Circuit 1

My first circuit was a simple circuit containing transistors to switch an LED circuit on.

After given our circuit diagrams, our first task was to calculate the correct components to use in order to make the circuit function correctly.
We had 1x12v supply and 1x5v supply.
We used 2x npn type c547 transistors for switching our circuit.
We used 2x1k resistors, one each for our two base circuits. These were to control the 5v supply to switch the circuit on. If not correct, these would either have made the light not turn on correctly, or would have had too much voltage for the transistor to handle and destroyed it.
We used 2x560ohm resistors, one each for our two load circuits. If these weren't correct, we may have had too much current flowing through the circuit, resulting in an open circuit in either the LED or the transistor, dependent on the maximum specification of each component.
We used two 5mm LEDs, one of which was a high intensity bulb, which I would find out after powering the ciruits up. I found that the high intensity bulb, instead of having the normal 1.7-1.8v drop, it had over 3v drop across it. This may have been dangerous to the functionality of the circuit, but after testing, and leaving the circuit turned on for a considerable length of time, i found that the circuit would function correctly still with the different bulb without an early breakdown.
After finding the required components for the circuit, we then mapped out a circuit on LochMaster, a computer program designed for mocking up circuits.
Once the circuit was planned, we acquired all of our components and began to build our circuits. Once they were built, we powered them up and tested them. My results were as followed.

My circuit was faulty, so i checked my soldering
I found that i had placed one of the LED pins in the wrong place, connecting it straight to the other of the two LED circuits
Once that was repaired, I tested once again and circuit functioned correctly
My voltage drops were as follows

Vd@LED1=3.09v
Vd@LED2=2.2v
Vd@R14=9.14v
Vd@R15=10.01v
Vd@R13=4.6v
Vd@R16=4.6v
Vce@T1=45.5mV
Vce@T2=44.6mV
Vbe@T1=.77v
Vbe@T2=.82v

These voltage drops were desirable in the sense that they fell between specification for each component.