/members-area/personalblogs/b/blog/posts/questionwhich is better using a 555 timer or a 556 timer to make a pulse width modulator ? -en-USTelligent Community 12https://community.element14.com/members-area/personalblogs/b/blog/posts/questionFri, 19 Dec 2014 23:16:53 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:852a2254-8fa7-46e3-96fe-67c7262356e4clem571<p>The 556 saves one extra gnd and Vcc if you need TWO 555! Otherwise just use 555!</p><p>&nbsp;</p><p>Clem</p><img src="https://community.element14.com/aggbug?PostID=19498&AppID=293&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/members-area/personalblogs/b/blog/posts/questionFri, 19 Dec 2014 12:02:56 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:852a2254-8fa7-46e3-96fe-67c7262356e4gadget.iom1<p>I was under the impression that a 556 was just a package containing two identical 555 circuits?</p><img src="https://community.element14.com/aggbug?PostID=19498&AppID=293&AppType=Weblog&ContentType=0" width="1" height="1">