# Simple Electronic Circuits that are Helpful for the Beginners

In general, the success in the early projects usually plays an important role in our electronics field for careers of engineering students. A good number of students usually dissociate from electronics after failing for the first time.

After some failures, this student will have the wrong notion that the projects that work today may fail to work tomorrow. Therefore, what we suggest is that the beginners begin with some projects that will give then the output in their first attempt and then give some motivation for your personal work.

Also, before you go ahead, there is a need to have some understanding regarding the usage and working of the breadboard. In this article, we will explain to you what simple electronics are. We will then go ahead to discuss the best electronic circuits that will be very helpful for the beginners.

## What are Simple Electronic Circuits?

Simple electronic circuits involve connecting different electronic and electrical components making use of connecting wires by soldering on the PCB or on the breadboard to create circuits seen as electronic and electrical circuits. For the purpose of the article, let’s take a look at some simple projects for the beginners that are created using simple electronic circuits.

### Simple Electronics Circuits to Help Beginners

The list we will be discussing below will offer lots of helpful benefits for beginners. Also, they will help in the practice, circuits design, and also helps in dealing with the complex circuits.

#### DC Lighting Simple Electronic Circuits

The DC supply plays a very important role for the small LED having two terminals called cathode and anode. This anode is the positive end, while the cathode is called the negative end. In addition, the lamp serves as the load having two terminals like the negative and positive ends.

Furthermore, the lamp’s positive terminals are usually connected onto the battery’s anode terminal. On the other hand, the lamp’s negative terminal is connected onto the battery’s negative terminal too.

Also, you’ll connect a switch in-between the wires to ensure that the DC voltage is supplied to your led bulb

#### Rain Alarm Circuit

This is another example of simple electronic circuits that alerts you anytime it will rain. The rain alarm circuit is useful in homes in guarding washed clothes. These include other items vulnerable to the rain anytime they stay home most times for their job. The components needed for the building of this circuit are referred to as probes.

When the rainwater touches the probe, there is a flow of current through that circuit to help in enabling the Q1 transistor. Also, the Q1 transistor ensures that the Q2 transistor now becomes active. Therefore this Q2 transistor helps in conducting, and the current flow via the speaker helps in generating a specific buzzer sound. Till the probe touches water, the procedure goes over again. This oscillation circuit changes the tone’s frequency and therefore you can change the tone.

#### Temperature Monitors

This indicates the use of an LED whenever the voltage of the battery drops to less than 9 volts. This is the simple electronic circuits is great in monitoring the charge level in small 12V batteries. Furthermore, these batteries are very useful in portable devices as well as in burglary alarm systems. In addition, the functioning of the circuit is dependent on the biasing of base terminal of your T1 transistor.

Also, whenever the battery’s voltage is higher than 9 volts, then expect the voltage present on the base-emitter terminals to remain exactly the same. With this, both the LED and the transistors will be off. Whenever the battery’s voltage drops less than 9V as a result of the utilization, then the T1 transistor’s base voltage drops so the emitter voltage doesn’t change. This is because of the completely charged capacitor.

#### Touch Sensor Circuits

The touch sensor simple electronic circuits are created using three main components. These include the light-emitting diode, a transistor, and a resistor. Also, both the LED and the resistor are connected in series using its positive supply and then to the transistor’s collector terminal.

#### The Multimeter Simple Electronic Circuits

The multimeter is a simple, basic, and essential electrical circuit used in measuring current, resistance, and voltage. Furthermore, it is useful in measuring the DC and the AC parameters. In addition, the multimeter also includes the galvanometer which is connected in the series pattern with resistance. Also, you can measure the voltage formed across this circuit when you place the multimeter’s probes across your circuit. Note that the multimeter is majorly useful for the windings’ continuity in the motor.

#### LED Flasher Simple Electronic Circuits

The LED flasher circuit is usually built using one of the very popular components such as the integrated circuits and the 555 timer. This circuit helps in blinking the led OFF and ON at different and regular intervals.

From the left side to the right side in the circuit, the two transistors and the capacitor sets the time required in switching the LED OFF and ON. These include a circuit inside, however it is usually enclosed in your integrated circuit. The location of these two capacitors is on the timer’s right side and these are necessary for the proper functioning of the timer

Also, the final part is the resistor and the LED. This resistor is useful in restricting the amount of current present on the LED. Therefore, no damage will come to it.

#### Burglar Alarm Invisible Simple Electronic Circuits

Here, the invisible burglar alarm’s circuit is built using the IR LED and the phototransistor. Whenever an obstacle is absent where the infrared rays passes through, the alarm won’t create a buzzer sound.

Whenever someone crosses this infrared beam, this same alarm creates a buzzer sound. Furthermore, when the infrared LED and phototransistor are closed in the black tubes and perfectly connected, the range for the circuit is just 1 meter.

## Conclusion

The process of creating simple electronic circuits comes easy. This involves connecting different electronic and electrical components making use of connecting wires. Beginners should find the entire process easy.

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