發送短信 : A current-balancing circuit for multiple light-emitting-diode (LED) strings

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