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

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Archive for the ‘Raspberry Pi’ Category

18650 Battery shield V3(RaspberryPi&Arduino) from lspoplove on Tindie

Posted by jpluimers on 2020/03/04

As you know Tesla has thousands of 18650 batteries. The 18650 battery is a strong existence. So we made this 18650 battery shield for maker.

Features:

  • Battery protection(Over charge or Over discharge)
  • Micro USB port Input
  • Type-A USB Output
  • 0.5A current charging
  • 1 switch control USB output
  • 5~8V Input Voltage
  • 3V & 1A Output
  • 5V & 2A Output
  • LED indicate(Green means full,Red means charging)
  • 3V output port x3
  • 5V output port x3

Charging can only be done at 0.5A, so using it as a sort of UPS seems not possible, but an interesting device nonetheless.

The other products referenced from the same page are interesting too and will undoubtedly bring me some new ideas for some projects.

Source: [WayBack18650 Battery shield V3(RaspberryPi&Arduino) from lspoplove on Tindie

Via:

–jeroen

 

Posted in Arduino, Development, ESP8266, Hardware Development, Odroid, Raspberry Pi | Leave a Comment »

Identifying a Raspberry Pi visually or by the cpuinfo

Posted by jpluimers on 2020/02/28

Two links that help me identify the Raspberry Pi devices from my collection (which misses quite a few, but is too extensive to get them all right in the blink of an eye):

–jeroen

Posted in *nix, Development, Hardware Development, Power User, Raspberry Pi | Leave a Comment »

TL;DR: Raspberry Pi models 1..3 become hotter and hotter under load; no housing gives best cooling.

Posted by jpluimers on 2020/02/04

[WayBack] TIL Raspi Kühlkörper bringen nix. Lego schon.  – Kristian Köhntopp – Google+

Background information: [Archive.is] Mein Raspberry Pi 3 und sein Problem mit der Systemtemperatur · Un*xe

–jeroen

 

Posted in *nix, Debian, Development, Hardware, Hardware Development, Linux, Power User, Raspberry Pi, Raspbian | 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 »

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 »

 
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