hello. I,m trying to design a bar graph tachometer for my motorcycle and i need some help on deciding which hardware should i use.
I started this project with a LM 2917 to convert the pulses from the ignition to a voltage reference for the 2 LM3914 LEDs driver, though I had some problems sincroyzing the second IC (think is a resistence value). since the LM2917 is a little expensive on my region, I tryed to replace it with the LM331 as a F to V converter but a friend told me that it would be so much better if I did it using an microcontroller as an arduino so i can change any reference on the programing or add new features in the future. Since this project uses 15 LEDs which will use many digital outputs on the microcontroller, is it worth to relpace the ICs for one microcontroller or would be better to keep the LEDs drivers and use the Microcontroller to replace only the F to V converter?
I started this project with a LM 2917 to convert the pulses from the ignition to a voltage reference for the 2 LM3914 LEDs driver, though I had some problems sincroyzing the second IC (think is a resistence value). since the LM2917 is a little expensive on my region, I tryed to replace it with the LM331 as a F to V converter but a friend told me that it would be so much better if I did it using an microcontroller as an arduino so i can change any reference on the programing or add new features in the future. Since this project uses 15 LEDs which will use many digital outputs on the microcontroller, is it worth to relpace the ICs for one microcontroller or would be better to keep the LEDs drivers and use the Microcontroller to replace only the F to V converter?
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