Skip to main content

Introduction


Warm greetings everyone. Welcome to my blog. I intend fill this site with discussions on the important concepts in electronics engineering for students, new engineers, and not so new engineers seeking to refresh their knowledge and understanding of the basics of the trade. There will also be practical working circuits, circuit design tips, and more advanced topics for those who are already well initiated in the art of circuit design.

Topics will be varied, mostly those that I find interesting and helpful to many people, students and practicing engineers alike. I like discussing and musing on the basics of things, because from the basics, as I've always heard from people who made  I look up to, comes deep insights by which one is able to appreciate the beauty of nature around us.  So the readers' feedbacks will also be a very valuable source for topics in the future.

This is exciting, and I look forward to many discussions coming here. My goal is to make this site helpful to the readers and create a more intuitive discussion of the topics, rather than the more 'academic' way most of us were used to in school. Although many schools really do a good job of making these engineering topics really interesting to students, I'd like this to be a venue for a more intuitive and practical view of things. Happy reading! And please share your knowledge as well by providing inputs and feedback. The least you can do is to say an article was not very helpful, but this will be a better place and we will be happy if you can say why, or if you're satisfied just say thank you! The articles here are for free and I made them myself!
Labels:

Comments

Post a Comment

Popular posts from this blog

Arduino Transistor DC Motor Control

Arduino boards have PWM (Pulse Width Modulation) outputs that can be used to control like the speed of a DC motor. On a Pro Micro, those outputs are encircled white on the board. You can program it such that it outputs on a scale of 1-255, 1 being the slowest and 255 being the fastest. PWM gives out pulses whose width is varied (modulated) while the period is constant. The longer it is high, the higher power it delivers to the circuit. PWM can be used to drive a transistor (switch) which in turn drives the motor ON and OFF. The longer the switch is ON, the higher the power delivered to the motor, and thus faster. The circuit consists of a transistor Q1 (TIP31) NPN transistor, driven by the PWM from Arduino. The resistor is to limit the current to the base, but enough to operate the transistor in saturation when the input is high. The diode is to protect the motor from any back emf that might come from the motor when the current is cut off. The circuit is supplied by a 9V battery.
2 comments
Read more

What Can You Do With Two Transistors (BJT)? Part 2 - Transistor Regulator

In the first installment of this series, we talked about what exciting things we can do with just two transistors, in particular BJT transistors. Some of us might probably think that we don't talk a lot about BJT transistors nowadays, not with the thrill, excitement, and trend brought about by high advancements in the technology in the Internet of Things, Machine Learning, Machine Intelligence, Advanced Algorithm, etc.. But we argue that these little circuits and components are constantly in the background of the advancements we see around us and we should not ignore them, as much we will not ignore what we currently enjoy and what the future holds for us. Let's continue to look at the Two-Transistor Series Regulator we talked about in Part 1 . The circuit below is a different version, now using the transistor to provide feedback from the output. This makes the output voltage higher. The output is still derived from the zener voltage. The output voltage is now a s
6 comments
Read more

How Does The Howland Current Source Work?

Current source programs an output current as defined by the user, regardless of the load resistance. We know that when load resistance is larger, the voltage across it also increases. An ideal source would maintain a constant amount of current even if the load resistance changes, or in other words even if the output voltage changes. Such behavior describes a very good current source that has high output impedance. Remember, the output voltage changes, but very little or no change in output current. That means high output resistance or impedance. We use the term impedance when dealing with changes. Howland circuit in the figure is a classic current source circuit.   When R 1 is made equal to R 2 , R F equal to R 3,  the output current is given by V IN /R 1 where V IN is V 1 minus V 2 . A simple implementation is grounding V 2 and taking V 1 as the V IN . Figure 1 Basic Howland Current Source This circuit is such a clever manipulation of the op amp, such
Post a Comment
Read more