Emergency Hardening for PHP CVE-2026-109618 and CVE-2026-109619 on a Legacy Apache Server PHP uses longjmp() for out-of-memory (OOM) errors to exit the current context and abort handling of the request. In some contexts, request memory is temporarily reachable before it is fully initialized. If any allocation fails at that point, Read more
Mulled Wine Temperature Tracker Monitoring and maintaining a precise temperature is crucial when preparing mulled wine to preserve its rich flavors, aromas, and alcohol content without boiling away its core characteristics. This article presents a comprehensive thermal analysis and monitoring overview of an automated mulled wine boiler system, utilizing logged Read more
Raspberry Pi Pico 2 Pico 2 Wireless Problems with multiple Dallas DS18B20 sensors Initial setup 1 6 x Dallas DS18B20 sensors 2.2 Kilo ohms for Data line 2 Wifi enabled Just about 10 meters away 3 MicroPython code MicroPython (RP2040) Symptoms 1 Erratic Wifi connection Requires plug / unplug 5V Read more
RXP2600: Contest TCVR – HIGH Performance CW only Superhet + SDR 9 Mc IF + 2 xAD603 + FST3125 IQ detector H-mode mixer FSA3157 +Â ET1-6TSM20 Low cost D.D.S. Si5351 + custom low pass filters Hilbert digital F.I.R. Teensy 4.1 with custom code. Digital sampling A.G.C. Arduino nano + AD8307 Read more
SO2R bandpass filters For Multi-Multi or SO2R operations, quality bandpass filters are needed. Not only produced harmonics have to be rejected, but any below frequencies also, to minimize distortions produced by receiver itself in presence of strong outband signals. SO2R filters 121 dB attenuation Low cost Easy to build Alignement Read more
YO8RXP radio shack — Home made building Hardware 98% Software 99% Shack construction 96% Electric floor heating Xiaomi BLE   Wired Dallas DS18B20 temperature sensors will provide inside climate feedback towards Raspberry PI, which via power relays and contactors will start / stop about 20 square meters of Magnum heating foil Read more
Schematics available ! At this page bottom, you can find PCB tab where one can see the schematics involved. Once software will be complete, will be available under my Github account Being a DIY hamradio, I always needed a good signal generator for HF bands and an oscilloscope too. After Read more
Arduino A.G.C Control is in you hands. Decay time, fall time, rise time, values Arduino Nano C++ Main Loop@10Khz AD8307 Logarithmic detector, DC to 500 Mhz 12 bit MCP4725 DAC output to AD603 I.F. https://yo8rxp.com/wp-content/uploads/2022/12/VID_20221208_181755.mp4 Video with AGC voltage drop while input signal is increasing This is Work in Progress Read more
Work in progress Contest transceiver Teensy 4.1 SDR Yet another hamradio project I am working on As hamradio, I love buiLding things ! Even it will not be a factory like tranceiver, I will give my best to be as small as possible, only few bands Will be CW only, Read more
Hamradio and software come to life During big contests it can be useful to have a touchscreen antenna switch placed near computer keyboard to be handy. In my case I do have a relays flip wire antenna for 40 meters and East / West FB ratio is quite big as Read more