Learn how to build a compact Tiny FM transmitter using 2N3904, a few passive parts, and a simple air-core coil. Perfect for DIY electronics enthusiasts
An End of an Era: Decommissioning NOAA-15 and NOAA-19 Polar Satellites
NOAA-15 is scheduled for decommissioning on August 12, 2025, with NOAA-19 following a week later on August 19, 2025, have exceeded their primary mission lives
27MHz AM Transmitter Circuit for hobbyists
The 27MHz frequency band has long been a favorite among electronics enthusiasts and amateur radio operators. This citizen’s band frequency offers excellent propagation characteristics and serves as an ideal starting point for understanding amplitude modulation (AM) transmission principles. Today, we’ll explore a well-designed 27MHz AM transmitter circuit that demonstrates classic RF engineering concepts while remaining accessible to hobbyists
AM Radio into an SSB Receiver with a Simple BFO Circuit
Learn how to convert a standard AM radio into an SSB receiver using a simple BFO circuit. Step-by-step guide to receiving single sideband signals on your homebrew or vintage radio.
Active AM Band Antenna for Better Reception
Improve AM signals! Build an active am band antenna with this simple circuit. Boost weak signals with JFET input & multi-stage amplification. Easy DIY
Simple Receiver S-Meter Circuit for Your Radio
Stop guessing signal strength! Build this easy, low-cost S-Meter circuit to give your homebrew radio a professional visual indicator for incoming signals and tuning.
Simple UJT Morse Code Practice Oscillator Circuit
Learn to build a simple UJT Morse code practice oscillator with basic components. Perfect beginner electronics project for ham radio enthusiasts.
Automatic Battery Saver Circuit: Prevent Battery Drain
Dead batteries are every electronics enthusiast’s nightmare. Whether it’s a forgotten device left running overnight or equipment accidentally switched on, battery drain can be costly and frustrating. This automatic battery saver circuit offers an elegant solution using the versatile 4060 oscillator and counter IC, providing reliable protection for your battery-powered projects. How the Battery Saver […]
Pink Noise Generator Circuit Using 741 Op-Amps
Learn how to build a pink noise generator using 741 op-amps for audio testing and frequency response analysis, a simple Pink Noise Generator Using 741 Op-Amps
Build a Simple Speech Processor Circuit Using LM358
A speech processor is an essential component in amateur radio and audio systems that enhances voice clarity and intelligibility. This comprehensive guide will walk you through building a simple yet effective simple speech processor circuit using the LM358 operational amplifier and discrete components. A speech processor is an electronic device that modifies audio signals to […]