My Project Near Completion
I am nearing completion of my project, an engine monitoring system for my light sport aircraft. I have a question that I hope someone can help with. I am using the LM2907 tach chip to develop the RPM input. I have followed the instructions on the data sheet to minimize the output ripple (it is a trade off between response and ripple) I have the ripple quite low, less than 1%. However since the digital display shows the RPM down to 1 rpm increments, the last digit bounces around due to the ripple. Is there a way to read in a min of 10 rpm increments? I am using MDX for the display.
I have attached a couple of pictures of my project. The one picture shows me heating the Exhaust Gas Temp thermocouple in a candle flame. Note the display is indicating 797 degrees. The second shows the hardware ready to slide into my project box. I am using a 25 pin Sub D connector for the inputs and outputs. Comments or questions are welcome.