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This is a very simple digital distance meter, which you can add to your water-level indicator circuit to show water level in a tank, or use it for a school/college project. The author’s prototype is shown in Fig. 1. Circuit...
Presented here is an Internet of Things (IoT)-based temperature monitoring system using IBM Bluemix cloud platform and Mbed NXP LPC1768 development board. Developed by IBM, IBM Bluemix cloud platform supports several programming languages and services as well as integrated DevOps...
This simple GSM security switch project is based on Arduino Nano microcontroller (MCU) and SIM800L GSM modem (Fig. 1). The cellular-based alert system is configured to send an SMS in response to a security switch action. When the security sensor...
LM317T and LM337T ICs are well-known, low-cost adjustable voltage regulators capable of delivering up to 1.5A current output with power dissipation of up to 20W. LM317T produces a positive output voltage, while LM337T produces a negative output voltage. It is...
This project can be used to control up to four industrial electrical appliances with the help of a joystick and an Arduino Nano board. The block diagram of the joystick-controlled industrial automation system is shown in Fig. 1. The circuit...
The purpose of this circuit is to create a new topology with good power factor maintained at AC voltage input, to provide good efficiency output to the battery and to increase its life. Circuit diagram of the dual-voltage rechargeable torch...
Presented here is a motion-sensor-based security system using Cayenne and Arduino Uno. Cayenne is the simplest and easiest platform for the Internet of Things (IoT) systems. It allows you to connect regular boards like Raspberry Pi, Arduino and LoRa,...
This is one of the simplest FM transmitters that can be built. It does not require any tuning, and transmit frequency is crystal locked to 90MHz. It eliminates frequency drift common to LC-based FM transmitters. This design is best...
This project presents a K-type thermocouple-based temperature measurement system using MSP430G2553 microcontroller (MCU). The MCU reads sensor data and updates it on a four-digit, seven-segment display, and also sends it to a smartphone through Bluetooth module. The author’s prototype...
You may already have on hand a 12V AC/DC adaptor or 12V from your PC or 12V battery, but you need a 9V, 2.5A DC power supply for your embedded system. Certainly, you will need a DC-to-DC converter for...