2 layers51.6 × 34.1 mm
2 layers51.5 × 41 mm
Triple 555
sdp8483/pl_test_pcbVarious Test Circuits for all Projects
- Size
- 51.5 × 41 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 19
- Pads
- 72
- Tracks, vias
- 42, 0
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 22 Mar 2024
- Updated
- 22 May 2026
Overview
Triple 555 is an open-source printed circuit board by sdp8483, from the sdp8483/pl_test_pcb repository on GitHub, published under the MIT licence. It is a 2-layer board of 51.5 × 41 mm with 25 parts on 19 nets, routed with 42 tracks and 0 vias.
It is built around the NA555P. Its parts include 9 resistors, 3 capacitors, 3 ICs, 3 diodes and 3 connectors.
Main components
1README
README.mdprototype circuits that dont warrent a seperate repo. Mostly undocumented, enter at your own risk!
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R4, R7 |
| 3 | 10u | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1, C2, C3 |
| 3 | 470k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R5, R8 |
| 3 | 680 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R6, R9 |
| 3 | LED | LED_THT:LED_D5.0mm | D1, D2, D3 |
| 3 | NA555P | Package_DIP:DIP-8_W7.62mm | U1, U2, U3 |
| 2 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1, J2 |
| 1 | USB_B | pl_usb:USB_B_mill_spacing | J3 |
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Questions
How big is the Triple 555 PCB?
It measures 51.5 × 41 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Triple 555 use?
25 parts, built around the NA555P. 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 Triple 555 KiCad files?
From the sdp8483/pl_test_pcb repository on GitHub, at the commit this page was made from: the board is triple_555/triple_555.kicad_pcb and its schematic LGS5145/pcb/lgs5145_dcdc.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Triple 555 design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).