Cool Electronics Circuits
Electronic Circuit Ideas Collection.
Friday, January 30, 2026
Mini-Radio Firmware V3 Adds RTTY/CW Decoding and EiBi Integration
Wednesday, January 28, 2026
Noise Cancelling Condenser Microphone
Kill the noise, keep the voice. 🤫🎙️
The VU3DXR Noise-Canceling Condenser Mic is a game-changer for clear communication. Perfect for #HamRadio, streaming, and voice-overs. High sensitivity meets professional noise rejection.
Get yours here:
#VU3DXR #RadioGear #AudioTech #Microphone
Build a High-Sensitivity Regenerative Receiver with 2N7000 MOSFET
Just came across a very nice DIY project on building a high sensitivity regenerative receiver using a 2N7000 MOSFET. The design shows how a simple regenerative circuit, using positive feedback and a single active device, can achieve impressive sensitivity on medium wave and shortwave bands.
The article explains coil winding, tuning, regeneration control and practical construction tips, making it ideal for radio amateurs, students and experimenters who want to understand classic receiver principles with modern, easily available parts. It is a great weekend build for anyone interested in analog RF, homebrew receivers and learning how regeneration can rival much more complex superheterodyne designs in sensitivity when carefully adjusted.
The full project is available at https://vu3dxr.in/build-a-high-sensitivity-regenerative-receiver-with-2n7000-mosfet/