Posts by Fariha Zahid

In this tutorial, we are going to make a 1.2 - 57V Adjustable Stabilized Power Supply Using LM317HVK. This power supply is ideal to use in a…

Most of the time we don’t want certain circuits or electronic devices to turn on immediately, in those scenarios we need a delay circuit to…

In this tutorial, we will demonstrate a circuit of a Negative Voltage Generator using a 555 timer IC. Most of the time we need a negative vo…

Usually, there are power supplies with fixed voltages and we use fixed voltage regulator ICs in their circuits but there are times when a va…

This is a circuit of a Three To Four Months Duration Timer which can be adjusted from a few minutes to several months (up to four months). W…

A Mosquito repellent is important for every household and there are different kinds of them. Mosquito repellants like coils, mats, lotions…

In this tutorial, we are going to make a project of a Push button ON-OFF switch using transistors. These switches are commonly used in proto…

This is a circuit of LM317 Single Push Voltage Selection Power Supply. There are lots of other options available for an adjustable power sup…

In this tutorial, we are going to make a circuit of Long Duration Timer (Max Two Weeks Duration). This circuit is adjustable and can work fo…

In this tutorial, we are going to make one of the simplest projects of a temperature-controlled fan. When there will be changes in the tempe…

This is another project of a power supply. Power supplies are known as convertors of one electrical energy into another. They are responsibl…

In this tutorial, we are making a project of a Super sensitive static electricity detector. After detecting any static electricity around, t…

In this tutorial, we are making an IR Remote tester circuit with an Alarm. There are a lot of devices around us that are controlled through…