Software user

One of the most versatile linear integrated circuit is 555 timer. 555 timer IC was first introduced in early 1970 by  Signetics Corporation.555 timer IC is incredibly low cost and popular timing IC that is used by electronics student, hobbyist for generating timing delay and pulses. Mono stabale and astable multi vibrators is that the most correct example of its application. With the exception of this it's conjointly used for oscillations, waveform generators, analog frequency meters, voltage regulators, digital  probes, tone generation, frequency divider and lots of others.This device is obtainable as 8-pin mini Dual-in-line package(DIP)  or 14 pin Dual-in-line package(DIP) that consist 25 transistor,16 resistors, 2 diode. PIN CONFIGURATION OF 555 TIMER IC 8-Pin DIP 555 Timer IC Pin 1: Ground    This pin is used to measured the all voltages. Pin 2: Trigger    Negative going pulse is applied to this pin whose dc level is greater than 1/3 times                                VCC. Th

First off, a new adapter for the WiFiChron or HDSP clock . The 8-LED Neopixel stick from adafruit has the perfect dimensions to fit them. Naturally, the time is displayed in color code . The best definitions for the 10 colors I could come up with are these: byte color[10][3] = {   {0,0,0}      /*black*/,   {30,9,0}     /*brown*/,   {100,0,0}    /*red*/,   {128,60,0}   /*orange*/,   {110,120,0}  /*yellow*/,   {0,64,0}     /*green*/,   {0,0,111}    /*blue*/,   {64,0,63}    /*violet*/,   {15,15,15}   /*grey*/,   {127,127,127}/*white*/ }; The clock code is trivial, especially because it's using the great Neopixel library. Below is the most important function: void displayTime() {   byte digit1 = hour/10;   byte digit2 = hour%10;      strip.setPixelColor(0, strip.Color(color[digit1][0], color[digit1][1], color[digit1][2]));   strip.setPixelColor(1, strip.Color(color[digit2][0], color[digit2][1], color[digit2][2]));   digit1 = minute/10;   digit2 = minute%10;   strip.setPixelColor(3, s

Hi friends, you must have seen that facebook gives you different option to control your privacy settings, on your statuses, posts and even on friend list. If a friend has made their friend-list hidden (visibility set to "Only Me") then you can't check their friends, as I've done. But now, a new Free Read more »

A Relay is an electromagnetically operated switch. Relays are used to control a circuit. Many relays consist a coil, a yoke, and an armature. When a current is passed through the coil, a magnetic field is induced in the coil which moves the armature and relay start its switching function. A normal relay has NO(normally open), NC(normally connected), COM and coil pin within it. A Simple one channel relay is shown in below image Relay Required Components For designing a relay driver circuit you will need following components  Relay 1N4007 Diode BC547 Silicon NPN transistor 10K Resistor  Circuit Diagram A simple relay driver circuit is shown in below image. Here we use an NPN BC547 transistor to drive the relay.Base current ought to be a lot of enough to turn on a transistor. A diode 1N4007 use among the circuit to protect the transistor from damage due to back emf. When relay is in off state, COM pin of  Relay Driver Circuit  a relay is connected to NC(normally connected) pin and when a