Building a FRED Photopopper circuit

For the past year and a half, a group based in Ann Arbor, Michigan, named GO-Tech has been formed, uniting individuals interested in creating projects using technology, such as hardware, software, metal, and wood. This initiative is referred to as...

Light-Controlled Pond Pump

This circuit was designed to automatically control a garden pond pump, turning it on at dawn and off at dusk. This automation eliminates the need for manual operation, particularly beneficial during holidays when the owners are away. The controller derives...

Automatic Night Lamp with Morning Alarm

This circuit automatically activates a night lamp when the bedroom light is turned off. The lamp stays illuminated until the light sensor detects daylight in the morning. A super-bright white LED is utilized as the night lamp, providing bright and...

robot circuits

For a robot to perform its assigned tasks, a controller is necessary. This controller may be mechanical, electrical, electronic, or a combination of these. It acts as the brain of the entire system, providing the robot with its intelligence. The...

Light Sensor Circuits

Dark Activated Switch or Porch Light Switch. This circuit activates a relay when the light level drops below a preset threshold. The light sensitivity can be adjusted using variable resistor VR1, and the relay contacts can control an external light...

Digital Light Sensor

The Intersil ISL29001 is a digital light sensor designed to measure light intensity and easily interface with a microcontroller. The Intersil ISL29001 is a highly integrated digital light sensor that operates using a photodiode and an analog-to-digital converter (ADC) to provide...

Homemade Metal Detector Kit

A simple home project can quickly become problematic if it encounters electric cables, gas, or water pipes, or the central heating system. Using a metal detector allows one to check for metal objects within walls, ceilings, or floors beforehand. An...

Homemade Robots polymax improvements

The 2009 Robot Rally highlighted the flaws resulting from a rapid three-week engineering and building project. Time-saving shortcuts in both code and hardware led to multiple failures, including edge detectors, beacon trackers, and line follower reversals. Investigations were conducted into...

light sensor circuit

This is a sensor circuit designed for light detection. It utilizes the LM311 comparator and features a simple design. The comparator is powered by a 12 V DC supply and does not require a negative supply for efficient operation. Feedback...