Smart idea: powering a stack of Raspberry Pi using 2.1mm barrel connector splitter…
Posted by jpluimers on 2019/02/20
Smart idea by [WayBack] tinspin/rupy: Async. HTTP & NoSQL Distr. VHost PaaS at [WayBack] 687474703a2f2f686f73742e727570792e73652f636c75737465722e6a7067 (480×640):
Apart from one part I found on Amazon, most parts (and more if you want to built it for instance inside a case) can be obtained from [WayBack] DC : Adafruit Industries, Unique & fun DIY electronics and kits, see the pictures and links below.
I think [WayBack] power supply options for multiple PIs – Raspberry Pi Forums got inspired by this or vice versa.
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[WayBack] Amazon.com: kenable DC Power Splitter 5 way Adapter 2.1mm CCTV 12V PSU to 5 Camera Cable: Electronics 
[WayBack] Female DC Power adapter – 2.1mm jack to screw terminal block ID: 368 – $2.00 : Adafruit Industries, Unique & fun DIY electronics and kits
[WayBack] 2-Way 2.1mm DC Barrel Jack Splitter Squid ID: 1351 – $2.95 : Adafruit Industries, Unique & fun DIY electronics and kits
[WayBack] MicroUSB Plug to 5.5/2.1mm DC Barrel Jack Adapter ID: 2727 – $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits
[WayBack] Waterproof DC Power Cable Set – 5.5/2.1mm ID: 743 – $2.50 : Adafruit Industries, Unique & fun DIY electronics and kits
[WayBack] Male DC Power adapter – 2.1mm plug to screw terminal block ID: 369 – $2.00 : Adafruit Industries, Unique & fun DIY electronics and kits
[WayBack] Panel Mount 2.1mm DC barrel jack ID: 610 – $2.95 : Adafruit Industries, Unique & fun DIY electronics and kits
[WayBack] MicroUSB to 5.5/2.1mm DC Barrel Jack Adapter ID: 2789 – $1.95 : Adafruit Industries, Unique & fun DIY electronics and kits
[WayBack] 4-Way 2.1mm DC Barrel Jack Splitter ID: 1352 – $4.95 : Adafruit Industries, Unique & fun DIY electronics and kits
The Wiert Corner - irregular stream of stuff 
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