Quoi de neuf 2021
From Eric
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== February 2021 == | == February 2021 == | ||
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| + | * I have added a Python MQTT client to log the temp, nhumidity, pressure, etc. data to a mysql database. I use "sqlbrowser" to display the content of the data base. If I find some time, I'll write a Python HMI. | ||
== January 2021 == | == January 2021 == | ||
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* Waiting for the transformer to drive an CRT (see [[Quoi de neuf 2020]], december). | * Waiting for the transformer to drive an CRT (see [[Quoi de neuf 2020]], december). | ||
* I have created a LED "spectrum analyzer" using an electret microphone, a 5532 op amp (see [http://www.michelterrier.fr/radiocol/detail2003/preamp-electret.htm#Antoine here]), a BA3830S spec. anal., and a [https://www.ti.com/lit/ds/symlink/lm3914.pdf LM3914] LED display driver. Nothing very complicated, but just a way to occupy time. Here is a picture of the breadboard setup: [[File:spectrum_analyzer_led_bb.jpg|400px|thumb|none]], the scheme [[File:spectrum_analyzer_led_schema.jpg|400px|thumb|none]] and the PCBs [[File:spectrum_analyzer_led_pcb1.jpg|400px|thumb|none]] [[File:spectrum_analyzer_led_pcb2.jpg|400px|thumb|none]]. | * I have created a LED "spectrum analyzer" using an electret microphone, a 5532 op amp (see [http://www.michelterrier.fr/radiocol/detail2003/preamp-electret.htm#Antoine here]), a BA3830S spec. anal., and a [https://www.ti.com/lit/ds/symlink/lm3914.pdf LM3914] LED display driver. Nothing very complicated, but just a way to occupy time. Here is a picture of the breadboard setup: [[File:spectrum_analyzer_led_bb.jpg|400px|thumb|none]], the scheme [[File:spectrum_analyzer_led_schema.jpg|400px|thumb|none]] and the PCBs [[File:spectrum_analyzer_led_pcb1.jpg|400px|thumb|none]] [[File:spectrum_analyzer_led_pcb2.jpg|400px|thumb|none]]. | ||
| - | * I am also playng with my cubecell. I have attached a solar panel, a battery, and a CJMCU-8128 set of sensors. The guy transmits it data via LORA to a ESP32 which ralays them to a MQTT Mosquitto server running on an | + | * I am also playng with my cubecell. I have attached a solar panel, a battery, and a CJMCU-8128 set of sensors. The guy transmits it data via LORA to a ESP32 which ralays them to a MQTT Mosquitto server running on an RPi... |
Revision as of 09:23, 7 February 2021
Experiments carried out in the past (from 2011) are described hereafter: 2020, 2019, 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011
February 2021
- I have added a Python MQTT client to log the temp, nhumidity, pressure, etc. data to a mysql database. I use "sqlbrowser" to display the content of the data base. If I find some time, I'll write a Python HMI.
January 2021
- I have moved my lab to a new, much larger, room:
- Waiting for the transformer to drive an CRT (see Quoi de neuf 2020, december).
- I have created a LED "spectrum analyzer" using an electret microphone, a 5532 op amp (see here), a BA3830S spec. anal., and a LM3914 LED display driver. Nothing very complicated, but just a way to occupy time. Here is a picture of the breadboard setup: , the scheme and the PCBs
.
- I am also playng with my cubecell. I have attached a solar panel, a battery, and a CJMCU-8128 set of sensors. The guy transmits it data via LORA to a ESP32 which ralays them to a MQTT Mosquitto server running on an RPi...
