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Amateur Radio, Tech Insights and Reviews

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Ambien ESP32 CO2 sensor with 4.2 inch e-paper display showing temperature humidity and CO2 readings
amateur radio open source Technology

Ambien: An ESP32 CO2 Sensor With E-Paper That Runs a Year on Two 18650s

9M2PJU 03.11.2026

mcer12's Ambien pairs an ESP32 with Sensirion CO2 and humidity sensors and a 4.2 inch…

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Pebble HF ultra-portable 20-meter QRP amateur radio transceiver kit with OLED display and built-in controls
amateur radio open source Technology
9M2PJU 0 Comments

Pebble HF: The Ultra-Affordable 20M QRP Transceiver Kit for Portable Operations

The Pebble HF is an ultra-affordable, pocket-sized 20-meter QRP transceiver kit offering up to 5W…

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16.09.2026
amateur radio linux open source Technology
9M2PJU 1 Comments

Open Hamclock Backend (OHB): Keeping Thousands of HamClocks Alive with Open Source Infrastructure

Open Hamclock Backend (OHB) is an open-source community server project that replaces the sunsetting Clear…

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16.08.2026
amateur radio open source Technology
9M2PJU 2 Comments

CYD Ham Dashboard: Turn a $10 ESP32 Cheap Yellow Display into a Touchscreen Ham Radio Shack Monitor

The CYD Ham Dashboard turns an affordable $10 ESP32 Cheap Yellow Display into a standalone…

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16.08.2026
amateur radio open source Technology
9M2PJU 0 Comments

nyanBOX: The ESP32 and Triple-NRF24 Handheld 2.4GHz RF, Wi-Fi, and BLE Toolkit

A broad technical breakdown of nyanBOX, an open-source handheld 2.4GHz wireless security and spectrum analysis…

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16.08.2026
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