How to?: LED light strip activated by pressure transducer

Thread Starter


Joined Feb 28, 2018
Hello all,
I'd like to start a project where I use a pressure transducer in a car's brake line, to progressively light up a strip of LEDs as the pressure in the line increases. This would create a visual indicator of how much braking pressure was being applied and would be a great teaching tool. I'm sure for some this would be an easy project but I have no experience in this field and really don't know where to even start. Any help or suggestions of starting points would be much appreciated.
Thanks all.


Joined Dec 2, 2013
Yes, use a pressure transmitter and put it into your brake line.
convert output to voltage normally 4-20mA or 0-5 or 0-10V depending on model used.
use a MCU to convert voltage to mcu's pins connect to each pin a led.( use a Fet to control the led.
write a few lines of program.

That's all