In this post we learn how to make a simple homemade walkie talkie circuit using ordinary FM transmitters and FM radios. Overview In one of my earlier post we comprehensively learned the making of a compact walkie talkie design, however I found that many new hobbyists and school students found the design difficult to adjust … Read moreMake a Walkie Talkie Circuit using FM Radio
In this post we are going to construct a farmer friendly GSM pump motor controller circuit which could turn on and off the irrigation system remotely from anywhere in the world via cellphone SMS and return you with an acknowledgement message. The idea was requested by Mr. PG Ragavandir. The Design Agriculture is one … Read moreGSM Pump Motor Controller Circuit using Arduino
In this article we are going to take a tour on RFID circuit technology. We will be exploring how RFID tags and readers work, how to interface RFID module (RC522) with Arduino and extract some useful information from the RFID tags. Using RFID Tags I am sure every one of you has used RFID … Read moreRFID Reader Circuit using Arduino
The post explains how to build a simple remote controlled game scoreboard circuit with two digits for facilitating the user a hassle free changing of the digits remotely, during a game or a match. The idea was requested by Mr. Richard. Circuit Objectives and Requirements For our co-ed volleyball game we use manual flip cards … Read moreHow to make a Remote Controlled Game Scoreboard Circuit
This circuit will allow the user to lock his car ignition using his phone Bluetooth, meaning the ignition can be locked/unlocked only through a specific code from the user’s cellphone Bluetooth. Overview In one of my earlier posts I have already explained how to hack a Bluetooth headset and use it for any desired switching … Read moreBluetooth Car Ignition Lock Circuit – Keyless Car Protection
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