2 layers181.3 × 187 mm
2 layers337.6 × 133 mm
Summers
alfpedraza/electronicsKiCad Electronics Projects
- Size
- 337.6 × 133 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 260
- Nets
- 350
- Pads
- 1,146
- Tracks, vias
- 3,006, 59
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 13 Jul 2022
- Updated
- 2 Sep 2025
Overview
Summers is an open-source printed circuit board by alfpedraza, from the alfpedraza/electronics repository on GitHub. It is a 2-layer board of 337.6 × 133 mm with 260 parts on 350 nets, routed with 3,006 tracks and 59 vias.
It is built around the 74LS02PC, 74LS86 and 74LS04PC, with the 74LS32SC and BC547 among its other parts. Its parts include 176 resistors, 47 ICs, 8 diodes, 8 transistors and 6 switches.
Main components
5
74LS02PC
DIP-140℃~+70℃ 15ns@5V,15pF 2 2.7V 2V 4 4.75V~5.25V 400uA 500mV 74LS 800mV 8mA 8mA NOR Gate DIP-14 Logic Gates ROHSonsemiLogic Gates74LS86
DIP-14-20℃~+75℃ 10mA 2.7V 23ns@5V,15pF 2V 400mV 400uA 5V 74LS 800mV 8mA XOR Gate DIP-14 Logic Gates ROHSHITLogic Gates74LS04PC
PDIP-140℃~+70℃ 4.75V~5.25V 6 6.6mA 74LS PDIP-14 InvertersonsemiInverters
74LS32SC
-- Logic Gates ROHSTexas InstrumentsLogic Gates
BC547
TO-92Bipolar (BJT)Jiangsu Changjing Electronics Technology (CJ)
README
README.mdelectronics
KiCad Electronics Projects
Parts
260| Qty | Value | Footprint | References |
|---|---|---|---|
| 72 | 120k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R105, R106, R107, R108, R109, R110, R111, R112, R113, R114, R115, R116, R117, R118, R119, R120 +56 |
| 63 | 560 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R42, R43, R44, R45, R46, R47, R48, R49, R50, R51, R52, R100, R101, R102, R103, R104 +47 |
| 33 | 220 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R11, R13, R15, R17, R19, R21, R23, R25, R26, R27, R28, R29, R30 +17 |
| 11 | NetTie_2 | NetTie:NetTie-2_SMD_Pad0.5mm | NT1, NT2, NT3, NT4, NT5, NT6, NT7, NT8, NT9, NT10, NT11 |
| 9 | 74LS47 | SN74LS:DIP792W45P254L1969H508Q16 | U11, U13, U15, U17, U19, U21, U23, U25, U27 |
| 9 | NFD-5011B | Display_7Segment:7SegmentLED_LTS6760_LTS6780 | U12, U14, U16, U18, U20, U22, U24, U26, U28 |
| 9 | SN74185A | SN74LS:DIP792W45P254L1969H508Q16 | U29, U30, U31, U32, U33, U34, U35, U36, U37 |
| 8 | 330 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R10, R12, R14, R16, R18, R20, R22, R24 |
| 8 | 74LS08 | SN74LS:DIP794W45P254L1969H508Q14 | U2, U3, U7, U8, U39, U42, U44, U47 |
| 8 | BC547 | Package_TO_SOT_THT:TO-92_Wide | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 |
| 8 | LED | LED_THT:LED_D5.0mm | D1, D2, D3, D4, D5, D6, D7, D8 |
| 4 | 74LS02 | SN74LS:DIP794W45P254L1969H508Q14 | U4, U5, U9, U10 |
| 4 | 74LS86 | SN74LS:DIP794W45P254L1969H508Q14 | U38, U41, U43, U46 |
| 3 | SW_DIP_x08 | Button_Switch_THT:SW_DIP_SPSTx08_Slide_9.78x22.5mm_W7.62mm_P2.54mm | SW1, SW3, SW4 |
| 2 | 74LS04 | SN74LS:DIP794W45P254L1969H508Q14 | U1, U6 |
| 2 | 74LS32 | SN74LS:DIP794W45P254L1969H508Q14 | U40, U45 |
| 2 | SW_SPDT | Switches:SW_500SSP1S2M2QEA | SW5, SW6 |
| 2 | Screw_Terminal_01x02 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J1, J2 |
| 2 | USB_A | Connector_USB:USB_A_Molex_67643_Horizontal | J3, J4 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW2 |
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Questions
How big is the Summers PCB?
It measures 337.6 × 133 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Summers use?
260 parts, built around the 74LS02PC, 74LS86, 74LS04PC and 74LS32SC. 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 Summers KiCad files?
From the alfpedraza/electronics repository on GitHub, at the commit this page was made from: the board is summers/summers.kicad_pcb and its schematic digital-clocks/clock-clock-signal.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Summers design in my own project?
Its repository states no licence, so its author keeps all rights: ask alfpedraza before reusing the design.