Introduction equipment the computers of today do not process numbers in the dimm base 10 i. Switch is a very useful and important application of transistors. This is certify that the final project report entitled touch switch submitted summer internship report of the requirement for the degree of diploma, is a work carried out by mahadeb singha, reg no d101169 under my. Automatic on and off light switch simple diy project. Following our study of amplifiers, we turn to the use of the bjt as a switch, a fundamental element of a digital logic circuit. Touch switch project report bipolar junction transistor transistor. In most digital ics transistors will work as a switch to make power consumption very low. This is useful when you want to power a large load using a small physical switch. Both npn and pnp transistors can be used as switches.
As a student of class xii, i did this project as a part of my studies entitled. A transistor is used for switching operation for opening or closing of a circuit. Cutoff suggested reading chapters 27 and 28, basic electronics, grobschultz, twelfth edition fig. Experiment 6 transistors as amplifiers and switches our final topic of the term is an introduction to the transistor as a discrete circuit element. When using the bipolar transistor as a switch they must be either fullyoff or fullyon. During this condition the collector emitter voltage vce will be approximately equal to zero, ie the transistor acts as a short circuit. Transistor as a switch 1 eelectronic devices and circuit active learning assignment. Clap switch a mini project report submitted in the partial fulfillment of degree of bachelor of technology. Transistor switches can be used to switch and control lamps, relays or even motors.
As a switch is used a relay driven by a transistor which is. Working of transistor as a switch npn and pnp transistors. This type solid state switching offers significant reliability and lower cost as compared with conventional relays. Pnp transistors can also be used as switching devices and an example of a pnp transistor switch is shown below. Bipolar junction transistor as a switch iosr journal. Top 10 electronics projects using transistor and mosfet duration. This type solid state switching offers significant reliability and lower. This paper presents the design of a clap activated switch device that will serve well in different phonocontrolled applications, providing inexpensive key and at the same time flee from false. Physics project report on transistor, action of transistor. Transistor switches can be used to switch a low voltage d c device e. I wrote this article because my nephews often ask me, how do you use a transistor as a switch. Transistors that are fully on are said to be in their saturation region.
If the circuit uses the bipolar transistor as a switch, then the biasing of the transistor, either npn or pnp is arranged to operate the transistor at both sides of the. Touch switch project report free download as word doc. Since an integrated circuit is constructed primarily from dozens to even millions of transistors formed from a single, thin silicon crystal, it might be interesting and instructive to. Then to summarise when using a transistor as a switch the following conditions apply. This component is specifically found on the circuit boards or logic circuits of electronic devices. Experiment 6 transistors as amplifiers and switches. Transistors that are fully off are said to be in their cutoff region.283 1196 381 1171 1544 59 1606 74 1338 1027 739 880 578 1091 441 1073 1098 82 1187 1468 1168 1407 1505 590 562 1032 90 945 237 620 992 1203