When you want to light up a large garden path, then a farmhouse entrance, or a remote colony road where electricity bill and AC wiring are out of the question, a high wattage solar system is the ultimate solution. Today we will investigate how to build a robust 40W solar street light featuring automatic night […]
LED
Simple LED Solar Street Light Circuit
We learned how to make automatic street light circuits using a single transistor and an IC 555. But what will you do if there is no AC mains electricity near your village road, then farm house, or outdoor gate? For such places where 220V power is not available, a solar powered automatic street light is […]
Simple Running Dark Dot LED Chaser Circuit Explained
If you search for LED chaser circuits online, almost all of them show one single LED lighting up and moving across a line. That classic effect looks fine but if you flip the logic around, then you get something way more interesting, which is a running dark dot chaser effect. Instead of one glowing light […]
16 LED Reverse/Forward Chaser Circuit
In the following LED chaser circuit concept, I will explain how the circuit sequentially turns on and off 16 LEDs using a 24 pin decoder IC 4514. A four-bit binary input is used by the CMOS 4514 binary-to-decimal decoder, IC3, to go forward and activate each of the 16 outputs. How the Circuit Works The […]
LED Chaser Circuits using IC 74C164 and 74LS164
In this post I will explain two different LED sequencer circuit designs, one using the IC 74C164 and the other using IC 74LS164. Even though both these ICs share the exact same logical function, meaning both are 8-bit Serial-In Parallel-Out (SIPO) shift registers with identical pinout configuration, but yet they belong to completely different integrated […]
LED Chaser Circuit with Slow Adjustable Fading Effect
The next circuit below discusses a cool chasing LED light circuit that features a timed delay fading slow transition effect across the whole illuminated sequencing LEDs. The idea was requested by Mr. Tamam. Technical Specifications I want to design a circuit consisting equal no. of Red, Green, Blue, Yellow, Violet, Orange and White LEDs. I […]