Contribute cover: Circuit Designer R.D.

  _____     _____               ______  
 /  ___||  |  ___||   ____     /_   _// 
| // __    | ||__    |    \\    -| ||-  
| \\_\ ||  | ||__    | [] ||    _| ||_  
 \____//   |_____||  |  __//   /_____// 
  `---`    `-----`   |_|`-`    `-----`  
                     `-`