Injector Circuit Assignment

Injector Circuit Assignment

Component List

Component	Peak Voltage	Max Current Flow	Reverse Voltage	Total Power Disipation	Operating Temp
INJ2: LED Red	2.2V	10mA	5V	180mW	-55 to +100
INJ1: LED Yellow	1.8V	20mA	5V	60mW	-55 to +100
Q1, Q2, Q3: Transistor BC547 x3	45V	Collector: 100mA Base: 200mA	N/A	500mW	-65 to +150

Other Components

• RC1, RC2: 340Ω Resistor
• RB1, RB2: 1000Ω Resistor
• R3, R4: 470Ω Resistor

Calculations Done

These are the calculations I performed to find out the components I needed to make circuit work correctly:

Injector Circuit on Breadboard working with no wires connected

Injectors working simultaneously

Injectors working Sequentially

Reflection

I had a lot of trouble getting my circuit to work. The main problem I had was with getting all the components to work how they are meant to the biggest thing that was incorrect was having my LEDs on the same line with both legs in-line. I corrected this by re-soldiering the LEDs with each leg on its own path. I also had minor problems with getting the current to flow in the correct places I fixed this by breaking the copper paths on the vera board.  After my second attempt to complete the circuit I got it working correctly. 

Lochmaster Circuit

Completed Vera board Circuit