Category: Electronics and Communication Projects

Various types of electronics and communication projects (ECE) projects are listed in this categorey, 50+ ECE projects with PCB design

How to Build an Infrared Jammer Circuit

Engineeering Projects
infrared jammer circuit

The infrared jammer circuit can be utilized for either practical means or to create a fun experiment. The general idea is that this little contraption is supposed to be powered by a high-powered infrared light that works against any gadget dependent on infrared signals, including TV remotes, auto-focus cameras, and even devices of the spy class. In this guide, you’ll learn how to build your own infrared jammer circuit to block infrared signals in a room. This tutorial is ideal for hobbyists and those interested in counter-surveillance. How Does an…

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Frequency Shift Keying Demodulator Circuit

Engineeering Projects
Frequency shift keying demodulator circuit

Frequency Shift Keying (FSK) plays a significant role in the field of computer peripheral and wireless communication, facilitating the transmission of binary data or code. This technique involves the manipulation of a carrier frequency, which undergoes precise shifts between two pre-established frequencies. The utilization of FSK allows for efficient and reliable data transfer. Description of Frequency Shift Keying Demodulator Circuit An area where FSK finds particular utility is in demodulating signals, and the 565 phase-locked loop (PLL) serves as an excellent tool for FSK demodulation. In this context, a binary…

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Linear Integrated Circuit Modulator

Engineeering Projects
LIC modulator using programmable dual op-amp

The process of generating high-quality AM signals economically is greatly simplified by the availability of low-cost specialty linear integrated circuits (LIC). This is especially true for low-power systems, where low-level modulation schemes are attractive. Linear Integrated Circuit Modulator using OTA As an example, the RCA CA3080 operational transconductance amplifier (OTA) can be used to provide AM with an absolute minimum of design considerations. The OTA is similar to conventional operational amplifiers inasmuch as they employ the usual differential input terminals, but its output is best described in terms of the…

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40 Channel Citizen Band Transceiver

Engineeering Projects
40 Channel Citizen Band Transceiver

The availability of low-cost PLL and programmable divider ICs has led to the use of synthesizers in virtually all channelized transceivers. This is true even for the very low-cost systems used on the 40-channel citizen band transceiver. The circuit of the 40 Channel Citizen Band Transceiver is shown in Fig. 1 allows all necessary frequencies for a CB transceiver to be generated by using a single-crystal oscillator. The 40 channels are spaced at 10-kHz intervals (with some gaps) between 26.965 and 27.405 MHz. Local oscillator frequencies for the reception of…

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Laser Based Communication Link

Engineeering Projects
laser based communication link transmitter circuit

Communication is an essential part of our daily life. The project; “Laser-Based Communication Link” allows people at a distance of around 500 meters to communicate wirelessly through a laser. Various other laser-based projects posted on bestengineeringprojects.com are:- (a) Speech Communication using Laser (b) Mini Laser Turret (c) Laser Voice Transmitter Circuit The project unlike other wireless media uses laser light from the transmitter torch as a carrier instead of RF signals used in the conventional system. At the receiver end, the phototransistor should be aligned in a line of sight position…

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Arduino FM Transmitter

Engineeering Projects
block diagram of fm transmitter circuit using arduino

The project “Arduino FM Transmitter” is a radio station with transmits either voice or music nearby area, within the range of 50 meters range. The transmitted FM signal is received by any FM receiver. Previously, we had posted an Arduino-based FM Receiver with the facility of automating or manual tuning. The project uses very few components i.e Arduino uno board (MCU) and an FM transmitter V2.0 module. This project has various applications like it can be implemented in college hospitals etc. where announcements have to do. The block diagram of…

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Arduino FM Receiver Circuit using TEA5767

Engineeering Projects
author prototype of fm receiver using arduino

The circuit posted here is of Arduino FM Receiver using digital radio—receiver module TEA5657 by Philips. Additional components like audio power amplifier, Arduino uno board, and LCD module to display station number and frequency. However, for the receiving system to function flawlessly, external components like a capacitor, resistor, etc are included in the circuit, which is necessary. if you wish to make your FM transmitter circuit using Arduino please go through this link: Arduino FM Transmitter Description Arduino FM Receiver Circuit using TEA5767 The circuit of the project Arduino FM…

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Cell Phone Jammer Circuit

Engineeering Projects
circuit diagram of cell phone jammer

Introduction to Cell Phone Jammer Circuit: Our addiction to technological development has made it so that it is almost impossible to imagine a day without those amazing inventions. Cell phones popular as mobile phones are the ones we cannot separate from the essential list. By now, they have become an inseparable part of our lives. Talking about a country like Nepal which has a low population (approx. 5 million), mainly two categories of cell phone carriers are available namely; NTC and Ncell. They use GSM 900 or 1800 systems. The…

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Speech Communication using Laser

Engineeering Projects
speech communication using laser receiver circuit

Light offers the fastest path for transmission of signals in comparison to any other medium. The circuit “Speech Communication using Laser” makes use of this aspect, it is a one or two-way optical communications system using a short-wavelength visible laser diode (say, RLT6505 or the laser module of a laser pointer) as the light-emitting element, free space as the transmission media and a light-dependent resistor as the light-receiving element. This system is a perfect medium for speech communication between two adjacent offices or between homes on the opposite sides of…

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Simple Radio Transmitter

Engineeering Projects
circuit diagram of simple radio transmitter

The circuit shown here is of the simple radio transmitter which is used to transmit a voice signal up to 20M and is listening to a radio resistor. The complete circuit is built around a single transistor followed by a micro-phone and an MW antenna for any old radio. If the sound is not clear at the receiver, then adjust the ferrite core of the MW coil and fixed it where clear sound listens. Check out other interesting projects based on FM posted on bestengineeringprojects.com Arduino FM Receiver Circuit using…

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