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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Hardware Interfacing’ Category

PC to TV HDMI image too large for screen – [Solved] – Graphics Cards

Posted by jpluimers on 2020/03/23

Someone Somewhere said:

It’s a setting in the TV. Look for terms like ‘overscan’ , ‘pixel perfect’, ‘1:1’, or similar. Usually under the HDMI settings for that input.

In my case (my mother’s Samsung), the original setting was 16:9 which failed. What works is screen fit. Go figure.

Source: [WayBackPC to TV HDMI image too large for screen – [Solved] – Graphics Cards

–jeroen

Posted in Development, Hardware Interfacing, HDMI, Power User | Leave a Comment »

Use PiServer to easily set up a network of client Raspberry Pi clients connected to a single x86-based server via Ethernet.

Posted by jpluimers on 2020/01/07

On my list of things to try:

PiServer is our new piece of software that makes it easy to create a network of Pis you can centrally control — ideal for your computing classroom or club!

Source: [WayBack] The Raspberry Pi PiServer tool – Raspberry Pi

Via: [WayBack] Use PiServer to easily set up a network of client Raspberry Pis connected to a single x86-based server via Ethernet. With PiServer, you don’t need SD card… – Raspberry Pi – Google+

–jeroen

Posted in Development, Hardware Development, Hardware Interfacing, Raspberry Pi | Leave a Comment »

Brilliant device: iPazzPort Wireless Mini Handheld Keyboard with Touchpad Mouse Combo for Android TV Box and Raspberry Pi 3 and HTPC and XBMC KP-810-19S – Black: Computers & Accessories

Posted by jpluimers on 2020/01/03

Brilliant device: [WayBack] KP-810-19BTT Mini Bluetooth Keyboard with touchpad – Unisen Group iPazzPort

I got it via Amazon USA ([WayBack] iPazzPort Wireless Mini Handheld Keyboard with Touchpad Mouse Combo for Android TV Box and Raspberry Pi 3 and HTPC and XBMC KP-810-19S – Black: Computers & Accessories), but Amazon in Europe has it as well (this is the German link:[Archive.isiPazzPort Mini Wireless Handheld Tastatur mit Touchpad: AmazonSmile: Computer & Zubehör; replace .de with .fr, .co.uk, to find your local link).

There are this one is 2.4 Ghz, includes a USB dongle in the battery compartment and requires 2 AAA batteries.

There are Bluetooth and back-lit versions too which cost slightly more.

Via: [WayBack] Raspberry Pi Cluster – Software Team Lead

–jeroen

Posted in Development, Hardware Interfacing, Keyboards and Keyboard Shortcuts, Power User, USB | Leave a Comment »

Idea: managing a garage door with a modified Marantec switch, some sensors and Raspberry Pi

Posted by jpluimers on 2019/12/24

Some links to get this idea going, incomplete, as I have not yet included Domoticz or OpenHAB links:

I will likely need:

  • some optocouplers to decouple GPIO pins from the Marantec switch and sensors
  • sensors for detecting current state: open/closed/opening/closing/obstructed

Warning on selecting GPIO pins:

When the Raspberry Pi reboots GPIO pins are reset to their default state. This can cause your garage door to open without you issuing a command. Please make sure you pick the correct pins so that you don’t accidentally have your garage door opening after a power loss.

The following pins are pulled HIGH (they output a 3.3 volt signal) on reboot:

  • GPIO0/2
  • GPIO1/3
  • GPIO4
  • GPIO7
  • GPIO8

GPIO14 is configured as a Serial Transmit line, so avoid choosing that pin.

All other pins are pulled LOW (they have a 0 volt signal, same as GND).

If your relay triggers when the GPIO pin goes LOW, then pick a pin that starts out HIGH on reboot. If your relay triggers with the GPIO PIN goes HIGH then pick a GPIO pin that starts out LOW on reboot.

–jeroen

Posted in Development, Hardware Development, Hardware Interfacing, Raspberry Pi | Leave a Comment »

(53) Introducing the “Lab in a Box” Concept – Patrick Titiano & Kevin Hilman, BayLibre – YouTube

Posted by jpluimers on 2019/08/13

Related: Introducing The “Lab in a Box” Concept (ELC-E-2017-Prague).pdf

Via:

–jeroen

Read the rest of this entry »

Posted in Development, Hardware, Hardware Development, Hardware Interfacing, Power User, Raspberry Pi, Software Development | Leave a Comment »

 
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