Week 3

8th-Semester-Spring-2025/pcb-design/protoboarding/protoboarding.md

@@ -23,6 +23,21 @@ This exercise transitions the breadboarded circuit from the last exercise to a p
 
 The goal of the completed board is to have a common ground pin and individual power pins for each LEDs. This allows for independent control of the LEDs. The components are all to be permanently affixed to the protoboard with solder. In doing so, our prototype will be more durable than a simple breadboard layout.
 
+## Requirements
+1. Traffic light LEDs
+	1. Traffic light shall have three (3) LEDs
+	2. The top LED (furthest from pin header) shall be red
+	3. The middle LED shall be yellow
+	4. The bottom LED (closest to pin header) shall be green
+	5. All LEDs shall have a 220$\Omega$ resistor connected in series to the power connection
+2. Traffic light header
+	1. Header shall be 1 row, 6 positions, male (pins), 90-degree, through-hole mount, 100 mil pitch
+	2. Header shall be extend from the short side of the board
+	3. Pin 0 shall be a common ground pin
+	4. Pin 1 shall supply +5V to the red LED
+	5. Pin 2 shall supply +5V to the yellow LED
+	6. Pin 3 shall supply +5V to the green LED
+
 ## Procedure
 First, we had to modify the protoboard and the pin header for them to mate properly. Since we are using stripboard as opposed to perfboard [@MorePCB], some of the pins would be shorted together through the pre-existing traces. We also had to remove two pins from the pin header, because the pins do not have a corresponding hole on the board.