Electronics projects

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BUILDING THE ELECTRONIC PROJECTS
The information given here is meant for to understand the function of various electronics components and basic principal and procedure to understand the electronic circuits.
Electronic components are represented by symbols with the help of these symbols an electronic circuit can be read.
Trouble shooting
Step 1
Use proper voltage batteries for the project. Check them with the meter for the proper voltage. In case they are weak then project will not work
Step 2
Check all the wiring connections to make sure that all the electronic component are placed properly and their terminals are jointed as per circuit diagram.
Build your project on your own way
While building your project in your experimental lab think about the aim of the project and try to do some experiment with the project. For

Mini electronic harmonium




This project is a small and cheap harmonium circuit. Real harmonium is big in size and costly. This project gives the same pleasure as that of real harmonium. Children feel happy playing this harmonium.
This electronic harmonium circuit is a audio oscillator. It creates some musical notes. Different types of notes are produced by increasing the number of resistance and changing the value of condenser. To create high frequency tunes the value of R7 or R8 is changed. It gives good result. Probe in the circuit is touched alternately to the open end of resistances to get different type of loads. By touching with probe the base of transistor BC548 gets the forward bias. The transistor starts conducting and musical notes are given out by the speaker. Base transistor BC548 is given feed back through the condenser 0.01mfd. This small circuit gives lot of entertainment by touching the points A,B,C,D,E,F &G with probe one by one and good practice gives good tunes from the project.   







 
R1 = R2 = 47K
R3 = 6.8K
R4 = 300K
R5 = 1.8K
R6 = 1.2K
R7 = 270
R8 = 5.6K
R9 = 560
R10 = 2.2K
P1 = P2 = P3 = P8 = 5K
P4 = P5 = P6 = P7 = 1K
C1 = 2µF/25V
C2 = C3 = 1µF/25V
C4 = 0.27µF
C5 = 4.7µF/25V
T1 = T2 = T3 = 2SC3622, 2SC3245, 2SC3248