Breadboard from scratch, paano basahin yung rows and columns?

[kuya_jerome]

Magandang araw po. Bagong-bago lang ako sa breadboard.

Nakakita ako YouTube na may "+" and "-" rails sa side, tapos middle may "tie points" na connected horizontally. Pero pag tinitingnan ko yung breadboard ko (transparent type, nabili sa kit), parang iba yung layout.

Tanong po:

• Lahat ba ng breadboard pareho yung connections?
• Paano malaman ang continuity without testing one by one?
• May standard color code ba para sa power rails (red=positive, blue=negative)?

Grandson buying me a multimeter for next birthday. Until then, pure visual lang.