All the resistors provided to limit the current flow to the base and the collector.įor more details about the latch, visit my blog, link given below, So it is also known as bi-stable circuit. This data signal override the base voltage and the transistors move to next stable state and store the data. The external input data is provided to the base by apply the data signal to it. This feedback system help to store the data in it. It contains two transistors, each transistor base is connected to others collector for get a feedback. The above circuit diagram shows the basic latch circuit. The above video shows the latch which wired on a breadboard. Latch is the basic element in every flip-flop memories. Only store the data until power supply is present. It is a volatile type of memory because its stored data vanishes when power failure occurs. Latch is the basic memory storing element in the digital circuits. So, when rotate the probe then we get a continuous voltage change from GND to Vcc. Now we replace the switch by a potentio-meter (variable resistor). When, we move the switch from one position to other then we get an output like this Vcc, GND, Vcc, GND, Vcc, GND.This is the digital signal. It is because it has some unique advantages like noise immunity, less storage space etc.Ĭonsider a SPDT switch, Its one end connected to Vcc and other to GND. But now a days we analyse, compute, store this data only in digital or discrete form. All the physical measurements are in continuous or analog. That is, it is a continuous one and the digital is discrete one. But in digital we represent the data in all the voltages between the Vcc and GND.

In digital we represent all the data in ones (high voltage level in the circuit or Vcc) and zeros (low voltage in the circuit or GND). Lets start it.ĭigital is nothing, It is only a way for communication. I believe that this experience definitely think you different. So in this instructable I made the basic digital structures like flip-flops using discrete transistors. From this we get that, The digital is only a subdivision or a limited condition of analog electronics world. The storage of digital is simple than the analog. But today we use the digital, it is only because the digital communication is simple and less interference and noisy than the analog. Basically the analog is better than the digital, because when we convert analog signal into digital its resolution decreases. The digital is a limited condition of analog. In reality the digital and analog electronics are same, the digital electronics is only a small portion of analog electronics like electronics in the physics world. So here I made this instructable to aware people which believes that digital is different from analog electronics. But what is a digital ? Is is far away from analog ? I saw many people, which believes that the digital electronics is different from analog electronics and the analog is a waste one. Now we are living in the world of digital.

Transistor circuit