D
Darkwood
Best way is to browse google than click on pics... if you specify the type of control circuit it gives a better result.
simple electrical control circuits - Google Search - https://www.google.co.uk/search?q=simple+electrical+control+circuits&rlz=1C1CHWA_enGB594GB594&espv=2&biw=1517&bih=735&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjcq4_Ng_LQAhWmKsAKHeU-CFkQsAQIIQ&dpr=0.9
This way you can look at many and get an idea + learn the symbol lingo too.
simple electrical control circuits - Google Search - https://www.google.co.uk/search?q=simple+electrical+control+circuits&rlz=1C1CHWA_enGB594GB594&espv=2&biw=1517&bih=735&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjcq4_Ng_LQAhWmKsAKHeU-CFkQsAQIIQ&dpr=0.9
This way you can look at many and get an idea + learn the symbol lingo too.