5 beginners projects that work in the first attempt

Just started electronics ? And you don’t know any engineering behind your projects and you are afraid of failure ? Then, this article can help you get started in electronics.

Usually, success in initial projects plays important role in electronics amateurs and engineering students’ career. Many students quit electronics because they fail in their first, second projects. After few failures, student keep a misconception that electronic projects working now might not work later. Thus, I recommend beginners to start with those projects which will work in their first attempt and give inspiration from your own work.

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Audio amplifier using LM386

Description: The LM386 is an audio amplifier designed for use in low voltage consumer applications. The gain is internally set to 20 to keep external part count low, but the addition of an external resistor and capacitor between pins 1 and 8 will increase the gain to any value from 20 to 200.

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Simplest DIY clap switch- Assembly tutorial

If you have come to this page from a search engine, please check this article to know about clap switch. Follow the given steps to assemble the DIY clap switch.

Step 1:Collect all the required components for assembling the kit.

STEP 1

 Step 2: Read and confirm the specifications of the components.

STEP 2

Step 3: Insert all the resistors in its respective place according to its specifications.

sTEP 3

Step 4: Insert the ceramic capacitors into the board according to its labelled  specification.

STEP 4

Step 5: Insert the diode in its respective place.

STEP 5

Step 6: Insert the four transistors in the board.

STEP 6

Step 7: Place electrolytic capacitors according to its specification.

STEP 7

Step 8: Insert mic and LED into its place in the circuit board.

STEP 8

Step 9: Connect 2 pin JST connector in the circuit.

STEP 9

Step 10: Clap switch in action.

STEP 12

Video:

BC-216

100-240V AC Light Bulb Controllable FULLY Assembled Clap Switch

US $13.95
This FULLY ASSEMBLED sound/clap operated switch can be

Experiments with 741- Operational amplifier

Description: This versatile 741 operational amplifier module can be used for making a dark detector using an LDR, a photo transistor and a photo diode. The amplifier has been configured in inverting mode. It compares the change in voltage at pin 2 with the reference voltage at pin 3 and gives output at pin 6 accordingly.  A general calculation and working of similar project has been explained on buildcircuit.com.  CLICK HERE for the project. (more…)

RC module

Description: An RC circuit is used to introduce time delay in circuits. A combination of resistor and capacitor gives a time constant.

The following circuit shows a basic RC circuit. In the figure C1(100uF) works as a storage capacitor. When you press the switch, the capacitor charges quickly and provides base current to the transistor Q1, that results in collector current and that glows the LED D1.. The resistance R2(1K) provides a time constant of around 10seconds. After 10seconds, the base current is not enough for driving the transistor, so the LED also goes off. (more…)

Multivibrator module

Description: A multivibrator has identical components(capacitors, transistors and resistors) arranged on the left and right hand sides that can be used to implement a variety of simple two-state systems such as oscillators, timers and flip-flops. In a multivibrator circuit, increasing the value of the two electrolytic capacitors increases the time each LED remains on/off.  (more…)

Astable mode of 555 timer

Description: Astable mode of 555 timer is used to generate pulses at regular interval. READ ABOUT ASTABLE MODE. 

The following schematic has been taken from buildcircuit.com. The following circuit can work as a music generator, Infrared transmitter and LED blinker depending upon the values of R1, R2 and C1. (more…)

Experiments with LM358

Description: LM358 is also one of the types of operational amplifier. LM358 consists of two independent, high-gain, frequency-compensated operational amplifiers designed to operate from a single supply over a wide range of voltages.

This module can also be used for testing an LDR, a phototransistor and a photodiode. You just need to replace an LDR with phototransistor or photodiode, the circuit simply works. You can try this project using 741 IC also. (more…)

Monostable module

Description: In the monostable mode, the 555 works as a “one-shot” pulse generator.  Other applications of monostable mode include timers, pulse-width modulation (PWM), missing pulse detection,  touch switches, frequency divider, capacitance measurement, bouncefree switches  and so on.  (more…)

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