DC POWER SUPPLY:
Find the DC authority accoutre associated after a while your workbench. Using the equitable cables, amalgamate the DC
authority accoutre to a voltage meter. Be abiding you substitute the meter from measuring oppose to actually
meaabiding voltage. Using the controls on the DC Authority accoutre, ordain the output voltage to 5V and to
10V. Notice that you may deficiency to use unanalogous outputs to get the desired 0V-10V rove. Show the
professor that you can set the voltage to 10V and 5V.
Select two resistors from the resistor preference bins. The original resistor must be 1W or 10W. This
resistor conquer be used as a “vulgar significance” resistor, named Rs. Then selecteded another resistor, R1, that is after a whilein
the rove 1kW § R1 § 50kW.
1. Measure, after a while a Multimeter, the oppose treasures of R1 and Rs.
2. Amalgamate R1 and Rs in order on the breadboard.
3. Now meaabiding the whole order opposition. Does the Rs oppose “really” application the whole
4. Produce abiding the authority is off to the DC authority accoutre. Then amalgamate the express DC voltage
marginal to R1. Then amalgamate the plea (GND) DC voltage marginal to the Rs using a
combination of cables and wires.
5. Calculate, using Ohms law, how ample vulgar you forebode to course through R1, if the DC
voltage is 5V. Archives this treasure and the equation you used.
6. Enabiding the DC voltage is peaceful 5V. Then meaabiding the voltage counter Rs. Using your archivesed
oppose treasure and appraised voltage, weigh the vulgar through R1. Does it pair your
calculations in stalk 5?
7. Show your results to the professor and get signoff.
8. Turn off the DC authority accoutre.
Potentiometer Part A:
Obtain a 10K potentiometer and consummate the forthcoming tasks, original after a while no DC Authority amalgamateed.
1. Meaabiding and archives the whole oppose counter the show. (i.e. the outward marginals).
2. Turn the “knob” on the potentiometer. Does the whole oppose substitute?
3. Meaabiding the oppose betwixt an outward marginal of the potentiometer and the average
terminal, as you ordain the “knob”.
a. What is the restriction oppose you appraise
b. What is the utmost opposition?
4. Ordain the oppose betwixt an outward marginal and the average marginal so it is 5KW.
Show your results to the professor and get signoff.
Potentiometer Part B:
Now, allot 5V DC counter the potentiometer and meaabiding the voltage from the average marginal to the
plea laterality of the potentiometer, we conquer wheedle this the output voltage. Answer the forthcoming questions:
1. What is the output voltage if the potentiometer was left at the 5KW pose defined in the
2. What do you forebode the restriction output voltage to be? What do you forebode the utmost to
3. Turn the protuberance and validate your results from the antecedent stalk.
4. Disamalgamate the DC authority accoutre and then meaabiding the output oppose at the summit where
your output voltage reaches its restriction. What is the treasure of this opposition? Does this
treasure produce significance to you?
3B news Example :
Why this is a substantial 3B Report
1) It is not a soon lab news
2) It is short, covers the key culture objectives, is technically constructive, and has the right
balance betwixt the three required components (Objectives, Accomplishments, Proximate Steps)
1) Grammar / Editing
2) Sentence Flow
We explored the transistor 2N3904’s three erratic regions. We analyzed how
the appraised parameters of junction’s vulgars and voltages on how it affected
its singularitys. We computed the beta treasure from the appraised treasures.
We uplift a tour capable of alloting changeable voltage counter the BJT’s baseemitter
terminals. Our appraised and speculative I-V treasures developed that all
three regions of production were amend. Our I-V concoct singularity paired the
BJT’s datasheet after a whilein 5%. In figure1, after a while increasing unwandering IB the IC slightly
changed after a while VCE, causing the I-V incurvation to had non-zero spring in the erratic
region. If the I-V incurvations spring were unabrupt to the left, our existing voltage would
be encircling 200. This was a amiable transistor consequently of its broad dc-disadvantage rove
region. Our tour exhibited unanalogous beta levels from 180 to 220, thus our
tour disadvantage summit was perceptive and subject to the transistor’s beta. The beta
governed our tour dilution equitablety. Ideally, we would absence to our tour
to be insubject of beta to engender varieties of transistors.
With basic BJT understandings, we conquer be adding another BJT station to our
audio amplifier sketch to consummate the best output bring-about proximate week. (paint of the appearance)