To operate the circuit, connect the components as per the circuit diagram, give +15v and -15v supply to TL072 opamp and give audio input from mobile by connecting 3.5 mm audio jack to the circuit. Now ...

Infrared is the most commonly used wireless data transfer medium for limited range, and we already covered about simple IR Transmitter and Receiver circuit.Today in this Article, we will learn how to ...

Circuit and working. The circuit diagram of simple shortwave voice transmitter is shown in Fig. 1. It is built around power transistors 2N2219 (T1), BD139 (T2), and low-power audio amplifier LM386 ...

The transmitter can be crystal controlled to work at a frequency of 3MHz to 5MHz, which includes the ham radio bands of 3.5MHz to 3.7MHz and 3.89MHz to 3.9MHz. The author’s prototype is shown in Fig.

AM radios are relatively simple devices, and building one is a good way to start exploring the world of radio communications. [GreatScott] does exactly this in the video after the break, building b… ...