In this post we are going to construct wireless office calling bell which can be used for calling 6 different personnel from head’s / boss’s desk or some other calling […]
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Understanding Pull-Up and Pull-Down Resistors with Diagrams and Formulas
In this post we are going to explore pull-Up resistor and pull-down resistor, why they are commonly used in electronic circuits, what happens to electronic circuits without Pull-Up or Pull-down […]
3D Moon-Sphere LED Driver with Charger and Dimmer Circuit
In this post we learn how to build a homemade LED driver with dimmer and charger circuit for illuminating a 3D moon from a 5V USB source. The idea was […]
3 Best Transformerless Inverter Circuits
As the name suggests, an inverter circuit that converts a DC input into AC without depending on an inductor or a transformer is called a transformerless inverter. Since an inductor […]
200, 600 LED String Circuit on Mains 220V
The post details the construction of a 200 to 600 LED project, using series parallel LEDs for creating an alphabetical display sign board. The idea was requested by Mr. Mubarak […]
27 MHz Transmitter Circuit – 10 Km Range
The 10 km range, 27 MHz transmitter circuit explained here uses citizen’s band which consists of 2 main types of users: radio control (R/C) modellists and users of low-power FM […]