View Single Post
Old 09-02-2014, 02:18 PM   #4 (permalink)
Occasionally6
Master EcoModder
 
Join Date: Apr 2013
Location: World
Posts: 385
Thanks: 82
Thanked 82 Times in 67 Posts
Yep. The circuit for the TPS LED bar graph (other thread) will also work with a 0-5V MAP sensor. The upper and lower voltage limits are different for both idle and WOT but that's it. GM sensors - at least - are not quite linear voltage vs MAP but pretty close. I intended to post to that effect in the TPS thread but wanted to try it myself first.

If you want more than 10 LEDs, the second part of the circuit, after the filtering and signal voltage divider, can be duplicated with the upper and lower limits for each LM3917 adjusted to suit the voltage ranges over which they need to be lit.
  Reply With Quote