Build a simple incandescent lamp flasher using a 7555 timer and MOSFETs. Ideal for DIY projects with adjustable flash rate and low parts count.
Author: Prabakaran
Prabakaran is a seasoned author and contributor to leading electronics and communications magazines around the world, having written in publications such as Popular Communications Magazine (USA), ELEKTOR (UK), Monitoring Times (USA), Nuts & Volts (USA), and Electronics For You (India).
OSPI vs QSPI in ATS Mini Radio: How to Identify Your Flash Interface
Learn the difference between OSPI and QSPI flash interfaces in ATS-Mini radios and how to identify your hardware variant. Practical checks using chip markings, PCB traces, and firmware logs to ensure correct firmware flashing.
HackRF Pro: Great Scott Gadgets Unveils Powerful New SDR
Meet the HackRF Pro from Great Scott Gadgets. This powerful successor to the HackRF One features a 100 kHz to 6 GHz range, built-in TCXO, and USB-C for advanced SDR development
APRS.Chat : The Modern Mailbox for Your APRS Callsign
APRS.Chat is a web-based mailbox for APRS users, storing all your messages even when your radio is offline. Reliable, modern APRS communication.
Tiny FM Transmitter with Just a Few Easy-to-Find Components
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.