Controlling Servos

Current radio-control servos are very compact, bearing in mind they contain not only their own mechanism, but also dedicated drive electronics, which only need simple TTL or CMOS logic signals as an input. The power they are able to supply can be quite considerable, for the most powerful of them (originally intended for ‘large’ model planes or boats); and lastly, they are usually supplied with a host of accessories such as crank arms, perforated wheels, etc., making it easier to interface them with the elements to be operated.