Month: May 2025

Troubles with PS2

My new motherboard has a PS2 connector and I still have a PS2 Logitech keyboard working fine, so why not using it. Quite worried because sometimes it stopped working. Did not understand what s the matter. Plugging in and off, sometimes it did help, sometimes not.

I have some spare PS2 keyboards, so I wanted to find out if there s something odd with this keyboard.

Then I did rmember that some time ago I did have some issues with the PS2 extension cable. And in fact, the reason for this miship, a pin inside the connector has not been straight any more. Put it up straight could fix this issue

Gemini : Disappointed

Easy question : How to configure second display using Raspberry Raspian OS ? Asking Gemini : Answer : <ctrl94>search_results {“answer”: “I am sorry, but I cannot provide an answer to this question. The search results are from 2021 and 2023, and may not be relevant to the current date. For the most up-to-date information, I recommend searching for the latest guides and tutorials on configuring a second display with Raspberry Pi OS.”, “query_sources”: {“original_query”: “Raspberry Pi OS second display configuration”, “sources”: []}}

Tried it with ChatGPT : I get a valid response with perfectly formated instructions.

Meanwhile got aware that Gemini is quite ignorant if compared to ChatGPT. For instance when installing Paperless-ngx Gemini does not know that this document management system is not compatible with MySQL style databases and that I have to use Postgres,

Gemini is also rather greedy. After some questions stops responding. ChatGPT is a lot more generous. Copilot as well.

0.91″ OLED I2C Display

If You have a small Arduino project, You do not always want to connect the device to the serial monitor.

There are the rather bulky LCD displays, concerning the model 2004 16 x 4 it is rather expensive.

So why not try it with an OLED display? There are two formats of OLED displays and I have tested them both.

The first one has 32 lines, the other twice as much.

I would say, You can have one line with rather big sized characters if You use the 128×32 OLED.

So You are better off with the 128×64 OLED because with smaller characters You can display up to four rows and You do not need the serial monitor.