FM (Frequency Modulation) is a common way to send audio by radio signals. Many people like making FM transmitters with Arduino because DIY electronics is getting popular. In this project for Simple Arduino FM Transmitter Circuit we have used Arduino Uno, KT0803K FM module, 7809 voltage regulator and simple antenna to make FM transmitter. This […]
Transmitter Circuit
Long Range IR Transmitter Circuit
Compared to basic circuit this Long Range IR Transmitter Circuit can send IR light farther using easy parts. Main idea is to make IR LED blink light in pulses. Most IR receivers catch specific frequency made by IC 4047. Using more LEDs together or stronger LED gives more IR light, so with better range. This […]
Simple FM Microphone Transmitter Circuit
FM mic transmitter is small device. It changes sound from mic into radio signal. FM radio can hear it in short distance. This Simple FM Microphone Transmitter Circuit uses one NPN BC547 transistor. Even it is small it can send FM signal pretty far. Circuit Working: Parts List: Category Description Quantity Resistors 330Ω 1/4 watt […]
Simple Phone Transmitter Circuit
Simple Phone Transmitter Circuit uses few parts. It take sound from phone talk and changes to signal. Signal goes far using antenna. This circuit is easy to make and works well with landline phone. Circuit Working: Parts List: Category Description Quantity Resistors 10k, 47k, 330Ω (1/4 watt each) 1 each Capacitors Ceramic 47pF 3 Semiconductors […]
Long Range FM Transmitter Circuit (2km)
This Long Range FM Transmitter Circuit (2km) send voice or music on FM radio. It can cover up to 2 km range with good antenna. It use small microphone to take sound and then circuit make signal. Signal goes to antenna and any FM radio can catch it. It runs on 12V battery with simple […]
Spy Phone Bug Transmitter Circuit
This circuit for Spy Phone Bug Transmitter Circuit is like small secret listening thing. It can listen and record phone talk which people do not know. This type device is called bug or transmitter. It spy on people who talk, so using it is not a good idea. Also in some country this circuit maybe […]