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Long Range FM Transmitter

EFY Bureau
Several circuits for constructing FM transmitter have been published in EFY. The power output of most of these circuits were very low because no...

Build A Long Range FM Transmitter

EFY Bureau
Have you ever wanted to broadcast your own radio station within the neighborhood? Ever get curious on where people get those "Surveillance Bugs" from...

DIY Raspberry Pi FM Transmitter

Ashwini Sinha Inventor of IndusBoard Coin from EFY Labs
I built a Raspberry Pi FM transmitter using only software without any external RF modules or transmitter HATs. Let me explain step-by-step. The Raspberry Pi,...

Mini FM Radio Earbud: DIY RDA5807M Receiver Circuit Project

Ashwini Sinha Inventor of IndusBoard Coin from EFY Labs
In the June issue, the construction of a Miniature Watch-Style FM Radio delivering stereo FM output was described. Building on that concept, the next...

TV To FM Converter Using Single Transistor

Raj K. Gorkhali, Electronics hobbyist
Here is a simple circuit of TV to FM converter. With this simple one-transistor BF494 circuit. you will be able to receive FM and...

Remote Controlled Stereo FM Radio With RDS Using ESP-01

K N Antony
In this article, we will explore a straightforward method to create an IR remote-controlled FM radio with RDS (radio data system) using the ESP-01...

Designing Simple FM Radio Receiver Circuit

D. Prabakaran
Here’s a simple FM receiver with minimum components for local FM reception.

Smallest FM Audio Bug Spy Device

Ashwini Sinha Inventor of IndusBoard Coin from EFY Labs
As seen in James Bond movies, audio spy bugging devices are used by intelligence agents in different parts of the world. These devices can...

TFMini Precision Gauge

Somnath Bera, AGM, NTPC Limited
The idea of buying a TFMini LiDAR was to build a radar but for many days nothing really got kicked off and then one...

Make A Crystal-Locked FM Transmitter

Joy Mukherji
The circuit presented here uses a crystal oscillator and frequency multiplier to generate a highly-stable carrier signal frequency of 96MHz. With 40mW of RF...
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