At work, I need to have a good soldering skill. But honestly, I don't have the talent yet, so I need to practice. I asked my manager if I could practice soldering 1 hour a day, and he generously permitted me. For my soldering practice, I want to make something out of it. I want to produce little projects using the used or cheap components that are readily available. As my first project, I designed a logic gate circuit using transistors. The objective of the circuit is so that when I configure the 8-switch DIP switch, the circuit will be modified to a single functioning logic gate between OR, NOR, AND, and NAND gates. The 2-switch DIP switch is the two inputs. The red LED is the output (ON is 1, OFF is 0). The 8-switch DIP switch configuration is as follows: OR gate 00011100 NOR gate 00101110 AND gate 11000001 NAND gate 10100011 I am more comfortable using NPN transistors, but I only had two pieces of them. I needed more, so f...