Results 1 to 3 of 3

Thread: LED to indicate fuel pump pulse

  1. #1
    Silly old bugger.. curmudgeon's Avatar
    Join Date
    Feb 2008

    LED to indicate fuel pump pulse

    This is a bit of an odd one I know. I have a small engine that is fed via a plunger style electric fuel pump, like one of those small Facets. Is there a relatively simple way to set up an LED or indicator lamp to flash on (or off) with each pulse of the pump? It's a sealed unit so I can't just connect it across the internal switch.

  2. #2
    Registered User Euronymous's Avatar
    Join Date
    Feb 2017
    I wonder if the voltage off the negative side of the pump would be oscillating enough (from the plunger coil being switched on and off) that you could use a small amp circuit to boost that oscillation signal and run your LED.
    Last edited by Euronymous; 01-04-18 at 01:38 AM. Reason: Missed a word, because tard.

  3. #3
    Registered Fatman Dark Orange's Avatar
    Join Date
    Jun 2007
    It's probably pretty cheap and simple to do by several methods, (voltage drop across a series resistor, or even simply induced current through a coil of wire around the supply cable) but it'll probably just take a bit of math and some trial and error. What is the resistance of the coil?
    Is it crazy how saying sentences backwards creates backwards sentences saying how crazy it is?

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts