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Raspberry Pi Buffer Board

Never blow up the I/O again

Raspberry Pi Buffer Board
When you experiment with the Raspberry Pi on a regular basis and you connect a variety of external hardware to the GPIO port via the header you may well have caused some damage in the past. A voltage that’s too high, or an electrostatic discharge, blows up the port and you can say goodbye to your cherished credit card sized computer. The Raspberry Pi buffer board described in this article prevents all this!
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Gerber file

CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.

Elektor recommends its business partner Eurocircuits as the company of choice for its own prototypes and volume production in selected cases.

Components
Download the BOM list
The BOM (Bill of Materials) is the technically exhaustive listing of parts and other hardware items used to produce the working and tested prototype of any Elektor Labs project. The BOM file contains deeper information than the Component List published for the same project in Elektor Magazine. If required the BOM gets updated directly by our lab engineers. As a reader, you can download the list here.
Want to learn more about our BOM list? Read the BOM list article for extra information.
Component list

Component List

PCB 150719-1

 

Resistors

R1,R2 = 10kΩ, SMD 0603

 

Capacitors

C1-C8 = 100nF, 50V, 10%, X7R, SMD 0603

 

Semiconductors

IC1-IC4 = TXS0108EPWR, SMD TSSOP-20

 

Miscellaneous

K1 = 2x20 pinheader, vertical, pitch 2.54 mm or 40-pin GPIO stacking header: 2x20, extra high

K2 = 2x20 pinheader, vertical, pitch 2.54 mm

JP1,JP2 = 2 pinheader, vertical, pitch 2.54 mm

JP3 = 3 pinheader, vertical, pitch 2.54 mm

JP1,JP2,JP3 = Shunt jumper, pitch 2.54 mm

F1,F2 = PPTC Resettable Fuse, smd, polyfuse, 1210L050YR Littelfuse

PCB 150719-1 from the Elektor store [6]

 

PCB 150719-2 (T-board version)

Resistors

R1,R2 = 10kΩ, SMD 0603

 

Capacitors

C1-C8 = 100nF, 50V, 10%, X7R, SMD 0603

 

Semiconductors

IC1-IC4 = TXS0108EPWR, SMD TSSOP-20

 

Miscellaneous

K1 = 2x20 pinheader, vertical, pitch 2.54 mm or 40-pin GPIO stacking header: 2x20, extra high

K2 = 2x20 pinheader, vertical, pitch 2.54 mm

JP1,JP2 = 2 pinheader, vertical, pitch 2.54 mm

JP3 = 3 pinheader, vertical, pitch 2.54 mm

JP1,JP2,JP3 = jumper, pitch 2.54 mm

F1,F2 = PPTC resettable fuse, SMD, Polyfuse, 1210L050YR Littelfuse

PCB 150719-2 from the Elektor Store [7]

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