz modulated light signals . . . [Hobby Circuit designed by David A. Johnson P.E.,  02/14/02]


Ultra Low Power 32Khz Crystal Oscillator  -  I have used this circuit many times when I needed a low frequency reference, which did not draw much power.  With the components show, the current from a 3v battery is less than 1.2 microamps . . . [Hobby Circuit designed by David Johnson P.E.,  12/18/04]


Very Low Power Gated Crystal Oscillator  -  The circuit gates the output of a continuously operating 32KHz crystal oscillator to the input of a C-MOS buffer when clock pulses are needed. The technique gets around the problem of a slow starting crystal oscillator by keeping the oscillator going and switching on a transistor power stage only as needed . . . [Circuit by David A. Johnson P.E.,  06/03/00]

 

More  Crystal Oscillator Circuits

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Master Category List - Dave's Circuits

 


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