hello everyone...i have a question about connecting a variable resistor or pot...i just built a "emergency" light type circuit with a 555 and 4017...i wanted to add the pot or vary resistor to control the flash rate...the problem is...i cant seem how to properly place it into the design..i did a google search and some people suggested just using two pins..others said all three..im not sure how to hook this up..it has 3 pins..2 at the ends on one side....and it has one in the middle on the other side...thanks for reading..