JLCPCB PCB Fab & Assembly from $2! Register to get $70 Coupons: 6-layer PCBs start just $2! Get a $30 OFF coupon for 6-layer PCBs: 🚀 Introducing PhaseLatch Mini – A Low-Cost, Dual-ADC SDR Frontend for the Retro RF Journey! 📻✨ Blog post: 💾 GitHub (Schematics, Code, Docs): 🛒 Order Boards & Kits from my store: 💬 Join the Hackerspace Discord: The MOS 6502 CPU turns 50 in 2025 — and while I’m still pushing for a full modern SDR powered by a 6502 at its core, this video is all about a powerful little detour: PhaseLatch Mini. PhaseLatch Mini is an open-source, STM32F103-based direct-conversion SDR front-end designed to pair with the PhaseLoom IQ mixer, the 65uino, or any project that needs simultaneous I/Q sampling over USB. With dual ADCs, DMA streaming, and a clean analog front-end, it’s a compact and budget-friendly way to experiment with HF reception, IQ imbalance, mirror rejection, and custom firmware — all without needing expensive hardware. Whether you’re into ham radio, DSP, or hardware hacking, PhaseLatch Mini gives you a simple and flexible way to capture IQ data, feed it to GQRX or GNURadio, and explore everything from 40m amateur bands to FM broadcast. 🔥 PhaseLatch Mini Highlights ✅ Dual simultaneous ADC channels (perfect for I/Q sampling) ✅ USB streaming via cheap STM32 “Blue Pill”-style microcontrollers ✅ Designed to pair with PhaseLoom or standalone mixers ✅ Open hardware + PlatformIO firmware + Python host scripts ✅ Low-cost, compact SDR dev board with 200 kHz+ bandwidth 🔧 Sponsors & Gear Big thanks to JLCPCB and Fnirsi for supporting this project! Fnirsi 2C53T handheld oscilloscope: (Use code “Anders6%” for a discount!) Fnirsi official store: AliExpress: Amazon (US): Fnirsi DPOS350P 350MHz Oscilloscope (Use code “Anders6%” for a discount!) AliExpress: Amazon (US): Other Gear Used: ST-Link v2: ⏱️ Cheap Si5351 module: USB SDR Options: • 100kHz– (RX Only): • HackRF One w/ Portapack 1MHz–6GHz (TX & RX): • Stick type 100kHz– (RX Only): (I earn a small commission if you buy from the links above — thank you for supporting the channel!) 📚 Learn More About SDR 📚 Dan Tayloe's Whitepaper: 📹 SDR with HackRF (great GNURadio intro): 🎥 Credits & Resources 🎶 Music: Tamlin – Alive [NCS Release] Music provided by NoCopyrightSounds Free Download/Stream: Watch: 👍 Like & subscribe for more retro hardware meets modern RF projects! #SDR #Electronics #HamRadio #RetroComputing #PhaseLatchMini #6502 Join this channel to get access to perks that let you see videos early and make you stand out in comments: