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27 MHz Transmitter Circuit – 10 Km Range

The 10 km range, 27 MHz transmitter circuit explained here uses citizen’s band which consists of 2 main types of users: radio control (R/C) modellists and users of low-power FM transceivers for local communication. However, here it is designed and intended for testing antennas and aligning receivers. It is actually an AM/FM quartz controlled for … Read more27 MHz Transmitter Circuit – 10 Km Range

GSM Car Ignition and Central Lock Circuit Using Arduino

Mobile screen info for GSM car lock circuit

In this post we are going to construct a GSM based car security system using Arduino, which can lock and unlock car’s ignition system and central lock by sending a password SMS to car from your cellphone By Arduino Guru Car theft can be a heart break; it feels like your loved one got kidnapped. … Read moreGSM Car Ignition and Central Lock Circuit Using Arduino

LiFi Internet Transmitter Circuit – USB Signal Transfer through LED

In this post we learn how to transmit Internet data through LiFi using a class D amplifier as the transmitter and an ordinary audio amplifier circuit as the receiver. How Li-Fi Concept Works If you are wondering how a LiFi concept could be used for transmitting USB data, this article will provide with all the … Read moreLiFi Internet Transmitter Circuit – USB Signal Transfer through LED

Bluetooth PWM Motor Controller Circuit

The post explains how to use Bluetooth technology for transmitting PWM wirelessly, the circuit application could be used for controlling various appliances such as motors, lights, RC gadgets etc using your Android phone. The Bluetooth PWM Transmitter In one of my earlier posts I explained how to hack and modify a Bluetooth headset for making … Read moreBluetooth PWM Motor Controller Circuit