Tutorials
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Circuit design for the absolute beginner and kids
Introduction Have you ever imagined how a cellphone works, how you will just speak into a cellphone while in your country…
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How to Design and Simulate Astable Multivibrator with 555 Timer IC
In the previous tutorial, we learnt what a 555 timer IC is, how it works and how to use it to…
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What is a 555 timer and how to use a 555 timer IC
The 555 timer IC is a low-cost, very robust and widely used integrated circuit (IC) that can be used to design…
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How to design and simulate dark activated light/ street light
In this tutorial, you will learn how to simulate a dark activated light. A dark activated light is a device that…
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Battery voltage level indicator simulation using LM3914 Dot/Bar graph driver
In this tutorial, you will learn how to simulate voltage level indicator using the LM3914 Dot/Bar graph Driver. The LM3914 is…
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What is a Transistor, types and uses of transistors
Transistors are electronic semiconductor devices that can be used to design electronically controlled switch or signal amplifiers. A transistor controls a…
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How to simulate digital scrolling text display (DMD) in Proteus with MAX7219 and Arduino
I have previously made a project tutorial on how to design a digital scrolling text display with Arduino and P10 DMD…
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How to make password based door lock with Arduino
In the last tutorial, we discussed at length how a 4X4 matrix membrane keypad works with Arduino, how to connect it…
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How to use 4X4 matrix keypad with Arduino
In this Arduino tutorial, I will teach you how to use a 4X4 matrix keypad/membrane keypad with Arduino. This keypad can…
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Resistor colour codes, how to calculate resistor colour codes
You might want to ask what is considered a large value of resistance and what is considered a small value of…