Lights show with Trinket M0

When needed a simple LED show, how to proceed from the idea to building ?

This article is more to discuss strategies and ways to approach a problem rather than describe in detail what is done (also if there is something about that too in it).

Arduino IDE settings for : Trinket M0

The Adafruit Trinket M0 is a small microcontroller from Adafruit, successor of the Adafruit Trinket (3V and 5V) and it can be programmed using Arduino IDE.

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.

A family size UV sterilizer - intro

In this time of COVID is necessary to sterilize often things, like masks and objects.

To do so I decided to build an UV-C Box Sterilizer.
UV lights are used to sterilize object since ... forever :). On the market exists UV sterilizer for phones and small objects but this is the point, is not easy to fit in it many objects.

Thus the idea to build a bigger box capable to easily sterilize everyday objects, including facial masks and small PPE.
I will update this article every time I will add more information/details about the construction/test.

Arduino IDE settings for : Adafruit Trinket

The Adafruit Trinket is a small microcontroller from Adafruit and it can be programmed using Arduino IDE.

tRPOf with Trinket - updated

This article is about a RPOf circuit for the Raspberry Pi using a Trinket, thus the name  tRPOf.
The main difference from previous ones, is that this project uses a standard Adafruit Trinket as microcontroller instead the MSP430 in order to use "off the shelf" components with less effort of programming and a LiPo charger/USB DC/DC converter..