CircuitPython - Feather M0 Adalogger

The  Adafruit Feather M0 Adalogger  is a Feather family board from Adafruit that can be used to create data-logger.

Circuit-Python can be used with this board, however after loading the basic support there is not much other space for other libraries and the code.

CircuitPython

Notes about  Circuit-Python. 

On line is possible to find tons of documentation and description, this is just a my notes collection about Circuit-Python, another fast prototyping system like Arduino IDE.

AWS Cli

I often have to work with AWS on some projects and I discovered the AWS Cli tool, that allow to do lot of things on AWS from your machine terminal.

Raspberry streaming audio - notes and VLC server

Time ago I did buy and built a Pimoroni kit to have a streaming IP radio.
Is time to try to enhance it little bit and add some extra information.

A family size UV sterilizer - the electronic

At this point what is needed is a timer to control the lights and also a switch used for safety and to start the operations.

Old PSTN entry phone - door opening - #5

Arrived the PCBs !!!

I couldn't resist and immediately started to put together the first official prototype and ... did found a problem !!!

Previous articles :

• https://hanixdiy.blogspot.com/2020/05/old-pstn-entry-phone-door-opening-1.html
• https://hanixdiy.blogspot.com/2020/05/old-pstn-entry-phone-door-opening-2.html
• https://hanixdiy.blogspot.com/2020/05/old-pstn-entry-phone-door-opening-3.html
• https://hanixdiy.blogspot.com/2020/06/old-pstn-entry-phone-door-opening-4.html

Old PSTN entry phone - door opening - #4

In this article I'm  describing the final version of hardware and firmware for the door opening.

Previous articles :

• https://hanixdiy.blogspot.com/2020/05/old-pstn-entry-phone-door-opening-1.html
• https://hanixdiy.blogspot.com/2020/05/old-pstn-entry-phone-door-opening-2.html
• https://hanixdiy.blogspot.com/2020/05/old-pstn-entry-phone-door-opening-3.html

Old PSTN entry phone - door opening - #3

In this article I will discuss  about how to design a circuit capable to "read" the rotary dial and relative code.

Old PSTN entry phone - door opening - #2

 In the previous article I discussed about some theory of operations and how to deal with the hardware.
In this article will start to discuss more in details about the hardware we want to design based on a real example.

Old PSTN entry phone - door opening - #1

This can be an interesting project.
The idea is to use an old PSTN phone to control the user end of an entry phone system.

Different functionalities can be developed, this article is concentrated to the door opening one.

The idea is to interface the rotary dial of an old PSTN phone with a small MCU capable to decode a number composed with the rotary dial and activate a relay if a specific number is selected.