Explore how to create a timer-based automatic light circuit using the versatile NE555 IC in monostable mode. This step-by-step DIY electronics project includes components, wiring instructions, and precautions. How to Use it Last Updated on April 19, 2025 by Swagatam 11 Comments So this 35238-MP Multi-Function Timer module is an digital adjustable programmable timer which we can use it for doing time-based automation things. Inside it, there is a microprocessor that watches time very closely and makes the. Arduino Laser-based Timing System: As part of my teaching, I needed a system to accurately measure how quickly a model vehicle travelled 10 meters. Initially, I thought I would buy a cheap ready-made system from eBay or Aliexpress, these systems are commonly known as light gates, pho. In this project we will see how to build a programmable countdown timer in the range of 1s – 9999s which can be used in domestic or industrial applications as well as by beginners to learn how to assemble an electronic module and load a program. During the selected time interval, the system can. I have 4. In the finish line, you will have an Arduino UNO, nRF24L01+ Transceiver, LED button pad, photoresistors, LEDs, plastic enclosure, and tripod together with my Finish Line PCB. This module acts as the master, from the LED. There are three different modes in which IC operates: Astable (produces oscillation without triggering), Monostable (also known as timer circuit), and Bistable (requires triggering to change the state).