LED light chaser circuit typically refers to an electronic configuration able to generate or illuminate a group of LEDs in somepredeterminedsequence. One popular IC 4017 is very commonly employed for making this type LED sequencer circuit. The IC basically is a Johnsons 10 stage decade counter/divider and can be used for many interesting light pat
Click here to download the full size of the above Circuit.
tern generations, and may be used for variousdecorativepurposes. We all have probably learned a lot regarding circuits using the above IC for producing chasing light effects, however making the IC create "reverse" "forward" "chasing" pattern with LEDs is something many of us might not be acquainted with. The IC has 10 outputs which generate the sequencing high outputs in the order of the pin outs - 3, 2, 4, 7, 10, 1, 5, 6, 9, 11. The sequencing takes place in response to a frequency applied at pin 14 of the iC Pin 13 is used clock inhibit inhibit and will stall the circuit if connected topositivesupplyterminal, however connecting it to ground makes everything normal, so we connect it to ground. The pin 15 of the IC is connected to the second last pin 9 of the IC, whichmeansthe output resetsevery-timethe sequencing reaches pin 9m, and the moment this pin goes high, the IC repeats the action byresettingthe system. Pin 14 is the clock input and requires to be fed with asquarewave frequency, easy obtainable through any astable oscillator made from ICs like IC 555, IC 4049, transistors etc. Looking at the figure, we see that basically the IC is arranged in its normal sequencing or chasing mode, however the clever introduction of the diodes at the outputs of the IC make thesequencingappear to be reversing and forwarding from start tofinishand vice versa. The diodes just make the outputs of the ICalignin a to and fro manner by...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
characters left: