Voltz
New Member
First of all, thank you all for your past help, you've really eased me into electronics, Think I've realised now though is that there are always several ways to do anyone thing in electronics, I want to make an LED based circuit out of a Bipolar LED (Red/Green) but it should do RED/YELLOW/GREEN if green and red are activated at the same time, so here's what I want to do, because the Circuit is powered by a 9V battery I want it to show green for >8.8V, yellow for >=8 and red for 8< , I was thinking either a zener diode with the correct breakdown voltage? or maybe an opamp and if one of those which one? Anyone got any ideas?