The article automatic street light circuit diagram is self-sensing fully automatic night lamp designed to work with AC. Unlike other circuit it does not require DC thus no rectifier and bulky capacitor and as a result making cost will be cheap. One can use this circuit with street light, dome lamp, parking light etc. this simple circuit switch on the light at night and off automatically at day time. Description of Automatic Street Light Circuit Diagram This simple project is built around four common available components i.e. resistor, LDR, SCR…
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How to Make Relay Switch Circuit
In this tutorial, you will learn how to make your relay switch circuit for Arduino in a few easy steps. We often see many electronics hobbyists especially Arduino users buy expensive relay modules instead of building their own. The general price of the relay module found in the market is about $2 but you can make your own for less than $0.70. In the tutorial Relay Switch circuit for Arduino, you will learn Relay and Operating principle Pin Identification of Relay Component value calculation and choosing the best for your…
Read MoreBattery Level Indicator
The circuit ‘Battery Level Indicator’ is simple, cheap, and compact. It can be used in emergency lights and other power supply circuits. We are using this simple circuit ‘battery level indicator’ for over a year and has found it works well in emergency light as well as battery charger circuit. We already indicate various battery voltage states using IC, this time we come with a little different concept and circuit for battery indication. Other battery level circuits posted in bestengineeringprojects.com Battery Status indicator Circuit 10 Level Battery Charge Indicator Circuit…
Read MoreTouch Switch Circuit using Transistor
Today, I have come up with another simple but very applicable project ‘Touch Switch Circuit using Transistor’. With this simple project, you can modify your existing electrical/ electronic appliance with a modern touch facility. A few days earlier I bought a reading lamp from one of the Chinese stores, the design of the Chinese product is quite impressive. The thing that motivates me to write this post is touch facilities i.e. you can on and off the lamp by simply touching the touch plate. The circuit posted here used two…
Read MoreDIY Li-Fi Speaker | How to Design
Here in the article I am going to show you “How to design DIY Li-Fi speaker” we are going to show you how to make Li-Fi speaker i.e. uses light to transfer data. This article consist of entire detail like design procedure, circuit diagram, and description. Introduction to Li-Fi (Light Fidelity) The term wireless has been gaining so much popularity in the recent years. Li-Fi is another block to growing platform. The term Li-Fi; Light Fidelity sounds somehow similar to Wi-Fi and they share a lot of common features. Both…
Read MoreOpto Reflective Sensor using 555
The DIY project posted here is of Opto Reflective Sensor using 555 IC and TCRT5000 module. These sensors are photoelectric sensors, which signifies that they rely on photo or light and do not need to be in contact with any other objects to sense. When a beam of light between the reflector and light sensor is interfered, that is when the sensor sends electrical signals. These electrical alerts are the information to the output unit. These days opto reflective sensor is used in various projects like proximity sensing, position detector,…
Read More12V DC Ballast Circuit
The project “12V DC Ballast” using power transistor 2N3055 is used to glow AC tube light using DC source. The circuit of DC ballast is basically a DC to AC converter. DC ballast of various capacities (in watts) is already available in markets. The circuit posted here is of 20W capacity i.e. (it can drive a load up to 20 watts). Previously, we had posted Electronic Blast for Tube-light which drives load up to 40W, double the power of 12V DC Blast. Circuit Description of 12V DC Ballast The circuit of…
Read MoreAutomatic Night Lamp Circuit
The project “Automatic Night Lamp Circuit” is very simple and built around four major components i.e. TRIAC, SCR, LDR, and Resistor. The lamp used in this project is a porch light that would turn on automatically in dark (nighttime) and turn off in light (daytime). Circuit Description of Automatic Night Lamp Circuit The circuit of Automatic Night Lamp Circuit is used shown in figure 1. The circuit is very simple and straightforward that anyone has very little knowledge about TRIAC and SCR. Silicon Controlled Rectifier | Automatic Night Lamp SCR…
Read MoreSimple Battery Changeover Relay
It is economical to use a battery eliminator but with frequent power failure in most developing countries, it becomes annoying to change over from battery eliminator to battery operation every time the electric supply fails. Thus, we had designed a simple battery changeover relay. A simple way to avoid the nuisance is by connecting the battery and power pack in parallel. But the advantage with such a system is that when the eliminator voltage falls, even slightly (say from 6V to 5V), though the performance of the set remains unaffected,…
Read MoreSimple Signal Injector Circuit
Here is a project of a Simple Signal Injector Circuit. Don’t think it’s just “another one”; see the advantages it offers over some other injectors: Commercial injectors working on 1.5V are rather large in size to be carried in a shirt pocket. You can carry this injector quite easily in a shirt pocket because the whole device can be assembled in a pencil cell holder. This circuit will give you a battery life of about two a single pencil cell. Most important of all, this injector will cost you at…
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