power supply
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Power Bank Circuit on PCB The features of the digital products are growing enormously which triggers the frequent usage of smart phones in several applications. Thus the battery backup time is getting decreased. It will be fun to build a Power Bank for Mobile Phone as spare charging source for emergency purpose which is also portable. Previously we have made… |
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How to Make a Mini Tesla Coil with 9v Battery Be it an ordinary high school project or a mind-blowing arcing project, a Tesla Coil is always fun to build and will definitely make your project look cool and attractive. A Tesla Coil is a simple coil that creates a high voltage electric field in the air when a small input power (9V) is provided, this electric field is strong enough to glow small light bulbs. This… |
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Generate Pulse Width Modulation (PWM) Signal using 555 Timer IC Pulse Width Modulation using 555 timer is an important feature of today’s microcontroller due to its requirement for controlling many devices in almost every field of Electronics. PWM is widely used for motor control, lighting control, etc. Sometimes we do not use a microcontroller in our applications, and if we need to generate PWM without a microcontroller, then we prefer… |
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Simple Smoke Detector Alarm Circuit Smoke Detectors are very useful in detecting smoke or fire in buildings, and so are important safety parameters. In this project, we are going to build a Simple Smoke Detector Circuit without using any Microcontroller. This circuit triggers the Buzzer whenever it detects Smoke or fire nearby. This circuit mainly uses the MQ6 Smoke/Gas sensor to… |
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Transformerless Power Supply Generating low-voltage DC from the 220V or 110V AC mains is very useful and necessary in the field of electronics. Low voltage DC, like 5v, 6v, 9v, 12v, is used in electronics circuits, LED bulbs, toys and many household electronics items. Generally, batteries are used to power them, but they need to be replaced from time to time, which is not cost-effective and also takes… |
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Automatic Door Opener using Arduino You must have seen automatic door openers in shopping malls and other commercial buildings. They open the door when someone comes near the entrance and close it after some time. A number of technologies are available to make such kinds of systems, like PIR sensors, Radar sensors, Laser sensors, Infrared sensors, etc. In this Arduino based automatic door… |
