July 13, 2020
Description
Power Supply Unit to extend the RackPi shield by SliderBOR
https://www.thingiverse.com/thing:3022136
I've decided to simplify the power connections of my Pi's and to cut the need for single external power supplies. With this Power Supply Unit you'll be able to provide the power for up to 7 Pi's. It has one power cord to connect the main voltage with a main power switch and every single Pi can be powered separately with the single small switches.
I've no documentation about the self-made electrical circuit to distribute the power, but it’s quite simple: the input power (+) is connected to one connector of each of the 7 switches (via pin header and jumper wire). The other connector of the switch has a connection to one pin of the screw terminal (again with an jumper wire) and also a connection (with resistor in row) to the LED. The ground connection (-) is terminated on another pin header and the LEDs and the second pins of the screw connectors are terminated there. You can now easily connect a Micro USB Cable at the screw connectors to power your Pi’s with 5V. Switch off/on – that’s it. The green indicator light at the front shows you the active switches.
List of materials and links:
Example Links for the materials:
LED 3mm green
https://www.reichelt.de/led-3-mm-bedrahtet-gruen-3-2-mcd-60-led-3mm-2ma-gn-p21624.html?&trstct=lsbght_sldr::21626
1,5K ohm resistor
https://www.reichelt.de/widerstand-metallschicht-1-5-kohm-axial-0-4-w-1-vis-c1501fc100-p237121.html?&trstct=pos_1
Power Switch (small)
https://de.aliexpress.com/item/10-teile-los-KCD1-15-10mm-2PIN-Boot-Rocker-Switch-SPST-Snap-in-auf-off-Micro/32880358926.html?spm=a2g0s.9042311.0.0.84f34c4dpXjMnl
Power Switch (large)
https://de.aliexpress.com/item/Latching-Rocker-Switch-Power-Switch-I-O-4-Pins-With-Light-16A-250VAC-20A-125VAC-KCD4/32829575455.html?spm=a2g0s.9042311.0.0.84f34c4dpXjMnl
Power Supply 50W 5V
https://www.reichelt.de/schaltnetzteil-geschlossen-50-w-5-v-10-a-mw-lrs-50-5-p202960.html?&trstct=pos_49
Micro USB Cables
https://www.reichelt.de/micro-usb-b-freie-enden-1-8-m-sw-musb-10080100-p198956.html?&trstct=pos_2
Screw terminals
https://www.reichelt.de/loetbare-schraubklemme-2-pol-rm-5-mm-90-rnd-205-00045-p170233.html?&trstct=pos_1
Jumper Wires
https://de.aliexpress.com/item/40pcs-lot-10cm-40P-2-54mm-dupont-cable-jumper-wire-dupont-line-female-to-female-dupont/32675262586.html?spm=a2g0s.9042311.0.0.84f34c4dpXjMnl
Solderable pin header
https://de.aliexpress.com/item/10-ST-CKE-40Pin-1x40-P-M-nnlichen-Zerbrechliche-Stiftleiste-Streifen-2-54mm-Lang-Blau-Rot/32863408765.html?spm=a2g0s.9042311.0.0.84f34c4dpXjMnl
Ciruit board
https://de.aliexpress.com/item/10-st-cke-5x7-cm-5-7-neue-Prototyp-Papier-Kupfer-PCB-Universal-Experiment-Matrix-Circuit/32853188386.html?spm=a2g0s.9042311.0.0.27424c4dCzOgPU
screws and nuts
https://www.reichelt.de/flach-senkkopfschrauben-schlitz-m2-16-mm-ssk-m2x16-200-p65729.html?&trstct=pos_0
https://de.aliexpress.com/item/100-pcs-lot-DIN934-edelstahl-hexagon-muttern-metric-gewinde-hex-mutter-SUS304-M1-M1-2-M1/1000005379037.html?spm=a2g0s.9042311.0.0.84f34c4dpXjMnl
License:
Creative Commons - Attribution - Non-Commercial
ReWOOrk
