LedDrivers

http://www.eldoled.com/?e=opj5i85--84xEm1LvOKf3esqGie5qarkyFmdu82L0QPsu6VefmaOYH7tsuqJF4b6

http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2243/t/do max 3966 - 155meg led driver

http://www.ledsmagazine.com/Signals

http://www.maxim-ic.com/appnotes.cfm/an_pk/828

https://www.jotrin.com/technology/details/the-ultimate-guide-to-cd4017-decade-counter-datasheet-application

linear actuators motion
http://www.haydonkerk.com/Products/StepperMotorLinearActuators/CanStackLinearActuators/tabid/85/Default.aspx#threaded