2 layers37 × 27 mm
Switch connector
noisebridge/sparkle-switch
RFID enabled switch for heavy equipment (work in progress)
12 parts
2 layers65 × 56 mm
Sparkleswitch pi
noisebridge/sparkle-switchRFID enabled switch for heavy equipment (work in progress)
- Size
- 65 × 56 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 26
- Nets
- 65
- Pads
- 184
- Tracks, vias
- 405, 14
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 27 Aug 2016
- Updated
- 23 Dec 2018
Overview
Sparkleswitch pi is an open-source printed circuit board by noisebridge, from the noisebridge/sparkle-switch repository on GitHub. It is a 2-layer board of 65 × 56 mm with 26 parts on 65 nets, routed with 405 tracks and 14 vias.
It is built around the 74HCT245. Its parts include 7 ICs, 5 resistors, 4 capacitors and 3 connectors.
Main components
1README
hardware/pi-hat/README.mdPi Sparkle HAT
The Sparkle HAT connects to Raspberry Pi GPIOs, does 3.3V->5V level shifting to connect to HUB75 LED matrixes (to be controlled with the rpi-rgb-matrix code), and the Sparkleswitch-specific IDC-12 connector to connect to the switch box.
The level shifters are needed as the LED matrixes need 5V logic level. We also use two free drivers to provide 5V TTL level for the trigger relay outputs on the IDC-12 connector.
Inputs (from switches and sense-lines all operating at 12V) are insulated with PC817 opto couplers. The relay trigger outputs are non-insulated as the receiving end uses opto-couplers already.
To provide strong mechanical support, the HAT is full size with all four mounting holes.
Parts
26| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 4k7 | Resistors_SMD:R_0603 | R2, R3, R4, R5 |
| 4 | PC817 | Housings_DIP:DIP-4_W7.62mm | U4, U5, U6, U7 |
| 3 | 100n | Capacitors_SMD:C_0603 | C1, C2, C3 |
| 3 | 74HCT245 | Housings_SSOP:SSOP-20_4.4x6.5mm_Pitch0.65mm | U1, U2, U3 |
| 2 | CONN_02X08 | Connectors_IDC:IDC-Header_2x08_Pitch2.54mm_Straight | Panel-1, Panel-2 |
| 1 | 10k | Resistors_SMD:R_0603 | R1 |
| 1 | 22u | Capacitors_SMD:C_1210 | C4 |
| 1 | CONN_02X20 | Socket_Strips:Socket_Strip_Straight_2x20_Pitch2.54mm | P1 |
| 1 | Conn_01x02 | TerminalBlock_4UCON:TerminalBlock_4UCON_19963_02x3.5mm_Straight | J1 |
| 1 | Conn_02x06_Odd_Even | Connectors_IDC:IDC-Header_2x06_Pitch2.54mm_Straight | J2 |
The 21 most common of 26 parts.
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Questions
How big is the Sparkleswitch pi PCB?
It measures 65 × 56 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sparkleswitch pi use?
26 parts, built around the 74HCT245. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Sparkleswitch pi KiCad files?
From the noisebridge/sparkle-switch repository on GitHub, at the commit this page was made from: the board is hardware/pi-hat/sparkleswitch-pi.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sparkleswitch pi design in my own project?
Its repository states no licence, so its author keeps all rights: ask noisebridge before reusing the design.