Dot Matrix Dashboard

[kirua0304]

Hello everyone..i'm really stuck with this.I'm assigned to do the dot matrix car indicator for electric car.In the dashboard,there is speedometer,battery indicator,ammeter and voltmeter for the motor usage.SO i do need help from anyone who can give me a hand on designing the circuit.

 

[Oznog]

What, like an LCD?
Well, you need a graphics LCD and a microcontroller. You need to learn about ADCs and decide whether you want to have remote digital sending units on like a CANbus or run analog wires into the gauge head.

You need a backlight.

You will need to design a negative voltage supply for the contrast, because the needed contrast voltage varies a LOT with temp so you need to design something to read the temp and adjust the voltage automatically.

 

[kirua0304]

emm..whats components do we need to measure the speed of rotating motor?