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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

How to Make a Wireless Robotic Arm using Arduino

robotic arm working simulation

This robotic arm circuit which can be also implemented like a robotic crane, works using 6 servo motors and can be controlled through a microcontroller remote control, using an Arduino based 2.4 GHz communication link. Main Features When you are building something as sophisticated as a robotic arm, it must look modern and must include many … Read moreHow to Make a Wireless Robotic Arm using Arduino

Ultrasonic Wireless Water Level Indicator – Solar Powered

In this post we are going to construct a ultrasonic based solar powered wireless water level indicator using Arduino in which the Arduinos would be transmitting and receiving at 2.4 GHz wireless frequency. We will be detecting the water level in the tank using ultasonics instead of traditional electrode method. Overview Water level indicator is … Read moreUltrasonic Wireless Water Level Indicator – Solar Powered

Wireless Office Call Bell Circuit

call bell remote control circuit

In this post we are going to construct wireless office calling bell which can be used for calling 6 different personnel from head’s / boss’s desk or some other calling bell type fun project for your home. Using nRF24L01 2.4 GHz module We will be constructing a simple wireless calling bell using Arduino and nRF24L01 2.4 … Read moreWireless Office Call Bell Circuit

Make this IR Remote Control Range Extender Circuit

433MHz transmitter circuit with infrared TSOP1730 IC

In this post we will learn how to increase or extend the range of an ordinary infra red or IR remote control through a 433MHz RF remote control system. IR Range Extender Concept The idea of this circuit is to feed the IR data from an IR transmitter into the transmitter input of an RF … Read moreMake this IR Remote Control Range Extender Circuit

3 Simple Proximity Sensor Circuits

Three useful proximity sensor concepts are explained here, the first one using an ordinary opamp LM358, the second one using IC LM567 which functions with a phase locked loop principle ensuring very accurate response for the detection. The third circuit works using the ubiquitous IC 555. Let’s learn each one with a step by step … Read more3 Simple Proximity Sensor Circuits

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