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The TOKYO HIGH POWER RF amplifier HL-2K is an RF amplifier using two 3-500Z valves that is working on all ham bands, including WARC. It is well built and is a nice looking amplifier, but has some problems and needs some improvements. |
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Petit tuto pour programmer un Arduino Pro-mini en ICSP avec un programmateur USBASP 2.0 Dans certains cas, il peut être nécessaire de programmer un Arduino via le port ICSP. Par exemple, si le microcontrôleur a été remplacé par un neuf, si par mégarde le bootloader a été corrompu ou effacé, si le programme injecté est corrompu et qu'il n'y a plus d'accès via le port USB ou le connecteur FTDI, si le logiciel est distribué au format HEX, si on n'a plus accès au microcontrôleur via le port USB, etc... |
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Having gained some experience with my weather station project described in the APRS LoRa weather station article, and having a few LoRa RFM95W modules, I decided to carry out a feasibility test for a very low-power mini weather station. The initial results were very encouraging, so I continued my project until I had a mature design. |
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Lilygo LoRa modules from Lilygo are advertised to provide a power output of +20dBm (100mW). I found that none of my modules reached the advertised power, which was more like +17dBm. |
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Description of a versatile weather station. Features : - Built around a TTGO T3 LoRa 433 MHz module - Sensors for temperature, pressure, humidity, rainfall, wind speed and direction. - Protocols: APRS via LoRa, APRS-IS, MQTT and Wunderground via WiFi. - Wifi with DHCP or static address - OLED display with or without screensaver. - Password-protected OTA updates. - Web server with all datas. - LoRa fallback if WiFi or Internet fails - etc... |
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