I've built the following circuit:
From: http://code.google.com/p/multidisplay/wiki/RPM
But it isn't working (output always stays 0V).
And I'm wondering if it's because I've used the 14-pin version instead of the 8-pin version of the lm2907...
Looking at the datasheet (http://www.emesystems.com/pdfs/parts/LM2907.pdf) I assumed that all I had to do to use it in this circuit was combine pin 3 & 4 and pin 11 & 12 of the 14-pin version to get the same 8 pins as the 8-pin version.
Did I overlook something there or is it correct and should I look for a problem elsewhere?
From: http://code.google.com/p/multidisplay/wiki/RPM
But it isn't working (output always stays 0V).
And I'm wondering if it's because I've used the 14-pin version instead of the 8-pin version of the lm2907...
Looking at the datasheet (http://www.emesystems.com/pdfs/parts/LM2907.pdf) I assumed that all I had to do to use it in this circuit was combine pin 3 & 4 and pin 11 & 12 of the 14-pin version to get the same 8 pins as the 8-pin version.
Did I overlook something there or is it correct and should I look for a problem elsewhere?