Circuit Splash

IC CD4017 is a CMOS decade counter IC. It can produce output at the 10 pins sequentially, i.e. it produce output one by one at the 10 output pins. Explore below some interesting electronic circuits based on IC CD4017.

The basic circuit operates at a frequency determined by R1, R2 and C1 and has a pulse width range of 0 to 100 percent.

The following diagram shows a basic circuit with an open collector output that would require a pull up resistor at its output. The parts values are the nominal values of the components used.

UPS is a system which converts DC to AC. So, UPS takes DC power of battery as input and gives AC power as output. Today we are going to build a 100 watt 12v DC to 220v AC inverter. This Circuit is simple and very useful.

An RC Phase Shift Oscillator is an electronic oscillator circuit which produces a sine wave output. It can either be designed by using a transistor or by using an Op-amp as an inverting amplifier.

This is done by connecting the OUTPUT of each timer to the TRIGGER of the other through a diode and placing a resistor in the trigger circuit. The resistor limits the current from the opposite timers output when the trigger is closed on the stopped timer.

As the name suggest 555 timer is basically a “Timer”, which create a oscillating pulse. Means for some time output pin 3 is HIGH and for some time it remains LOW, that will create a oscillating output.

The Schmitt-trigger is a circuit which creates hystereses and which is useful in digitizing an analog signal into a digital signal of either high or low. The hystereses makes inputs more immune to noise. The input must surpass a low threshold voltage before the output goes low, and likewise the input must exceed a high level threshold before the output goes high.

The integrator does just what the name implies. It integrates - in the calculus sense - the input signal to produce the output signal. There is a scaling factor and a minus sign again, but that's pretty much what happens.

The DHT11 is chosen because it is lab calibrated, accurate and stable and its signal output is digital. Most important of all, it is relatively inexpensive for the given performance. Below is the pinout of the sensor.