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

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Archive for the ‘Hardware Development’ Category

NanoPi NEO2 1GB Metal Complete Kit, NP-NEO2-1G-STK – Antratek Electronics

Posted by jpluimers on 2021/02/24

Still an interesting device: [WayBack] NanoPi NEO2 1GB Metal Complete Kit, NP-NEO2-1G-STK – Antratek Electronics:

The NEO2 Metal Complete Kit includes:

  • NanoPi NEO2 1GB
  • NanoHat OLED
  • Aluminum housing with 3 brass buttons
  • Paste and pads
  • MicroUSB cable
  • 8GB MicroSD Card with pre-installed FriendlyCore Ubuntu
  • Screws and screw driver
  • NanoPi NEO2 quick start guide

The NanoPi NEO2 LTS (Long Term Support) is a super tiny ARM board made by FriendlyElec and uses Allwinner’s 64-bit H5 quad-core SoC (ARM Cortex-A53). It has internal hexa-core Mali450 GPU and 512MB DDR3 RAM.

The NanoPi NEO2 has Gigabit Ethernet and one USB host port. These features make it especially suitable for applications that require high data throughput, high-speed data transmission and high performance.

 

–jeroen

Posted in Development, Hardware Development | Leave a Comment »

Electronics-Salon DIN Rail Mount +/-20Amp AC/DC Current Sensor Module, based on ACS712: Amazon.com: Industrial & Scientific

Posted by jpluimers on 2020/12/24

For my link archive (this DIN rail device allow sensing current used by a circuit; models for 5A/20A/30A).

Thanks Matthijs ter Woord for pointing me to this.

Schematics show it uses an LM317 linear voltage regulator (to get 5V out of a 8V-35V range) next to the ACS712 current sensor (based on the [WayBack] Hall effect) available in 5A, 20A and 30A varieties.

Documentation:

Schematics:

 

Read the rest of this entry »

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

Poundland lights unexpected feature and USB mod. to operate christmas lights using USB – YouTube

Posted by jpluimers on 2020/11/09

Cool video with nice ideas:

–jeroen

Posted in Development, Hardware Development | Leave a Comment »

PoE to ethernet + micro USB converters

Posted by jpluimers on 2020/11/06

The first is 100mbit, some do not get it to work with Raspberry Pi 3B+, but others do get it to work, even at 1Gbit:

The second is 1Gbit, about 40% more expensive, but just works:

Via: [WayBack] Thread by @Nick_Craver: “Shout out to @mstum for reminding me 1Gb PoE USB splitters are completely viable for Raspberry Pis – now running a fi PoE switches and using just 1 outlet on the UPS: … Less wiring and if the network’s […]”

–jeroen

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

Good tips for powering any kind of LED strips from the Adafruit NeoPixel Überguide | Adafruit Learning System

Posted by jpluimers on 2020/10/22

Read these tips before playing with any kind of LED strips: [WayBack] Powering NeoPixels | Adafruit NeoPixel Überguide | Adafruit Learning System.

There are more, but these are the most important:

  • When connecting NeoPixels to any live power source or microcontroller, ALWAYS CONNECT GROUND (–) BEFORE ANYTHING ELSE. Conversely, disconnect ground last when separating.
  • Adding a 300 to 500 Ohm resistor between your microcontroller’s data pin and the data input on the first NeoPixel can help prevent voltage spikes that might otherwise damage your first pixel. Please add one between your micro and NeoPixel.
  • Before connecting a NeoPixel strip to ANY source of power, we very strongly recommend adding a large capacitor (1000 µF, 6.3V or higher) across the + and – terminals. This prevents the initial onrush of current from damaging the pixels.
  • Be extremely cautious with bench power supplies. Some — even reputable, well-regarded brands — can produce a large voltage spike when initially switched on, instantly destroying your NeoPixels!
    If you use a bench supply, do not connect NeoPixels directly. Turn on the power supply first, let the voltage stabilize, then connect the pixels (GND first).

Via: [WayBack] Bouw je eigen ledtafel – Tot slot – Achtergrond – Tweakers

–jeroen

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

 
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