close
close
close
Home Tags Electronics projects

Tag: electronics projects

Presented here is the circuit that drives twenty LEDs in a random manner. LED flashers and sequencers are used in decorative lights to give pretty colour combinations by glowing LEDs in random or sequential manner. This flasher has a...
This low-cost portable spectrum analyser can be used to analyse the frequency content of input signals up to 5kHz. Frequency spectrum of an input signal possesses vital information, and the same has been employed for various applications ranging from...
This simple key-operated gate locking system allows only those persons who know the preset code to open the gate. The code is to be entered from the keypad within the preset time to operate the motor fitted in the...
For beginners, here’s a low-cost multitester that can be used to test the condition of almost all the electronic components from resistors to ICs. It uses only a few components but can also detect polarity, continuity, logic states and...
Described here is an Arduino-based fastest finger first system. In quiz shows, the buzzer or fastest finger first round is frequently used to determine which candidate (or group) achieves the highest priority in attempting the question. The fastest finger...
This project describes an Arduino-based wireless frequency meter designed to measure frequency of sinusoidal AC signals in the range of 50Hz to 3kHz. The authors’ prototypes of the transmitter and receiver sides are shown in Figs 1 and 2,...
This is a simple portable rain and steam detector in one circuit. It is compact in size, runs on 9V battery and is easy to assemble. Circuit and working The circuit diagram of the portable rain and steam detector is shown...
There are many types of robots, from simple toy cars to advanced industrial robots. The Wi-Fi-controlled IoT robot described here uses NodeMCU and Blynk app. It can be controlled wirelessly using any Wi-Fi enabled Android smartphone. The prototype wired...
Here is a simple hi-fi audio stereo power amplifier based on TDA2616 IC. This amplifier works on two 12V batteries or one ±12V AC/DC adaptor. The circuit can deliver 2x12-watt output power for 8-ohm loads with ±16V dual-power supply. Circuit...
A Serial Data debugger is a tool used to test and debug other programs or target programs. This project is based on Atmega16A microcontroller (MCU), and is used to check the correct data received through universal synchronous/asynchronous receiver/transmitter (USART)...