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E72 : Electronic Circuit Applications
in partnership with mas chano
fall 2005 - lynne molter
Lab 1: Introduction to Op-Amps «
In this lab we observed op amps, one of the basic building blocks of analog electronics. We built and tested circuits with inverting amplifiers, non-inverting amplifiers, integrators, comparators, Schmitt trigger and the relaxation oscillator. We also simulated some of the circuits using MultiSim.

E 72. Electronic Circuit Applications

This course focuses on the fundamentals of electronic circuit design starting with a brief survey of semiconductor devices including diodes and bipolar and field effect transistors. The course continues with op-amp applications, including instrumentation and filter design. The use of digital logic is also explored. Throughout the course, practical considerations of circuit design and construction are covered.

Lab 2: Diodes, Transformers and all that «
In this lab we were introduced to an extremely common non-linear device, the diode, and some of its more common uses. We learned a little bit about transformers, a component that is in almost every piece of electronic equipment that we own.
Lab 3: Bipolar Transistors «
In this lab, we primarily focused on the operation of bipolar junction transistors.  We looked at the common emitter amplifier and starting from basic versions, we built more efficient circuits.  We also looked at voltage regulators and improved regulators from our previous labs using transistors. Finally we looked at a pumped op-amp and made slight modifications to improve performance.
Lab 4: Digital Electronics « analog to digital conversion
In this lab we created a simple digital circuit using logic gates and comparators. Given a signal (Vsig) that varies between 0V and 5V, we designed the circuitry that outputs
00 if Vsig< 1V;        01 if 1 ≤ Vsig < 2V;        10 if 2 ≤ Vsig < 3V;        11 if 3 ≤ Vsig.
Lab 5:up/down counter «
For this lab we implemented a counter that takes as input a certain voltage and depending on the voltage counts up and down.  At a critical voltage, the counter will count in place (one up one down).
Lab 6: Switched Capacitor Circuits :: Filters «
For this lab we used a special type of filter called the switched capacitor filter that allows for very sophisticated analog circuits to be manufactured without using resistors.  Using the switched filter capacitor we implemented the low pass, band pass and high pass filters.
Lab 7: Solar Seeker «
In this lab we created a solar seeker: a curcuit that turns its head towards the light. The circuit included a pair of photocells and a small servo motor to turn the head of the seeker.  We implemented the control mechanism using the photocells as input and the small servo as output.
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