Llamarama
Member
Hello all, I've started designing a digital dashboard for my car and nearly have it sorted.
I would like a tachometer bar that curves around the speedometer display (Similar to that of a Toyota Supra MA70). Cutting a long story short, I would like 5 LEDs on to represent 1000RPM at 200RPM intervals up to 6 or 7000RPM.
I thought I could use several LM3914s chained up each representing 2000RPM on 10 LEDs each in bar mode. However this appears to not be possible.
The main things I need are bar mode, 200RPM intervals and only easy to use off the shelf components (No fancy LED drivers or microcontrollers please, they scare me.)
Thank you for any help with this.
*EDIT* It's worth noting that I plan to use the LM2917 Frequency to Voltage converter, obtaining 1V per 2000RPM. Hence the need for a bar graph voltmeter.
I would like a tachometer bar that curves around the speedometer display (Similar to that of a Toyota Supra MA70). Cutting a long story short, I would like 5 LEDs on to represent 1000RPM at 200RPM intervals up to 6 or 7000RPM.
I thought I could use several LM3914s chained up each representing 2000RPM on 10 LEDs each in bar mode. However this appears to not be possible.
The main things I need are bar mode, 200RPM intervals and only easy to use off the shelf components (No fancy LED drivers or microcontrollers please, they scare me.)
Thank you for any help with this.
*EDIT* It's worth noting that I plan to use the LM2917 Frequency to Voltage converter, obtaining 1V per 2000RPM. Hence the need for a bar graph voltmeter.
Last edited: