555 IC timer

The 555 IC timer is an integrated circuit. I used an ST (SGS Thompson Microelectronics) NE555 timer IC to build a multivibrator. A multivibrator is a circuit used for two state systems. I built my circuit to control a motor polarity. But it did not work. This is the first time I experimented with a 555 timer. I used a digital circuits reference book and studied multivibrators. I tried building a astable multivibrator. It switches from off to on by itself without any external trigger. Find more about multivibrators in my next post.