Build a simple 40 m CW transmitter using a 2N2222 and 7 MHz crystal oscillator — a minimalist QRP design with keyed oscillator and low-pass filter for clean HF Morse transmission.
Simple FM Transmitter Using BC547 Transistors
If you’re a radio electronics enthusiast or hobbyist, building a Simple FM transmitter using readily available components like BC547 transistors can be both fun and educational. This compact circuit transmits voice signals captured via an electret microphone to a standard FM radio receiver, making it perfect for short-range audio transmission projects. Simple FM Transmitter – […]
Build Your Own Two Transistor Radio: A Simple DIY Project
Do you love electronics and want a fun, beginner-friendly project? Build a two transistor radio! This classic DIY project, featuring simple components, gained popularity years ago and still teaches radio technology effectively. Let’s explore how you can create your own two transistor radio easily. What is a Reflex Circuit? A reflex circuit cleverly reuses one […]
Reflex radio: A Deep Dive into the one transistor radio
Maximize performance with minimal parts! Discover how the reflex circuit “recycles” its transistor to boost signal strength, making it the perfect DIY project for radio experimenters.
Crystal Radio Explained – How to Build Your Own No Power Radio
Discover the magic of “no-power” radio! Step-by-step instructions on building a crystal set that runs entirely on the energy of the radio waves it receives.
DIY Lithium-Ion Solar Charger for 2-Cell Batteries
Harnessing solar power to charge lithium-ion batteries is not only energy-efficient but also an eco-conscious choice for portable electronics. In this article, we explore a compact and reliable lithium-ion solar charger circuit that uses a few standard ICs: LM2941, LM3420-8.4, and LMC662. Designed for charging a 2-cell Li-ion battery pack, this setup is ideal for […]
LILYGO T-Embed ESP32 SI4732 Radio: In-Depth Technical Analysis & User Review
In-depth review of the LILYGO T-Embed ESP32-S3 SI4732 multiband DSP radio covering hardware architecture, reception performance, firmware ecosystem, and real-world usability for makers, SWL, and ham radio enthusiasts.
HydraSDR RFOne – Technical limitations and driver problems plague the promising hardware platform
HydraSDR RFOne offers strong RF hardware but faces driver maturity and software compatibility limits — including SDR app support gaps, HDR mode restrictions, and evolving open-source tooling.
DIY IRF510 AM Transmitter Circuit
This blog post dives into a detailed DIY IRF510 AM transmitter circuit using the IRF510 MOSFET, perfect for radio enthusiasts and electronics hobbyists
Incandescent Lamp Flasher using IRF510 HexFET
The circuit Incandescent Lamp Flasher is built around two FETs, which are configured as simple astable multivibrator to alternately switch two lamps on and off.