Lab Assignment #1

Lab Assignment #1

I basically have 4 different systems on my board (PIC 1, PIC 2). The first one is the straight forward single LED with 220 Ohm resistor with 5 V input (PIC 3). The second system is the same but with 2 LEDs (PIC 4) and my alligator clip switch. Yes, the red LED is lit. Apparently red doesn't photograph well. Anyhow, you can tell that the LEDs are not as bright as the first system. The next system has 3 LEDS (PIC 5). They appear to be really dim to not even lit. My last system has the 3 LEDs, but with a slightly higher resistance of 330 Ohms and I circumvent the 5 V Voltage Regulator to get an input voltage of approximately 12 V (PIC 6).

Basically what happens is that the LEDs require about 1.5 V - 1.8 V each to work (that multimeter sure is handy), so in system 3 the voltage is spread really thin that nothing can get enough juice to work. That's the problem with series circuits. As you can see in PIC 7 that 3 of the 4 systems don't have a problem running since they are in parallel and therefore each system gets 5 V or 12 V, respectively.



PIC 1



PIC 2



PIC 3




PIC 4



PIC 5


PIC 6


PIC 7