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300 in One Electronic Project Lab: Missing manual
by Kashif Javaid In 1995, as a junior in high school, I asked my parents to buy me this electronics kit for my birthday. I had always loved electronics and was eager to build cool circuits. So naturally, I wanted … Continue reading
Posted in 5 Hi-Tech Silicon Valley Tour
Tagged diy, electronics, science, technology
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What is Capacitor and Inductor Duality? Proved using LTspice.
Command covered: PWL .IC .tran Capacitor stores energy in the form of an electric field. The energy is stored between its plates due to the separation of charge. Inductor stores energy in the form of a magnetic field. The energy is … Continue reading
Posted in 5 Hi-Tech Silicon Valley Tour
Tagged capacitors, duality, electronics, filters, inductor, rc-circuits, rc-network, rl-network
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LTspice Lesson 6: How to do Thermal Simulations in LTspice?
by Kashif Javaid Blocks Covered: All electronics components generate heat. One of the system designers job is to figure out how to get rid of this heat efficiency and cheaply either designing an active or passive or both active and … Continue reading
Variable Voltage Reference for any electronic lab
Background and inspiration for this project came from Jim Teixeira article published in Nuts Volt magazine, https://www.nutsvolts.com/magazine/article/build-a-variable-voltage-reference Here is my attempt to build this tool along with some performance measurements. The main difference is that I have added the power LED … Continue reading
LTspice Lesson 5: How to simulate impedances?
Commands covered: .ac .meas What is impedance? Impedance is simply defined as voltage divided by current (Z = V/I). This definition of impedance applies to both in the time domain or the frequency domain. In the frequency domain it’s really … Continue reading
Posted in LTspice for EE students
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LTspice Lesson 4e: Generate Waveforms used in Electric Circuits: EXPonential
LTspice provide a built in exponential waveform generator. This can be very helpful to generate arbitrary exponential pulses to simulate special systems such as surge protector or ESD modeling. In this lesson, we will understand all the parameters that are … Continue reading
Posted in LTspice for EE students
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Tour du Mont Blanc 2019
A travelogue by Faraz Faheem Tour du Mont Blanc Day 1: The Union (London -> Geneva -> Chamonix) After witnessing Pakistan beat South Africa at Lords Cricket Stadium and a sumptuous buffet at Royal Nawab the previous night, the London … Continue reading
LTspice Lesson 4d: Generate Waveforms used in Electric Circuits: PWL FILE
LTspice Lesson 4c discussed creating a waveform using a handful of discrete points, but by using PWL FILE as shown below, large number of points can be easily imported into LTspice simulator to generate more sophisticated waveforms. In this lesson, we … Continue reading
LTspice Lesson 4c: Generate Waveforms used in Electric Circuits: PWL
by Kashif Javaid Piece-wise linear voltage or current source is very interesting and can be used to create arbitrary waveforms. Basically you define points (tx, vx) to draw out the precise waveform. For times before t1, the voltage is v1. For … Continue reading
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LTspice Lesson 4b: Generate Waveforms used in Electric Circuits: PULSE
LTspice has various options to generate a custom pulse for circuit simulations. Generating a pulse is done through an independence voltage or current source as shown below: Pulse minimum voltage, maximum voltage, delay before the pulse start, rise time and … Continue reading
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