At 09:32 PM 5/28/2011, Rocket J Squirrel wrote: >Yeah but what does it use for a frequency reference? Never taken one apart to see. Could be a self-contained crystal oscillator with a frequency divider or a multivibrator or an r-c oscillator with a ceramic resonator and freq. divider. I'd give some odds it's a 555 timer though, it's low frequency and not critical. OTOH they use a 4 MHz crystal in the dash clock instead of 32768 Hz (which is why it's accurate to better than five seconds a month); so maybe they got anal with the idle stab as well. Yrs, d |
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