This solar LED light trap circuit for insects can be used to attract insects at night and keep them engaged with the light source. This distraction created by the LED light will keep the insects from flying towards the crops and save the crops from these harmful pests. The circuit design was requested by Mr. […]
Light
Laser Beam Light Activated Remote Control Circuit
The following post illustrates a simple light toggled/operated remote control circuit, which can be activated by an ordinary flashlight or more effectively through a laser beam unit (key chain type). The circuit idea may be understood with the below mentioned points: How the Circuit Functions Transistor T3 along with the associated parts and the LDR […]
Programmable Solar Porch Light Circuit
In this post I have explained a porch light circuit with programmable timer controller which enables the connected LEDs to light up or shut off after some delay, as preferred by the user, thus it’s not entirely dependent on the solar panel parameters. The idea was requested by “Unknown”. Technical Specifications It’d be neat if […]
Light Meter Circuit with LED Bar Graph
In this article I have explained 3 different light meter circuits for measuring power of light. In the first method we will use only a solar cell and a multimeter, in the second method we will use an op amp and a moving coil meter, and in the third method we will see how a […]
Visible Light Communication Circuit [using InfraRed]
You can use this simple visible light communication circuit to send audio and digital information through infrared light, beyond a mile away, with extreme precision. By Sunil Rao The main features of the light communicator circuit can be understood with the following points: Output power = 5 millwatts Frequency Modulation Operation with 50 kHz carrier […]
Cellphone Display Light Triggered Remote Control Circuit
In this post I have explained a cell phone remote control circuit using the light from its display. The idea was requested by Dondon. Technical Specifications I need a circuit similar to the circuit above but I will use the LED of mobile phone as light source so I can turn ON and OFF the […]