Turn Signal Using 555 Timer: 3 Steps - instructables Make the Basic Connections. Place the 555 timer chip in the middle of the breadboard. The notch Wire Up the Turn Signal Circuit. Now to connect the rest of the components for the turn signal. Wire the Power and Switch. Wire the black wire of the 9 volt adapter to the negative power rail on Car Turn Signal Flasher Circuit with Lamp Malfunction Jun 17, 2019IC 555 based car turn signal indicator with pilot warning lamp: The IC 555 section is wired in the normal astable multivibrator whose pulse rate at pin## can be adjusted with the help of the given 100K pot. The two NPN transistors function as current sensor, and IC 555 reset controller. When power is switched ON,..