Now, when it comes to electronics, we all know how fast it has progressed in the last few years. I have been following several digital electronics video lectures to keep up with the things that are going on in the field. It has been a crazy journey as of now. Though recently I was encountered with a question, which I am going to tell you later, that made me write this article. So, what was the question?
What are some simple DIY electronics project ideas that do not require a degree?
Well, I stubbed after reading it. There are several things that you can do, which is no longer dependent on costly degrees or professional electronic product developers. Many cheap and readily available beginner electronic equipment are available in the market, which can be purchased to make things more better. Microcontrollers like the Arduino and Raspberry Pi have given rise to a community which deals with new projects and new members every day. You won’t be the next Nikola Tesla overnight! So, that’s why we have decided to provide you with some of the best DIY beginner electronic design projects which will help get you started. Skills are required to make these projects, but they are not impossible.
– Colour Changing Night Light: If you have children, then you must know how difficult it can become to actually persuade them that there’s nothing under their bed or inside the closet. This happens because many kids are afraid to walk in the dark, and at some point, this might have been the case with us too. So the best option is to create something like a night light. This project highlights how to do just that, providing you with the perfect opportunity to solve a problem. This also helps you in educating yourself and your kids. This is on the basics of electronics, and you have a multi-color night light to show for it.
– Invisible Burglar Alarm: The circuit of the invisible burglar alarm is built with two major things, including phototransistor and an IR LED. If there is no obstacle in the path of infrared rays, then the alarm will not create the buzzer sound. So when does it creates the sound? Well, this happens when somebody crosses the infrared beam is passed. If the phototransistor and the infrared LED are in black tubes and then connected perfectly, we can get the circuit range of up to 1 meter.
The infrared beam when falls on the L14F1 phototransistor, it performs to keep the BC557 (PNP) out of conduction. The buzzer does not generate the sound in this condition and when the phototransistor turns OFF, allowing the PNP transistor to work, this makes the buzzer make a sound. You will need to fix the phototransistor and infrared LED with the correct position to make the buzzer silent. Make sure to adjust the variable resistor to set the biasing of the PNP transistor. This way you will be able to make a perfect invisible burglar alarm and make it worth using.
– FM Transmitter: The circuit of the FM transmitter has three important stages, including the input stage, the modulation stage, and the output. When it comes to the input stage, it consists of capacitors C3 and C1, and resistor R1. We also know that the input signals into the FM transmitter must not contain a DC component. This is because it would adversely affect the modulation/oscillation stage and therefore no FM signal would be generated.
This happens because of the saturation of the transistor. C3 is used to couple the input signal, whereas R1 provides biasing for the transistor. In the modulation/oscillation stage, a carrier signal is modulated by the input signal. In this stage, the oscillator consists of C2, L1, C4 and R2. Among these, the frequency of oscillation is determined by C2 and L1. When power is applied, a rush of current flows through the inductor. Finally, the modulated signal is fed into the antenna. This helps in transmitting the EM waves generated by the current as it oscillates.