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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

Sonoff Wireless Switch Family Gets a $3 IP66 Waterproof Enclosure

Posted by jpluimers on 2019/07/15

Interesting stuff from a while back that I will be using soon: [WayBack] Sonoff Wireless Switch Family Gets a $3 IP66 Waterproof Enclosure.

Pictures via CNX Software; originally found via [WayBack] $2.90 waterproof case for +ITEAD Studio Sonoff switches… – Jean-Luc Aufranc – Google+

–jeroen

Read the rest of this entry »

Posted in Development, ESP8266, Hardware Development, IoT Internet of Things, Network-and-equipment, Power User | Leave a Comment »

No IPMI? Use a Raspberry Pi to remotely control the power of your computer

Posted by jpluimers on 2019/07/12

Interesting project: [WayBack] WtRPM: A Web-based (Wt) suite to power up/down your computers – mupuf.org

It hooks a RaspberryPi to your ATX power supply.

Via: [WayBack] gpio – Use Raspberry Pi to control PC’s power switch – Raspberry Pi Stack Exchange

–jeroen

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

Solid State vs. Electromechanical Relays | Arrow.com

Posted by jpluimers on 2019/06/27

For my reading list: [WayBack] Solid State vs. Electromechanical Relays | Arrow.com

When you need a power switching solution, you are faced with two competing technologies – electromechanical relays and solid state relays. So which is the right choice for your design?

Keywords: SSR versus EMR, SPDT

via:

–jeroen

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

Relays and Arduino / ESP8266 / ESP8266X

Posted by jpluimers on 2019/06/19

As a follow-up on Raspberry Pi and relays – follow up on Having one Raspberry Pi reset another Raspberry Pi through relay or transistor some of my research links to bring this to Arduino, ESP8266, ESP8266X and similar devices:

–jeroen

Posted in Arduino, Development, ESP8266, ESP8266X, Hardware Development | Leave a Comment »

Because FTDI history: Why is the atmega chip reset three times during programming? – Arduino Stack Exchange

Posted by jpluimers on 2019/06/18

For historic reference: [WayBackWhy is the atmega chip reset three times during programming? – Arduino Stack Exchange.

TL;DR:

It is to ensure the device is being reset, no matter which driver you use and how odd that driver behaves.

So what you are seeing there is

  1. first a brief toggle of DTR by the IDE to force a reset,
  2. then avrdudeopening the port and DTR going low,
  3. then finally the IDE toggling DTR again one last time to force a final reset.

–jeroen

Posted in Development, Hardware Development | Leave a Comment »

 
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